Not logged inRybka Chess Community Forum
Up Topic The Rybka Lounge / Test Positions / Somebody needs a good pounding. Wait... It's me.
- - By user923005 (****) [us] Date 2016-02-06 02:01
These positions (below) from the STS test set have dubious solutions. For all of these, my current analysis has a different solution than the published one. Keep in mind that many of them were made with engines as old as Rybka 1.0 and some were even made on a 32 bit operating system, way back in the day. So even though they were run for at least a full hour it is not surprising that some have questionable solutions. Even the newest one (STS 15) is about 2 years old.

I would like anyone with powerful hardware and Stockfish, Komodo or Houdini software to give as many as possible a good pounding.

Now, if you can't spare a week of CPU, that's fine. Just do any that look interesting or do a few or whatever.

They need at least the equivalent of one hour per position on a machine with 4 physical cores at 3GHz, and preferably more. The longer the better. If you had only one core, then 4 hours would be needed. If you had 16 cores, then 15 minutes should be OK.

I want to revise the test set with improved solutions where possible.

In addition, if you know of any STS problems not in this set with an alternative solution, I would like to know about it.
Attachment: sts-asc.epd - questionable STS positions (7k)
Parent - - By michael82 [hu] Date 2016-02-06 13:12
Has been started on i5-3330 (4 cores, 1024 MB Hash, 5400 000 ms, Stockfish 7 64 POPCNT). The total run time is 7.3 days.
Parent - - By user923005 (****) [us] Date 2016-02-06 22:25
I thank you profusely for your contribution.
Parent - - By michael82 [hu] Date 2016-02-14 21:18
The list is below (moves and cp values of evaluations are extracted from the .log file). If I understand well, a multipv analysis would be necessary to completely review the solutions given in the original STS epd files. And of course, possibly, repeating that with other engines too.
So these solutions are only single best moves found by Stockfish 7 x64 POPCNT (and not a set for each positions - unfortunately -, at least not yet )
(conditions are as above, 90 min wall-clock time, SMP, 4 threads on i5 CPU, 1024 MB hash table).
4r1k1/R3rpp1/1p3n1p/8/2Q5/4B2P/1q3PP1/3R2K1 w - -                       bestmove a7e7 ponder e8e7       cp 7
q5k1/4bpp1/r3p2p/2p5/1pP5/1P3NPP/1RQ1PP2/6K1 b - -                      bestmove e7f6 ponder b2b1       cp 50
qr4k1/3b1pp1/4p2p/n2pP3/n1pP4/Q1P2NP1/3N1P1P/1R3BK1 b - -               bestmove b8b1 ponder d2b1       cp 37
3r1qk1/6pp/1p1np3/2n4Q/p7/P3N1P1/1B2PP1P/3R2K1 w - -                    bestmove f2f3 ponder d8d7       cp 115
4r1k1/p5b1/P2p1pp1/q1pP3p/2Pn1BbP/2NP2P1/3Q2BK/1R6 w - -                bestmove c3b5 ponder a5b6       cp 0
5k2/4pp1p/r2p2p1/8/6P1/5P2/1R3B1P/2r2BK1 b - -                          bestmove f7f6 ponder g1g2       cp 15
8/p3p1k1/1p1p1pp1/4n3/3R3P/1Pr5/P5P1/3R2K1 b - -                        bestmove f6f5 ponder d4f4       cp 62
7k/3N1p2/p7/3p1rp1/8/1P2P2p/P4n2/2R2NK1 w - -                           bestmove c1c2 ponder f2g4       cp 127
5rk1/p3pp1p/2Q2bp1/q1P5/3p4/5BP1/Pr2PP1P/2RR2K1 w - -                   bestmove g1g2 ponder g8g7       cp 0
r5k1/3pppbp/6p1/4n3/1q2P3/4B3/P4PPP/2RQ1K1R w - -                       bestmove d1c2 ponder e5g4       cp 48
5r2/1N6/2p2Pk1/p1P1P1p1/3b3p/KP1N2n1/P6R/8 b - -                        bestmove g3e4 ponder h2c2       cp 121
5k2/p2q2p1/bp1p1p1p/3PnP1Q/1P1BP3/2P5/3N2P1/6K1 w - -                   bestmove d4e5 ponder d6e5       cp 0
1k2r1r1/ppp1q1b1/nn1pp3/1N3p1p/1PP2P2/PQ2B1PB/4PK1P/3R2R1 b - -         bestmove e6e5 ponder h3f5       cp 0
r4rk1/1p5p/p3pp2/2b5/P7/2N5/1P3PPP/R2R2K1 w - -                         bestmove c3e4 ponder a8c8       cp 31
2b3k1/p3qpbp/2p3p1/1pn1p3/4P3/PBP1NN1P/1PQ2PP1/6K1 b - -                bestmove e7d6 ponder c3c4       cp 20
r3r1k1/1p1q2bp/1n1p2p1/1PpPpp1n/p3P3/R1NQBN1P/1PP2PP1/4R1K1 w - -       bestmove f3g5 ponder h5f4       cp 30
r3r1k1/1b1nq2p/p2pNppQ/1ppP3n/P3P3/7P/1PB2PP1/R3RNK1 b - -              bestmove d7e5 ponder b2b3       cp -41
1q2rb2/3b1r1k/p1p4p/B3p1p1/1PPpN3/3P1P1P/3QR1P1/4R1K1 w - -             bestmove d2c2 ponder d7e6       cp 82
3rr1k1/1p2bppp/p1p5/P2P3q/2B1PPb1/1P1R4/3B1QP1/4R1K1 w - -              bestmove b3b4 ponder e7h4       cp 0
2rr2k1/5ppp/p3p3/1p2P3/1Pn5/2B1PqP1/P1Q2P1P/3RR1K1 b - -                bestmove g7g5 ponder d1d8       cp 0
r1r2nk1/5pp1/1pnpbq2/2B5/p1P1PN1p/8/PPNR1QP1/3R1BK1 b - -               bestmove b6c5 ponder f4e6       cp 87
3qr3/5pkp/p1npb1p1/3N4/2PpPP2/6P1/PQ4BP/1R5K w - -                      bestmove b2a3 ponder d8d7       cp 44   
r3k2r/1bq1bpp1/p4n2/2p1pP2/2NpP2p/3B4/PPP3PP/R1B1QR1K b k -             bestmove e8f8 ponder c1d2       cp -24
2r1r1k1/pb2bp1p/8/2p1Rp1q/P1N5/6P1/2Q2P1P/3R1BK1 w - -                  bestmove e5f5 ponder b7e4       cp 141
1r2r1k1/p2bp1b1/2p1nnpp/qpP2p2/3P3P/P1N1PBPN/1BQ2P2/1R2R1K1 w - -       bestmove d4d5 ponder e6c5       cp 200
1q1rb1k1/5p1p/p3pnpb/P1r5/2B1P3/1P3P2/2R1N1PP/R2NQ2K b - -              bestmove f6d7 ponder f3f4       cp 26
2r1rk2/1p2bpp1/p4nbp/4R3/P2R1P1B/2N5/1P2B1PP/5K2 b - -                  bestmove e8d8 ponder d4d8       cp 0
2b5/2p1r2k/1pP2q1p/p2Pp3/4R3/1PN1Q2P/P2KP3/8 w - -                      bestmove c3b5 ponder h7g7       cp 279
5rk1/8/3p3p/p1qP2p1/Rrb1P3/3p1P2/1P1Q1RP1/3N2K1 w - -                   bestmove a4b4 ponder a5b4       cp 0
r4rk1/pb1p2pp/1q1Ppn2/2p5/2P2P2/3BB3/PP2Q1PP/R3K2R b KQ -               bestmove b6d6 ponder a1d1       cp -45
r4r1k/p2nb1p1/1p2pPqp/3p4/P1pPn3/2P1BN1P/1QP1BPP1/R5RK b - -            bestmove f8f6 ponder a4a5       cp 117
4rk2/2p1rpp1/pbn3bp/1p2P3/PP6/1BP2NNP/5PP1/2R1R1K1 w - -                bestmove e5e6 ponder f7e6       cp 80
r4rk1/ppp1qp1p/2p3p1/4n3/4P2P/2N1QP2/PPP2P2/2KR3R w - -                 bestmove c3e2 ponder f8d8       cp 17
r5k1/1p5p/p1p1qrnP/2B1pb2/R1P5/2P2B2/P2Q2P1/5RK1 w - -                  bestmove a4b4 ponder f6f7       cp 137
q1rb2rk/1b3ppp/2n1p2n/p2pP3/B2P1PP1/Bp2RN1P/1RPNQ3/6K1 w - -            bestmove e3b3 ponder c6b4       cp 124
1r2r1k1/2qn1pb1/3p2pp/p1pP4/PpQ1PP2/1P4PP/1B4B1/3RR1K1 w - -            bestmove b2g7 ponder g8g7       cp 0
1rnr2k1/2Rb2bp/3p2p1/2pPpp2/1p5P/1P1PP1P1/3B1PK1/R4BN1 b - -            bestmove e5e4 ponder a1a2       cp 13
5rk1/1prn1qp1/p2p3p/3Ppp1P/7R/1NPQ1PP1/PP6/1K1R4 b - -                  bestmove f8e8 ponder h4h1       cp 84
2r2r1k/p3ppbp/qpnp2pn/5P2/2P1PP2/P1N1BB2/1PQ3RP/3R2K1 w - -             bestmove g1h1 ponder c8e8       cp 143
nr2q1k1/1p2rpb1/p2p2pp/P7/1PRN4/4BBPb/3Q1P1P/2R3K1 w - -                bestmove d4e2 ponder h3e6       cp 48
r3r1k1/5pp1/p1n2q1p/P1bp1P2/2p2P2/5N2/2BB3P/R2QRK2 b - -                bestmove d5d4 ponder a1a4       cp 12
2r5/4k1p1/4p2p/1pnbPp2/3B4/2P5/1PB3PP/5R1K b - -                        bestmove c5e4 ponder f1a1       cp 30
r5k1/5pbp/6P1/p2R4/1p5r/P5R1/1PP5/2KB4 b - -                            bestmove f7g6 ponder a3a4       cp 86
2r1n1k1/1p1R1r1p/2q1pp1B/p5p1/6P1/Q1P4P/PP6/1K1R4 b - -                 bestmove b7b5 ponder d7d8       cp 0
3r2k1/5p1p/p2qn1p1/P3N1r1/1P1pb1B1/2nN3P/5PPQ/2R1R2K b - -              bestmove h7h5 ponder g4f3       cp 0
3q4/7k/3ppp2/p3n2B/P1r1P2P/8/1PPQ4/1K3R2 w - -                          bestmove f1g1 ponder c4c5       cp 374
1k1r2r1/1b4p1/p4n1p/1pq1pPn1/2p1P3/P1N2N2/1PB1Q1PP/3R1R1K b - -         bestmove g8e8 ponder f1e1       cp 54
2r3k1/4n1b1/1p1pq1p1/4p3/2r2P1P/P2NP3/1B1Q3P/4RRK1 w - -                bestmove f4e5 ponder c4g4       cp 0
3r2k1/pp3bbp/3q1p2/2p5/5pQ1/1P3N2/P3R1PP/4R2K w - -                     bestmove e2d2 ponder d6c7       cp 242
r2q2kr/p3n3/1p1Bp1bp/3pP1pN/5PPn/3B3Q/2P2K2/1R5R w - -                  bestmove h5f6 ponder g8f7       cp 194
r3k2r/ppqbnpb1/n1p1p2p/P2pP1p1/3P4/1P1BBN1P/1NPQ1PP1/R3K2R w KQkq -     bestmove b3b4 ponder e7f5       cp 145
2br3k/2pqb2r/p1n1n3/P3PQ2/1pB5/5N2/1P1N1PPP/R3R1K1 b - -                bestmove d8f8 ponder f5e6       cp 146
2rq1rk1/1p2bpp1/4p3/pP1pP1np/P2P4/R3BP2/3Q2PP/1NR3K1 w - -              bestmove a3c3 ponder c8c3       cp 77
1nr3k1/1pr2pp1/p3bn2/P3p2p/1PP4P/3BNPP1/3RN1K1/R7 w - -                 bestmove e2c3 ponder g8f8       cp 16
2r3k1/2r1b3/p3p2p/3n2p1/2N1KP2/P2N2PP/2R5/2R5 b - -                     bestmove a6a5 ponder e4f3       cp 39
3b2nk/p2Nqrpp/1pB1p3/3pPnp1/1P1P1P1P/P7/2R1QB1K/8 w - -                 bestmove f4g5 ponder d8c7       cp 96
1r2kbQ1/1r1q1p2/p2p2n1/6P1/N1pBP3/P1N5/1PPR4/K7 w - -                   bestmove d4g7 ponder f7f6       cp 387
r3nbk1/1b3ppp/pr6/1pp1PBq1/P1P5/7P/1B1NQPP1/R3R1K1 w - -                bestmove f5g4 ponder b5a4       cp 93
5nk1/1bq2pp1/rp1r1b1p/1R1p1B2/2pP4/2N1PN2/PQ3PPP/1R4K1 w - -            bestmove a2a4 ponder c7e7       cp 34
3r2k1/2q1rp2/4p1p1/2p1P2p/1p3Q2/1P1bP1PP/P4RBK/2R5 w - -                bestmove f4f6 ponder d3a6       cp 93
r2r2k1/2pq1pp1/p1p2b1p/5p2/P2P4/2N3P1/1PQ1PP1P/R2R2K1 b - -             bestmove f5f4 ponder c3e4       cp 0
1r1rq1k1/1p4p1/pNb1pp1p/1pP5/3P4/1PQ5/5PPP/R3R1K1 w - -                 bestmove e1d1 ponder e8g6       cp -43
2r3k1/1q6/4p3/p2p2bp/P2P1n2/2P1NP2/1PB4B/1R2R1K1 b - -                  bestmove b7f7 ponder g1h1       cp 361
1k1r4/4rp2/1p1qbnp1/p2p3p/P2P4/1Nn2P2/1P1QBRPP/2R3K1 w - -              bestmove c1c3 ponder d8c8       cp 0
6k1/q4p2/2b1p2p/4Pp2/pP3N2/Q4PP1/6KP/8 b - -                            bestmove a7d4 ponder a3d3       cp 526
1r2qrk1/3bn3/pp1p3p/n1p1p1p1/P1P5/B1PP1NPP/2Q2PB1/1R2R1K1 w - -         bestmove c2e2 ponder d7f5       cp 25
r4q1k/1p2b2r/7P/p1pPp3/8/P2PP1R1/1P4Q1/1K5R w - -                       bestmove g2e4 ponder e7f6       cp 387
r3rb2/1p3k2/p1p2p2/2q2bpp/2PR4/1PQ4P/P4PPB/3R1BK1 b - -                 bestmove h5h4 ponder d4d2       cp -57
1rb1r1k1/4qpb1/p1np1npp/1pp5/2P1PN2/1P3PP1/PB4BP/1QRR1N1K b - -         bestmove c6e5 ponder f1e3       cp -20
2r1r1k1/1b1n1pp1/1q2p2p/3p3n/P2N4/BP1NPP1P/2B3P1/2R1Q1K1 w - -          bestmove e1d2 ponder b7a6       cp 42
r1b1qrk1/pp2bppp/4pn2/4Q1B1/8/2N5/PPP2PPP/2KR1B1R w - -                 bestmove e5g3 ponder c8d7       cp 41
b2rrbk1/2q2p1p/pn1p2p1/1p4P1/2nNPB1P/P1N3Q1/1PP3B1/1K1RR3 w - -         bestmove h4h5 ponder f8g7       cp -27
5r2/4k3/2qpp2b/pN2p2n/P3PR1p/2P5/6PP/QB2R2K b - -                       bestmove h6f4 ponder a1a3       cp 530
2qr2r1/1p3pk1/p1np1np1/7p/2P1Pp2/1PN5/3QN1PP/4RR1K w - -                bestmove c3d5 ponder c6e5       cp 77
r2r1k2/2b1npp1/p1np3p/1p6/3P1B2/P1N4P/1PBR1PP1/3qR1K1 w - -             bestmove e1d1 ponder c7b6       cp 17
2r2k1r/1q1nbpp1/p2p4/1p1Pp3/8/P1B2BP1/1PP1QP2/3RR1K1 b - -              bestmove f7f5 ponder e2e3       cp 51
1r6/7k/1p4r1/1P2p3/2P1p2P/2RbB3/6P1/2R4K w - -                          bestmove h1h2 ponder g6g4       cp 151
r4rn1/2q2p1k/p2p2np/4pb1Q/1pP1P3/4B2P/2P3PN/3R1R1K w - -                bestmove e3h6 ponder g8h6       cp 451
2r2rk1/1pp2qpb/1n2p2p/pP1p1P2/P2PPBP1/7P/3NQ3/R1R3K1 w - -              bestmove a1a3 ponder d5e4       cp 0
2r1r1k1/3n2pp/b1p1pb2/1pPp1p1q/p2PnB1P/P4NP1/1PQNPPB1/R2R1K2 b - -      bestmove h7h6 ponder f3e5       cp 111
2r2rk1/3bqppp/2p5/p2pb2Q/Pn1P1P2/1P2PN2/6PP/R1B2RK1 w - -               bestmove h5e5 ponder e7d8       cp 71
4r1k1/3b1q2/2pn1p1b/1p3P2/p2PN1PP/P4Q2/1P4R1/4R1K1 b - -                bestmove g8f8 ponder g2e2       cp 24
r2qk2r/3nbpp1/2bBp2p/p3P3/1p6/8/PPPQBPPP/1NKR3R w kq -                  bestmove f2f4 ponder a8c8       cp 24
2r5/1b2kp1p/3qp1p1/1B6/3pn2N/8/PP2QPPP/4R1K1 b - -                      bestmove d6f4 ponder g2g3       cp 162
r5k1/1pp1r1pp/3pbpq1/pB2n3/P1P5/1P2BP2/2PQ2PP/2KRR3 w - -               bestmove c4c5 ponder d6d5       cp 118
1k2r3/1p1bP3/2p2p1Q/Ppb5/4Rp1P/2q2N1P/5PB1/6K1 b - -                    bestmove b8c7 ponder h4h5       cp 191
r5k1/p1q2pbp/Ppp1bnp1/4p1B1/Q1P1P3/2N4P/1P2BPP1/5RK1 w - -              bestmove f1d1 ponder a8c8       cp 5
r2r2k1/4qp2/p5p1/2p4p/5P2/3RP1K1/PPQ4P/3R4 b - -                        bestmove d8e8 ponder b2b3       cp 48
r4rk1/pp5p/2pp2pb/2n1nq2/2P2P2/2N1B3/PP2B1PP/2RQR1K1 w - -              bestmove e1f1 ponder e5d3       cp 5
2r1q1k1/2p2rbp/p2p2p1/Q2P4/b3P3/3p2P1/3B1PBP/2R1R1K1 w - -              bestmove e4e5 ponder e8b5       cp 63
1r6/8/1r5p/p2pk3/4p3/2P4P/RP2B1n1/1RK5 b - -                            bestmove b6f6 ponder b2b3       cp 583
1r2rqk1/8/bn1p3p/B1p2p2/p1PnpP2/P3R2Q/1P3NPP/2R2BK1 b - -               bestmove e8e6 ponder g2g4       cp 80
3rr3/p3b1kp/2p2pp1/1q1npb2/4N1PB/1NP2Q2/PP3P1P/R2R2K1 b - -             bestmove f5e4 ponder f3e4       cp 60
r4rk1/1bq2pp1/1p1bpn1p/p2nN3/P1BP4/5NP1/1P1BQPKP/R3R3 b - -             bestmove d6e5 ponder d4e5       cp 61
1k1r3r/pb1q2p1/B4p2/2p4p/Pp1bPPn1/7P/1P2Q1P1/R1BN1R1K b - -             bestmove h8e8 ponder a6b7       cp 155
8/1p1bkq2/p2pp1n1/P1b1p1P1/4P1QN/1KNB4/1PP5/8 b - -                     bestmove g6h4 ponder g4h4       cp 1
2r2bk1/R4pp1/3pqnnp/R3p3/1P2P3/3Q1NNP/2rB1PPK/8 w - -                   bestmove a7a8 ponder c2b2       cp 0
1r1r2k1/2p1qpp1/pnP1b2p/1p2P3/3N4/P3P2P/1QB2PP1/3RR1K1 w - -            bestmove b2c3 ponder b6c4       cp 112
r4rk1/1b1q1ppp/pb1p1nn1/1pp1p3/1PP1P3/P2PNN1P/B2B1PP1/2RQR1K1 w - -     bestmove b4c5 ponder b6c5       cp 25
r2r2k1/p2n1p2/4q2p/3p2p1/1PpB4/P1NnPP2/2Q3PP/R2R2K1 b - -               bestmove a7a6 ponder c3a4       cp 0
r3rnk1/1bpq1pp1/p2p3p/1p1Pp1b1/P3P1P1/1BP1N1P1/1P3P2/R1BQR1K1 w - -     bestmove e3f5 ponder g5c1       cp 70
r1b1r1k1/4q1pp/1bp1pp2/np6/3PN3/3NP1PB/R1Q2P1P/3R2K1 b - -              bestmove g8h8 ponder h3g2       cp 46
2k2r1r/1b4p1/1nq1p3/1p5p/5P2/1Pp1B1KP/2B1QRP1/R7 w - -                  bestmove e3b6 ponder c6b6       cp 180
5rk1/2p1q2p/1r2p2Q/3nNp2/8/6P1/1P3P1P/2RR2K1 w - -                      bestmove d1d2 ponder b6a6       cp 68
5r1k/2p3q1/1p1npr2/pPn1N1pp/P1PN4/R4PPP/4Q1K1/3R4 w - -                 bestmove d1e1 ponder h5h4       cp 24
r1bq1rk1/ppp3bp/n2p1pp1/3P4/2P1Pp2/2N2N1P/PP2BPP1/R2QR1K1 w - -         bestmove e2f1 ponder a6c5       cp 40
r1qr2k1/4bp2/p1p1p1p1/2pb4/PP1P1P2/3NQ3/5BPP/R2R2K1 w - -               bestmove d4c5 ponder e7f6       cp 110
2n2rk1/p2b2bp/3p2p1/q1pPp2n/P1P1P3/1QN5/3BBNPP/1R4K1 w - -              bestmove b3a2 ponder h5f6       cp 69
qr4k1/6b1/r6p/P2p1pp1/1B1P4/Q2NP1P1/5P1P/2R3K1 w - -                    bestmove h2h3 ponder a6a7       cp 139
1r3r2/1p3q1k/1Q1p4/2pNbpp1/2P5/7P/PP2R1P1/3R3K b - -                    bestmove f5f4 ponder b6c7       cp 51
r3r1k1/4bppp/pnq5/1pp1P2b/4NB2/1P2QN2/1P3PPP/3RR1K1 w - -               bestmove f4g3 ponder b6d5       cp -13
1k1r3r/1p1b1Q1p/p7/q3p3/4p3/2P1N3/P4PPP/R4RK1 w - -                     bestmove f1d1 ponder a5c7       cp 96
5rk1/5bpp/8/r2p1P2/3Bp1P1/1BR1P1K1/1n5P/2R5 w - -                       bestmove c3c7 ponder a5b5       cp 479
3q3k/5p1p/3rp3/p4p1P/PbP2Q2/1p3N2/1P2KPP1/1R6 b - -                     bestmove h8g8 ponder f4g3       cp 17
r4rk1/1p1qn1bp/p1npp1p1/2p1p3/4P2P/N1PPB1P1/1P3PB1/R2QR1K1 w - -        bestmove g2h3 ponder a8e8       cp 38
1r1q1rk1/1b1n1p1p/p2b1np1/3pN3/3P1P2/P1N5/3BB1PP/1R1Q1RK1 b - -         bestmove d6a3 ponder g1h1       cp -9
7k/4r1p1/1p1b3p/p4q2/8/P5PP/1P1NQPK1/4R3 w - -                          bestmove d2e4 ponder d6c5       cp 117


Parent - - By user923005 (****) [us] Date 2016-02-15 19:34
Thank you very kindly for your efforts.
I will carefully review each record.

I am running multi-pv analysis for each record (2/3 done right now).
I will also repeat the runs with several additional engines.
You have saved me some time.
Do you have the depth figures for these records?  That is important for my analysis.
You can just give me the raw logs instead of parsing through them if you like.
Parent - - By michael82 [hu] Date 2016-02-15 20:41
This is the raw log file as an attachment.
Attachment: Stockfish7_90min_4cores.7z (666k)
Parent - By user923005 (****) [us] Date 2016-02-15 22:51
Thanks.  This will be very useful.
Attachment: ss.epd - I used your log file to create the attached EPD record set (29k)
Parent - By Peter Grayson (****) [gb] Date 2016-02-06 15:16
:grin:, I just came across this link ...

https://sites.google.com/site/strategictestsuite/about-1

and noted one of the accredited names at the bottom.

May be worth reminding; quoting from that page "Most EPD's in STS have immediate short term advantage in strategy"

Peter
- - By Peter Grayson (****) [gb] Date 2016-02-06 14:36
Dann, the file you've attached is FEN not EPD and consequently will not read into the database I use for testing epd positions.

As I recall, the Strategic Test Suites were specifically developed for engine tuning. The original test sets came with a number of scored solutions based on thematics unless there was a single move solution so it had already been established there was more than one solution for most positions, perhaps some better than others in absolute terms but because these were used for engine tuning then what is identified as best by one engine may not be so for another with a different playing style. The STS gave developers a useful tool to check if making adjustments for one aspect of their engine's playing style adversely affected another.

Generally the recommended time per position was 5 to 10 seconds and to use a single core only. Using SMP could cloud the results that needed to be repeatable otherwise would be of little value to the developer. Suspect some 90% of the positions have a concensus of solution by today's top engines but where there are discrepancies it is unclear what value there is in trying to determine an absolute best move by one engine?

Peter
Parent - - By user923005 (****) [us] Date 2016-02-06 22:22
All that you have said is true.
But the idea is to test strategic and not tactical terms.  The plan is to emphasize items that really help only in long term planning and do not result in an immediate snack of a piece or a pawn.

The software has advanced exponentially since we started the project.
The hardware has advanced exponentially since we started the project.

Therefore, the current analysis we can produce is now super-exponentially better.

Every sensible answer gets a positive score, and the better the answer the better the score.
Therefore, the best answer should get the best score.

The quality of analysis for one full hour of Rybka 1.0 32 bits can now be accomplished in the blink of an eye on a modern system running modern hardware.
It is actually pretty remarkable that only 7.8% of the problems have fallen during the decade, especially considering the nature of the test.

I have also found a small handful that are clearly tactical problems and not strategic and they should probably get substitutes.
Parent - - By Peter Grayson (****) [gb] Date 2016-02-07 20:35
Ok, but I decided on a different approach. In consideration of my previous comment that different engines may use different criteria it seemed incorrect to use just a single engine. Therefore I ran a 30 seconds per position test using 3 engines to identify if any of the positions incurred failures by all 3. Using Houdini 4 Pro 64, Stockfish 7 64 BYO 2016x and Komodo 9.3 64-bit + 4Gb hash each. A quick observation was that for most of the positions that were solved, the solving times were very fast. In most cases under 2 seconds with few hitting the 20s+ mark. The suspicion was that if the engine failed to solve quickly there may be a strong possibility it would fail to solve at all or at least within a reasonable time management period.

The individual scores finding the primary move were:
Houdini 4 Pro: 1408 out of 1500 = 93.8%. Average time = 1.50s / 10.68
Komodo 9.3: 1388 out of 1500 = 92.5%. Average time = 1.43s / 12.29
Stockfish 7 BYO 2016x: 1382 out of 1500 = 92.1%. Average time = 1.63s / 11.80

Of the 1500 positions just 11 gave failures by all 3 engines. However, there needed to be another control because all three engines were of the new generation where heavy pruning is used so I also ran the positions past one of the old school engines namely Deep Hiarcs 14 that solved a further 5 of the positions leaving just 6 of the original 1500 positions that caused all 4 engines to fail to solve.

Initial conclusion was there is little wrong with the original appraisal of best move for all of these positions and to further test the remaining 6 positions in more depth was a much easier task than 100+.

Positions all 4 engines failed to solve were: 353, 400, 801,818, 895 and 1192.

As an after thought, I then ran these six positions past Deep Rybka 4.1 and it solved positions 353, 801 and 818 in under 10 seconds with a 30 seconds cut off. So just positions 400, 895 and 1192 remained for longer analysis. Looking at position 895, 1.Nd5 looked the more natural Knight outpost but strange then that Stockfish and Komodo were selecting a Rook move!

Given 15 minutes per position,
Houdini 4 Pro solved Position 400 in 30.48s, Position 895 preferred 1..Nd5, Position 1192 preferred 1.Rxe2
Komodo 9.3 solved Position 400 in 72.88s, Position 895 settled on 1..Rac8 after also looking at 1..Nd5 for a while, Position 1192 only 1.Rxe2 was considered.
Stockfish 7 64 BYO 2016x  Position 400 struggled to decide between 1.Nc4 and 1.Bd5 settling for the latter after 121.23s, Position 895 preferred 1..Rac8 on 576s after initially selecting 1..Nd5, Position 1192 only 1.Rxe2 was considered.
Deep Rybka 4.1 Position 400 also selected 1.Bd5 in 126s, Position 895 1..Nd5, Position 1192 1.Rxe2
Deep Hiarcs 14 Position 400 1.Bd5 after looking closely on the potential of the Knight sac on d5 596s, Position 895 1..Rfc8 until 1..Nd5 after 305s, Position 1192 also settled on 1.Re2

So I have it that just two of the original 1500 positions may need review. 895 and 1192

I have attached a zipped file containing the individual timings in xls spreadsheet (old version) that can be read into Open Office, MS Office or the even older Lotus 123, the databases with the engine's timing results and this appraisal.

The dilemna of course is whether you determine the newer engine's appraisal is better but inmy tests that has certainly not been the case when I would not consider using Stockfish or Komodo on their own. I usually include Houdini too.

Peter
Attachment: Sts1-15testdata.zip - Test data (283k)
Parent - By user923005 (****) [us] Date 2016-02-08 12:19
Thank you for your efforts to help improve the data
Parent - - By user923005 (****) [us] Date 2016-02-11 19:26
For your two special positions:

Stockfish:

Searching:
r4rk1/5p1p/p2qpnp1/1p2b3/3p4/3B1R2/PPQ3PP/R1BN3K b - - 0 1

infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0

1   +0.27   00:00      38  Nd5
2   +2.13   00:00     110  Rfc8 Qb1
3   +0.52   00:00     169  Rfc8 Qd2 Nd5
4   +0.40   00:00     238  Rfc8 Qd2 Nd5 a4
5   +0.28   00:00     496  Nd5 Nf2 f5 Bh6 Rf7
6   +0.22   00:00     595  Nd5 Qf2 f5 a4 Nb4 Bd2
7   +0.30   00:00     853  Nd5 Qf2 Bg7 a4 Nb4 Qf1 Nxd3 Qxd3
8   +0.41   00:00    2006  Nd5 a4 f5 axb5 axb5 Rxa8 Rxa8 Bxb5
9   +0.38   00:00    3034  Nd5 Bh6 Rfc8 Qf2 Nb4 Qh4 Nxd3 Rxd3 f5
10   +0.45   00:00    3552  Nd5 Bh6 Rfc8 Qf2 f5 b3 Rab8 a4 bxa4 Rxa4 Nb4
11   +0.43   00:00    5069  Nd5 Bh6 Rfc8 Qf2 f5 b3 Nb4 a3 Nxd3 Rxd3 Bf6 Qf3 e5 Qb7
12   +0.36   00:00   31162  Nd5 a4 Rfc8 Qf2 Nb4 Bg5 f6 Bd2 Nxd3 Rxd3 Qd5 b4 bxa4
13   +0.42   00:00   67316  Nd5 a4 Rfc8 Qf2 Nb4 b3 Nxd3 Rxd3 Bg7 axb5 e5 Ba3 Qe6 b6 Qxb6
14   +0.28   00:00  129639  Nd5 a4 Rfc8 Qf2 Nb4 Qe2 Nxd3 Qxd3 Rab8 Nf2 bxa4 Ng4 Bg7 Nh6+ Bxh6
15   +0.35   00:00  136310  Nd5 a4 Rfc8 Qf2 Nb4 Bg5 Nxd3 Rxd3 Qd5 Qf3 Qxf3 Rxf3 Bg7 Nf2 e5
16   +0.36   00:00  173659  Nd5 a4 Rfc8 Qd2 Bg7 Nf2 f5 axb5 axb5 Rxa8 Rxa8 Bxb5 e5 Ra3 Rxa3 bxa3 e4 Qa5 e3
17   +0.28   00:00  339875  Nd5 a4 Rfc8 Qf2 Nb4 Bh6 Nxd3 Rxd3 f5 axb5 axb5 Rxa8 Rxa8 Qf3 Rc8 Qb7 Rb8 Qf3 b4 Qf2 Qc5 b3 Rc8
18   +0.16   00:02   1139K  Nd5 a4 Rfc8 Qd2 Bg7 Nf2 f5 axb5 axb5 Rxa8 Rxa8 Bxb5 Rc8 b3 e5 Rh3 Nf4 Bc4+ Rxc4 bxc4 Nxh3 Nxh3
19   +0.17   00:02   1277K  Nd5 a4 Rfc8 Qf2 f5 Bh6 bxa4 Rxa4 Nb4 Bb1 a5 Bd2 Qd5 b3 Bg7 Qh4 Qb5 Bxb4 axb4 Bd3 Qe5 Nb2 Bf6 Qh6
20   +0.30   00:05   3336K  Nd5 a4 Nb4 Qd2 Nxd3 Qxd3 bxa4 Rxa4 Bg7 Bd2 Rfc8 Rc4 Rab8 Nf2 f5 Rh3 e5 Qb3 Kh8 Rxc8+ Rxc8 Qf7 e4
21   +0.45   00:14   8759K  Nd5 Bh6 Bg7 Bxg7 Kxg7 g4 e5 Nf2 Ne3 Qe2 f6 Be4 Rac8 a4 bxa4 Rxe3 dxe3 Qxe3 Rfd8 Rxa4 Qd2
22   +0.35   00:22  13214K  Nd5 Qe2 f5 a4 Bf4 Bxf4 Nxf4 Qd2 Nxd3 Rxd3 e5 b4 Rfd8 Rda3 bxa4 Rxa4 Rab8 Qa2+ Qd5 Qxd5+ Rxd5 Kg1 Rdd8 R1a3 d3 Rb3 Rd4 Rxa6
23   +0.38   00:23  13861K  Nd5 Qe2 f5 a4 Bf4 Bxf4 Nxf4 Qd2 Nxd3 Rxd3 e5 b4 Rfd8 Rda3 Rac8 axb5 axb5 Ra7 Qd5 Kg1 Rd7 R1a6 e4 Ra5 Rcd8 g3 Rc8 Rxd7 Qxd7 Qe2 d3
24   +0.21   00:43  26053K  Nd5 Qe2 Bf4 Nf2 Bxc1 Rxc1 f5 a4 e5 axb5 axb5 Bxb5 Rfc8 Rd1 Kg7 Bc4 e4 Bxd5 Qxd5 Rh3 Kg8 Ra3 Rxa3 bxa3 Rd8 Kg1 Qb3 Ra1 Qd5 a4 Rb8 Qd1
25   +0.20   00:58  34627K  Nd5 Qf2 Bg7 g4 Nb4 Be4 Rac8 Bf4 Qd7 g5 Nd5 Qg2 f5 gxf6 Nxf6 Bd3 Nd5 Bd2 Rxf3 Qxf3 Nb6 Nf2 Nc4 Ne4 Nxb2 Rf1 Nxd3 Qxd3 Be5 Nf6+ Bxf6 Rxf6
26   +0.21   01:09  41205K  Nd5 Qf2 f5 a4 Bg7 axb5 axb5 Rxa8 Rxa8 Bxb5 Qc5 Qe2 Qxc1 Qxe6+ Kh8 Qxd5 Qxd1+ Rf1 Qa1 g4 Qa5 b4 Qd8 Qxd8+ Rxd8 gxf5 d3 fxg6 d2 Rd1 hxg6 Bc6 Be5 Kg2 Kg7 Kf3
27   +0.19   01:18  46233K  Nd5 Qf2 f5 a4 Bg7 axb5 axb5 Rxa8 Rxa8 Bxb5 Qc5 Qe2 Qxc1 Qxe6+ Kh8 Qxd5 Qxd1+ Rf1 Qa1 g4 Qa5 b4 Qd8 Qxd8+ Rxd8 gxf5 d3 fxg6 d2 Rd1 Bc3 gxh7 Kxh7 Kg2 Bxb4 Kf3 Kg6 Ke2 Rh8 Bd3+ Kg5 Rg1+ Kf4 Rf1+ Ke5 Rf5+ Kd4 Rf4+ Kc3 Rc4+ Kb3
28   +0.22   01:23  49631K  Nd5 Qf2 f5 a4 Bg7 axb5 axb5 Rxa8 Rxa8 Bxb5 Qc5 Qe2 Qxc1 Qxe6+ Kh8 Qxd5 Qxd1+ Rf1 Qa1 g4 Qa5 b4 Qd8 Qxd8+ Rxd8 gxf5 d3 fxg6 d2 Rd1 Bc3 gxh7 Kxh7 Kg2 Bxb4 Kf3 Kg6 Ke2 Rh8 Bd3+ Kg5 Rg1+ Kh4 Bg6 Rd8 Rd1 Kh3 Ra1 Kxh2
29   +0.15   06:44 242779K  Rac8 Qe2 Nd5 a4 Bf4 Bd2 e5 axb5 axb5 Nf2 Bxd2 Qxd2 f5 Bxb5 e4 Nxe4 Qb6 Nd6 Qxd6 Qxd4 Qc5 Qxc5 Rxc5 Rb3 Kg7 Kg1 Rc2 Ra7+ Rf7 Rxf7+ Kxf7 Bd3 Rd2 Bc4 Kf6 g3 Ke6
30   +0.14   06:56 250318K  Rac8 Qe2 Nd5 a4 Bf4 Bd2 e5 axb5 axb5 Nf2 Bxd2 Qxd2 f5 Bxb5 e4 Nxe4 Qb6 Nd6 Qxd6 Qxd4 Qc5 Qxc5 Rxc5 Rb3 Rfc8 Kg1 Kf7 Bd7 Rc1+ Rxc1 Rxc1+ Kf2 Rc2+ Kf3 Kf6 Rb7 g5 h3 Rd2 Bc6 h5 Bxd5 Rd3+ Kf2 Rxd5
31   +0.19   07:22 265762K  Rac8 Qe2 Nd5 a4 Bf4 Bd2 e5 axb5 axb5 Nf2 Bxd2 Qxd2 f5 Bxb5 e4 Nxe4 Qb6 Nd6 Qxd6 Qxd4 Qc5 Qxc5 Rxc5 Rb3 Rfc8 Kg1 R8c7 Ba4 Kg7 Rd3 Ra5 Rda3 Nf6 Rd1 Rca7 Rd4
32   +0.16   07:29 269868K  Rac8 Qe2 Nd5 a4 Bf4 Bd2 e5 axb5 axb5 Nf2 Bxd2 Qxd2 f5 Bxb5 e4 Nxe4 Qb6 Nd6 Qxd6 Qxd4 Qc5 Qxc5 Rxc5 Rb3 Rfc8 Kg1 R8c7 Ba4 Kg7 Rd3 Nb6 Bb3 Nc4 Ra8 Nxb2 Rg8+ Kf6 Rf8+ Kg5
33   +0.09   09:13 332712K  Rac8 Qe2 Nd5 a4 Bf4 Bd2 e5 axb5 axb5 Nf2 Bxd2 Qxd2 f5 Bxb5 e4 Nxe4 Qb6 Nd6 Qxd6 Rd3 Qe5 Rxd4 Nf6 Ba6 Rc5 b4 Rc6 b5 Ne4 Qa2+ Re6 Rc1 Re8 Rd5 Qg7 Rc6 Rxc6 bxc6
34   +0.09   09:25 339695K  Rac8 Qe2 Nd5 a4 Bf4 Bd2 e5 axb5 axb5 Nf2 Bxd2 Qxd2 f5 Bxb5 e4 Nxe4 Qb6 Nd6 Qxd6 Rd3 Qe5 Rxd4 Nf6 Bc4+ Kh8 Ra5 Qe7 b3 Rfd8 h3 Ne4 Qb2 Qg7 Rxd8+ Rxd8 Qa1 Nd2 Kg1 Qxa1+ Rxa1 Ne4 Be6
35   +0.16   12:15 442582K  Rac8 Qe2 Nd5 a4 Bf4 Bd2 e5 axb5 axb5 Nf2 Bxd2 Qxd2 f5 Bxb5 e4 Nxe4 Qb6 Nd6 Qxd6 Rd3 Qe5 Rxd4 Nf6 Bc4+ Kh8 Ra5 Qe7 b3 Rcd8 Rxd8 Rxd8 Qc1 Ne4 Qa1+ Qg7 h3 Nd2 Qxg7+ Kxg7 Ra7+ Kh6
36   +0.16   14:14 514988K  Rac8 Qe2 Nd5 a4 Bf4 Bd2 e5 axb5 axb5 Nf2 Bxd2 Qxd2 f5 Bxb5 e4 Nxe4 Qb6 Nd6 Qxd6 Rd3 Qe5 Rxd4 Nf6 Bc4+ Kh8 Ra5 Qc7 b3 Rcd8 Ra6 Ne4 Rxd8 Rxd8 Qb2+ Qg7 Qxg7+ Kxg7 Ra7+ Kh6 h3 Rb8 Kh2 Nd2 Kg1 Rb4 Rc7 Nxb3
37   +0.19   17:52 646783K  Rac8 Qe2 Nd5 a4 Bf4 Bd2 e5 axb5 axb5 Nf2 Bxd2 Qxd2 f5 Bxb5 e4 Nxe4 Qb6 Nd6 Qxd6 Rd3 Qe5 Rxd4 Nf6 Bc4+ Kh8 Ra5 Qe7 b3 Rcd8 Rxd8 Rxd8 Qc1 Ne4 Qa1+ Qg7 h3 Qxa1+ Rxa1 Nd2 Kh2 Kg7 Ra5 Kh6 Rd5 Rxd5 Bxd5 Ne4 Kg1 Kg5
38   +0.14   19:44 715190K  Rac8 Qe2 Nd5 a4 Bf4 Bd2 e5 axb5 axb5 Nf2 Bxd2 Qxd2 f5 Bxb5 e4 Nxe4 Qb6 Nd6 Qxd6 Rd3 Qe5 Rxd4 Nf6 Bc4+ Kh8 Ra5 Qe7 b3 Rcd8 Rxd8 Rxd8 Qc1 Ne4 Qa1+ Qg7 h3 Qxa1+ Rxa1 Nd2 Kh2 Kg7 Ra7+ Kh6 Rc7 Ne4 Kg1 Rd1+ Kh2 Rb1 Ra7
39   +0.09 1:09:20   2544M  Rac8 Qe2 Nd5 Nf2 f5 a4 Bf4 Bxf4 Nxf4 Rxf4 Qxf4 Qxe6+ Kg7 Kg1 bxa4 Rxa4 Rc1+ Bf1 Rc2 Nd1 Rf6 Qe8 Rd2 Qe1 Re6 Qxe6 Rxd1 Qe2 Qe3+ Qf2 Rd2 Qxe3 dxe3 Rxa6 e2 Ra7+ Kf6 Bxe2 Rxe2 b4 h6 Ra6+ Kg5 Rb6 Rb2 g3 Kh5 h3 g5 Rf6 f4 gxf4 Rxb4 fxg5 Kxg5 Rf3 Kh4 Rf1 Rb2
40   +0.03 2:01:01   4478M  Rac8 Qe2 Nd5 Bh6 Bg7 Bd2 f5 g4 Rce8 Nf2 Ne3 a4 Kh8 axb5 axb5 Bxe3 Qd5 Bxd4 Bxd4 Rf1 Bxf2 gxf5 Bd4 fxg6 Rxf3 Qxf3 Qxf3+ Rxf3 hxg6 b4 Rd8 Bxb5 Rb8 Bd3 Rxb4 Rg3 Rb2 Rxg6 Rd2 Be4 e5 Rg3 Re2 Bd3 Re1+ Kg2 e4 Bc4 Rg1+ Kh3 Rxg3+ hxg3 Kg7
Nodes: 6652037654
Nodes/second: 615916
Best move: Rac8
Ponder move: Qe2

Searching:
r4rk1/ppp2ppp/1nnb4/8/1P1P3q/PBN1B2P/4bPP1/R2QR1K1 w - - 0 1

infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0

1   +1.22   00:00      41  Rxe2
2   +1.12   00:00     123  Qxe2 a5
3   +0.93   00:00     263  Rxe2 Rad8 Rd2
4   +0.79   00:00     367  Rxe2 Ne7 Qc2 a5
5   +0.67   00:00     616  Rxe2 Rad8 Rd2 Bf4 Qf3 Bxe3 fxe3
6   +0.62   00:00     873  Rxe2 Rad8 Rb2 Bf4 Qf3 Bh6
7   +0.57   00:00    1478  Rxe2 Rad8 Rc1 Be5 d5 Nc4 Bxc4
8   +0.57   00:00    2261  Rxe2 Rad8 Rd2 Bf4 Qf3 Bxe3 fxe3 Qe7
9   +0.64   00:00    3164  Rxe2 Rad8 Rd2 Bf4 Qe2 a5 b5 Ne7 Qf3 Bxe3
10   +0.81   00:00    5504  Rxe2 Rad8 Rc1 a5 d5 axb4 axb4 Nxb4 Nb5 Bf4 Bxf4
11   +0.64   00:00    7322  Rxe2 Rad8 Rc1 a5 Nb5 axb4 axb4 Bf4 Rc5 Bxe3 fxe3 Qg3 e4
12   +0.59   00:00   24798  Rxe2 Rad8 Nb5 Be5 Rd2 Bf4 Qf3 Bxe3 fxe3 Qg5 Nc3 Qe7 Rd3 Kh8 Rf1 f5 Qg3
13   +0.73   00:00   33841  Rxe2 Rad8 Rd2 Bf4 Rd3 Bxe3 fxe3 Rd6 Qd2 Rfd8 Rf1 Rf6 Rxf6 Qxf6 Ne4
14   +0.76   00:00   75819  Rxe2 Rad8 Rd2 Bf4 Rd3 Rd7 Ra2 Qh6 Re2 Bxe3 fxe3 Re8 e4 Red8 Red2 Re7
15   +0.63   00:00   98866  Rxe2 Rad8 Rd2 Bf4 Rd3 Kh8 d5 Bxe3 Rxe3 f5 Nb5 f4 Rc3 Ne5 Qd4 Qf6 Rxc7 f3
16   +0.57   00:01  322323  Rxe2 Rad8 Rd2 Bf4 Rd3 Bxe3 fxe3 Nd7 Nd5 Nb6 Nxc7 Qg5 Qg4 Qxg4 hxg4 Rd7 Ne6 fxe6 Bxe6+ Kh8 Bxd7 Nxd7 Rf1 Rxf1+ Kxf1 Nf6 g5 Ne4
17   +0.58   00:01  498409  Rxe2 Rad8 Rd2 Bf4 Qf3 Bxe3 fxe3 Qe7 Rd3 Kh8 Rad1 f5 Na4 Nxa4 Bxa4 Rd6 Rc3 Rff6 Rf1 f4 Bxc6 bxc6 exf4 Rxd4 Rxc6 Rdxf4 Qxf4 Rxc6
18   +0.64   00:01  631165  Rxe2 Rad8 Rd2 Bf4 Rd3 Kh8 Rc1 Bxe3 fxe3 Rd6 Qd2 a6 Rf1 f5 e4 Qd8 Rd1 fxe4 Nxe4 Rg6
19   +0.58   00:03   1348K  Rxe2 Rad8 d5 Ne7 Qd2 Nc4 Qd4 Qxd4 Bxd4 Nb6 Nb5 Nf5 Bb2 Rfe8 Rc2 a6 Nxd6 cxd6 g3 Re7 Rac1 Rde8
20   +0.60   00:07   3488K  Rxe2 Rad8 d5 Ne7 Qd2 Nc4 Qd4 Qxd4 Bxd4 Nb6 Nb5 Nf5 Bb2 Rfe8 Rae1 Rxe2 Rxe2 a6 Nxd6 Nxd6 a4 f6 a5 Nbc4
21   +0.59   00:09   4571K  Rxe2 Rad8 d5 Ne7 Qd3 Ng6 Rae1 a6 Qf5 Nf4 Bxf4 Qxf4 Qxf4 Bxf4 g3 Bh6 Kh2 Kh8 f4 g6 Re7 Bg7 Rxc7 Bxc3 Rxc3 Nxd5 Rc5
22   +0.56   00:14   6922K  Rxe2 Rad8 Rc1 a6 d5 Ne5 Qd4 Qxd4 Bxd4 Nd3 Rd1 Nf4 Re3 f5 Ne2 Nxe2+ Rxe2 f4 f3 Rf5 Bc3 Rg5 Kf2 Kf7 Re6
23   +0.58   00:18   9248K  Rxe2 Rad8 d5 Ne7 Qc2 Qh5 Rd1 Nf5 Bc5 Rfe8 Re4 Be5 Nb5 Nd6 Bxd6 cxd6 Nxa7 Qg6 Ree1 Qxc2 Bxc2 Bf4 Rxe8+ Rxe8 Nb5 Re2 Bd3 Ra2
24   +0.80   00:27  15045K  Rxe2 Rad8 d5 Ne7 Qd2 Nc4 Qd4 Qxd4 Bxd4 Nb6 Nb5 Nf5 Bb2 a6 Nxd6 Rxd6 Rae1 g6 Re5 h5 a4 Rfd8 g4 Nh4 Re8+ Kh7 R1e7 Rxe8
25   +0.74   00:28  15695K  Rxe2 Rad8 d5 Ne7 Qd2 Nc4 Qd4 Qxd4 Bxd4 Nb6 Nb5 Nf5 Bb2 Bf4 g3 a6 Nd4 Nxd4 Bxd4 Nxd5 Rae1 Nxb4 Bc5 Nd3 Bxf8 Nxe1 Rxe1 Kxf8 gxf4 Rd3 Re3 Rd4 Rf3 Ke7 Kg2 g6
26   +0.68   00:36  20544K  Rxe2 Rad8 d5 Ne7 Qd2 Nc4 Qd4 Qxd4 Bxd4 Nb6 Nb5 Nf5 Bb2 Bf4 g3 a6 Nd4 Nxd4 Bxd4 Bd6 Rae1 Nd7 Bc3 a5 bxa5 Bxa3 Bc4 Ra8 Rb1 Rfb8 Ree1 Bd6 Kg2
27   +0.67   00:55  31499K  Rxe2 Rad8 d5 Ne7 Qd2 Nc4 Qd4 Qxd4 Bxd4 Nb6 Rd1 Nf5 Bc5 Rfe8 Rxe8+ Rxe8 Nb5 Nc8 Bc2 Nh4 Be3 a6 Nxd6 Nxd6 Rc1 Nhf5 Bxf5 Nxf5 Rxc7 Nxe3 fxe3 Rxe3 Rxb7 Rxa3
28   +0.58   01:33  54039K  Rxe2 Rad8 d5 Ne5 Qd4 Qh5 f4 Ng6 Rf1 Rfe8 Rfe1 Rf8 Kh2 Nh4 Qd3 c6 Rf2 Qf5 Qd2 Nxd5 Nxd5 cxd5 g3 Ng6 Bxa7 Ra8 Bc5 Bxc5 bxc5 Rxa3
29   +0.83   03:36 126865K  Rxe2 Rad8 Rc1 Qh5 Re1 Qxd1 Rcxd1 Ne7 Ne4 Rde8 Rc1 Nf5 Nxd6 cxd6 Rc7 Re7 Rxe7 Nxe7 d5 Nf5 Bxb6 axb6 Bc4 Ra8 Bd3 g6 Bxf5 gxf5 Re7 Rxa3 Rxb7 Rd3 Kf1 Kf8 Ke2 Rxd5 Rxb6 Ke7 Rb7+ Ke6
30   +0.72   05:25 192629K  Rxe2 Rad8 Rc1 Rd7 Re1 Bf4 Qf3 Bxe3 fxe3 a5 b5 Nd8 Ne4 Re8 Nc5 Rd6 Qf2 Qxf2+ Kxf2 Rf6+ Kg1 Rd6 Nd3 c6 bxc6 Nxc6 Nc5 Re7 Kh2 h5 Ba2 Nd8 g3 Nd7 Nxd7 Rexd7 Kg2
31   +0.72   05:34 197890K  Rxe2 Rad8 Rc1 Rd7 Re1 Bf4 Qf3 Bxe3 fxe3 a5 b5 Nd8 Ne4 Re8 Nc5 Rd6 Qf2 Qxf2+ Kxf2 Rf6+ Kg1 Rd6 Nd3 c6 bxc6 Nxc6 Nc5 Re7 Kh2 h5 Ba2 Nd8 g3 Nd7 Nxd7 Rexd7 Kg2 Rc6 Rxc6 bxc6 Bb3 Ne6 Rf1 g6
32   +0.77   10:56 386975K  Rxe2 Rad8 Rc1 Rd7 Re1 Bf4 Qf3 Bxe3 fxe3 a5 b5 Nd8 Ne4 Re8 Nc5 Rd6 Qf2 Qxf2+ Kxf2 Rf6+ Kg1 Rd6 g3 Nd7 Nxd7 Rxd7 Kf2 b6 a4 g6 Rc3 Nb7 Rec1 Ree7 Bd1 Nd6 Bf3 Nf5
33   +0.65   11:43 414655K  Rxe2 Rad8 Rc1 Rd7 Re1 Bf4 Qf3 Bxe3 fxe3 a5 b5 Nd8 a4 Re8 Ne2 Qe7 Nf4 c6 Qf1 Qb4 Rb1 Qd2 Re2 Qc3 Bc2 c5 Rc1 Qa3 Bf5 Ne6 Bxe6 fxe6 dxc5 Nxa4 Ra1
34   +0.71   13:47 489910K  Rxe2 Rad8 Rc1 Rd7 Re1 Bf4 Qf3 Bxe3 fxe3 a5 b5 Nd8 a4 Re8 Ne2 Qe7 Nf4 c6 bxc6 Nxc6 Nd3 Rd6 Qg3 Rg6 Qf2 Rd6 Nc5 Rg6 Qb2 Rd8 Rf1 Rf6 Bxf7+ Rxf7 Rxf7 Qxe3+ Rf2
35   +0.74   18:15 652486K  Qxe2 Nxd4 Bxd4 Qxd4 Ne4 Qe5 Nxd6 Qxe2 Rxe2 cxd6 Re7 Rab8 Rc1 d5 Rcc7 g6 a4 Kg7 Rxb7 Nc4 f3 Kf6 Rec7 Rxb7 Rxb7 a5 bxa5 Nxa5 Rb6+ Ke5 Bxd5 Kxd5 Rb5+ Ke6 Rxa5 Rc8 Ra6+ Ke5 Ra7 Ke6 Kf2 Rc2+ Kg3 h5 a5 g5 h4 gxh4+ Kh3 Ra2 f4 Kf6 Kxh4 Rxg2 Kxh5 Ra2 a6
36   +0.82   41:40   1489M  Qxe2 Nxd4 Bxd4 Qxd4 Ne4 Rad8 Rad1 Qe5 Nxd6 Qxe2 Rxe2 Rxd6 Rxd6 cxd6 Re7 Rb8 Rxf7 Rc8 Rxb7+ d5 Rxa7 Rc3 Ba2 Rc2 Rb7 Rxa2 Rxb6 Rxa3 Kf1 Ra2 Rd6 Rb2 Rxd5 Rxb4 Rd7 h5 Ke2 g6 Rc7 Rb2+ Ke3 Rb4 Ra7 Rb2 Kf3 Kf8 Rd7 Kg8 h4 Rb3+ Kf4 Rb4+ Kg3 Rg4+ Kh3 Rb4
37   +0.82   42:25   1516M  Qxe2 Nxd4 Bxd4 Qxd4 Ne4 Qe5 Nxd6 Qxe2 Rxe2 cxd6 Re7 Rab8 Rc1 d5 Rcc7 g6 a4 Nc4 Rxb7 Kg7 Bxc4 dxc4 Kf1 c3 Ke2 Rxb7 Rxb7 Rd8 Rxa7 Rd4 b5 c2 Rc7 Rxa4 Rxc2 Rb4 Rc5 Kf6 Kd3 Ke6 Kc3 Rb1 Rc6+ Ke5 Kc4 Rb2 b6 Rc2+ Kb5 Rxf2 Rc5+ Kd6
38   +0.85   47:54   1717M  Qxe2 Nxd4 Bxd4 Qxd4 Ne4 Rad8 Rad1 Qe5 Nxd6 Qxe2 Rxe2 Rxd6 Rxd6 cxd6 Re7 Rb8 Rxf7 Rc8 Rxb7+ d5 Rxa7 Rc3 Ba2 Rc2 Rb7 Rxa2 Rxb6 Rxa3 Kf1 Ra2 g3 Rb2 Kg2 Rb3 Rd6 Rxb4 Rxd5 Kf7 g4 Kf6 Rd6+ Kf7 Rd7+ Kf6 Ra7 Rb5 h4 Rb3 Ra5 Rb7 Rh5 h6
39   +0.86   50:15   1803M  Qxe2 Nxd4 Bxd4 Qxd4 Ne4 Qe5 Nxd6 Qxe2 Rxe2 cxd6 Re7 Rab8 Rc1 d5 Rcc7 g6 a4 Nc4 Rxb7 Kg7 Bxc4 dxc4 Kf1 c3 Ke2 Rxb7 Rxb7 Rd8 Rxa7 Rd4 b5 c2 Rc7 Rxa4 Rxc2 Rb4 Rc5 Kf6 Kd3 Ke6 Kc3 Rb1 g3 Kd6 Rc6+ Kd5 Rf6 Rxb5 Rxf7
40   +0.77 1:03:32   2297M  Qxe2 Nxd4 Bxd4 Qxd4 Ne4 Rae8 Rad1 Qe5 g3 Be7 Qf3 Qb5 Kg2 Qc6 Re3 Nc4 Bxc4 Qxc4 Rc3 Qe6 Rxc7 Bxb4 axb4 Qxe4 Qxe4 Rxe4 Rxb7 a6 Rd6 Re6 Rxe6 fxe6 Re7 Rb8 Rxe6 Rxb4 Rxa6 Kf7 h4 Ke7 Ra7+ Kf6 Ra3 h6 Kf3 Kg6 Ra5 Rb3+ Ke4 Rb4+ Ke5 Rb2 f3 Rb3 Ra6+ Kf7 Ke4 Rb4+ Kf5 Rb5+ Kf4
41   +0.82 1:13:48   2666M  Qxe2 Nxd4 Bxd4 Qxd4 Ne4 Rae8 Rad1 Qe5 g3 Be7 Qf3 Qb5 Kg2 Qc6 Re3 Nc4 Bxc4 Qxc4 Rc3 Qe6 Rxc7 Bxb4 axb4 Qxe4 Qxe4 Rxe4 Rxb7 a6 Rd6 Re6 Rxe6 fxe6 Re7 Rb8 Rxe6 Rxb4 Rxa6 Kf7 h4 Ke7 Ra7+ Kf6 Ra3 h6 Kf3 Rb6 h5 Rb2 g4 Rb6 Ra4 Kg5 Kg3 Rb3+ f3 Kf6 Ra6+ Kg5
42   +0.82 1:29:15   3170M  Qxe2 Nxd4 Bxd4 Qxd4 Ne4 Rae8 Rad1 Qe5 g3 Be7 Qf3 Qb5 Kg2 Qc6 Re3 Nc4 Bxc4 Qxc4 Rc3 Qe6 Rxc7 Bxb4 axb4 Qxe4 Qxe4 Rxe4 Rxb7 a6 Rd6 Re6 Rxe6 fxe6 Rb6 Ra8 Rxe6 a5 bxa5 Rxa5 Re7 h5 h4 Kh7 Re6 Kg8 Kf3 Kf7 Rd6 Ke7 Rb6 Kf7 Rb4 Kf6 Kf4 Ke6 Rb6+ Kf7 Rb4 Ra2 Rb7+ Kf6
43   +0.85 2:01:50   4285M  Qxe2 a5 Nb5 axb4 Nxd6 cxd6 Qb5 Nc8 axb4 Rxa1 Rxa1 Nxd4 Qc4 Nf5 Qxh4 Nxh4 Ra5 b6 Rb5 g6 Bxb6 Nxb6 Rxb6 Nf5 Rb7 Kg7 b5 Kf6 Rd7 Rb8 Rxf7+ Ke5 Bc4 d5 Bd3 Kd4 Bf1 Rh8 Rd7 Kc5 f3 Nd6 Be2 Nxb5 Bxb5 Kxb5 Rxd5+ Kc6 Rd2 Rb8 Kf2 Kc7 Ke3 Rb3+ Ke4 Kc6



Komodo:

Analysis of X:\users\dcorbit\PeterGrayson.epd  
2/9/2016 6:28:23 PM Level: 16200 Seconds
Analyzing engine: Komodo-9.02-64bit

1                     
    Avoid move:
    Best move (Komodo-9.02-64bit): Nf6-d5
    Not found in: 4:30:00
      2  00:00           608  19,486  +5.06  Rac8 Bh6 Rxc2
      3  00:00         2,066  66,216  +0.61  Rac8 Qe2 Ng4
      3  00:00         2,648  84,869  +0.64  Bxh2 g3 Ng4 Bf4
      4  00:00         3,914  125,445  +0.95  Bxh2 g3 Qd5 Qg2 Ng4
      5-  00:00         4,226  135,445  +0.86  Bxh2 g3
      5-  00:00         4,912  157,431  +0.77  Bxh2 g3
      5  00:00         6,270  200,956  +0.77  Bxh2 g3 Qd5 Qg2 Ng4 Bf4
      6  00:00         7,739  248,038  +0.83  Bxh2 g3 Qd5 Qg2 Ng4 Bf4 Rac8
      7-  00:00        10,046  321,978  +0.76  Bxh2 Rxf6
      7-  00:00     2,276,663  9,729,079  -0.01  Bxh2 Rxf6
      7-  00:00     2,277,448  9,732,434  +0.14  Rac8
      7-  00:00     2,277,621  9,733,173  +0.40  Ng4
      7  00:00     2,279,515  9,741,267  +0.36  Ng4 g3 f5 h3 Qd5 Qe2 Nf6
      8-  00:00     2,286,668  9,771,834  +0.29  Ng4 Nf2
      8-  00:00     4,599,358  10,529,395  +0.22  Ng4 Nf2
      8+  00:00     4,603,100  10,537,962  +0.33  Ng4
      8-  00:00     4,604,012  10,540,050  +0.19  Ng4 Nf2
      8-  00:00     4,613,048  10,560,736  +0.20  Nd5 Qe2
      8  00:00     4,621,359  10,579,763  +0.25  Nd5 Qf2 f5 a4 Nf6 axb5 Ng4 Qh4
      8+  00:00     4,622,026  10,581,290  +0.34  Ng4
      8-  00:00     4,623,762  10,585,264  +0.16  Ng4 Nf2
      8  00:00     4,627,633  10,594,126  +0.14  Ng4 Nf2 Nxh2 Rh3 f5 Bh6 Rfc8 Qd1
      8  00:00     4,630,988  10,601,806  +0.25  Nd5 Qf2 f5 a4 Nf6 axb5 Ng4 Qh4
      9-  00:00     7,803,408  10,874,035  +0.18  Nd5 Qe2
      9+  00:00     7,805,632  10,877,134  +0.38  Ng4
      9  00:00     7,809,353  10,882,319  +0.35  Ng4 Nf2 Nxh2 Rh3 f5 Bh6 Rfc8 Qd1 Ra7 Qe1
     10-  00:00     7,832,215  10,681,961  +0.28  Ng4 g3
     10  00:00     7,885,081  10,530,019  +0.23  Ng4 g3 f5 Nf2 Qd5 Qe2 Bf6 Bf4 Ne5 Bxe5
     11  00:01     9,890,643  9,906,239  +0.23  Ng4 h3 Nh2 Rf2 Bg3 Bh6 Rfc8 Qd2 Bxf2 Qxf2 f5 Bf4
     12  00:01    12,185,773  10,014,349  +0.26  Ng4 Nf2 Nxh2 Rh3 f5 Qe2 h5 Bg5 Ng4 Nxg4 fxg4 Rh4 Bg3
     13-  00:01    13,780,830  8,333,621  +0.19  Ng4 Nf2
     13-  00:01    13,783,561  8,335,273  +0.11  Ng4 Nf2
     13  00:02    13,826,890  8,283,330  +0.15  Nd5 a4 Nb4 Qe2 Nxd3 Qxd3 f5 Bg5 Rfb8 b3 Rc8 h3 Qd5 axb5 axb5
     14+  00:02    14,448,761  7,848,973  +0.22  Nd5
     14-  00:02    16,604,014  6,866,661  +0.15  Nd5 Qf2
     14  00:02    16,630,273  6,877,521  +0.10  Nd5 Qf2 f5 a4 Rfc8 Bg5 Bg7 axb5 axb5 Rxa8 Rxa8 Bxb5 Bf6 Bxf6 Nxf6 Qh4 Ne4 Kg1 Ra1
     15+  00:02    16,926,616  6,739,202  +0.17  Nd5
     15  00:02    17,294,816  6,559,843  +0.19  Nd5 Qf2 f5 a4 Rfc8 b3 Bf6 Bb2 Nb4 Be4 Rab8 axb5 Qe5 Bd3 Nxd3 Rxd3 Qxb5
     16+  00:03    20,448,379  5,799,822  +0.26  Nd5
     16  00:03    21,887,389  5,523,629  +0.26  Nd5 a4 f5 Bh6 Bg7 Bxg7 Kxg7 axb5 axb5 Rc1 e5 Bxb5 e4 Rb3 Nf6 Rh3 e3 Nxe3 dxe3 Rxe3
     17-  00:05    26,966,554  5,039,594  +0.19  Nd5 Bh6
     17+  00:06    29,888,568  4,937,847  +0.26  Nd5
     17  00:06    29,895,108  4,938,927  +0.26  Nd5 a4 f5 g3 Nb4 Qg2 Rfc8 axb5 axb5 Rxa8 Rxa8 Rf1 Rc8 Nf2 Nxd3 Nxd3 Bf6 Qb7 Qc6+
     18-  00:07    35,807,975  4,655,829  +0.19  Nd5 a4
     18  00:09    40,287,637  4,499,084  +0.19  Nd5 Qf2 f5 Bh6 Rfc8 a4 Nb6 axb5 axb5 Rxa8 Rxa8 Bxb5 Ra1 Qe1 Bg7 Bxg7 Kxg7 b4 e5 Rh3 Qd5
     19  00:14    59,517,576  4,192,452  +0.25  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Qg5 Qe5 Nf2 Qf4 Qxf4 Nxf4 Rf3 d2 Rxf4 Rac8 Nd3 Rcd8
     20-  00:15    65,309,760  4,132,690  +0.18  Nd5 Qf2
     20+  00:22    90,150,947  4,029,817  +0.25  Nd5
     20  00:22    90,330,535  4,029,415  +0.26  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Qg5 Qf4 Re3+ Kd7 Qxf4 Nxf4 g3 Ne6 Rxd3+ Ke7 Nc3 Rfd8 Re3 Kf7
     21-  00:23    93,307,650  4,030,395  +0.19  Nd5 Qf2
     21+  00:30   121,748,339  3,998,043  +0.26  Nd5
     21  00:38   152,855,446  3,973,306  +0.29  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rg3 Kd7 Rxd3 Rh8 Qg3 Qxg3 Rxg3 Nf4 Nf2 Rae8 Nd3 Nxd3 Rxd3+ Ke7 Rad1 Rd8
     22-  00:44   176,551,128  3,957,024  +0.22  Nd5 Qf2
     22+  00:53   209,743,926  3,945,064  +0.29  Nd5
     22-  00:56   221,240,097  3,938,265  +0.22  Nd5 Bh6
     22+  01:08   268,641,175  3,923,478  +0.30  Nd5
     22-  01:09   270,886,198  3,922,307  +0.18  Nd5 Qf2
     22  01:11   278,401,552  3,917,847  +0.16  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 Qg1 Qe6 Nc3 Nxc3 Rxc3 Rae8 a4 Re7 axb5 axb5 h3 Rd8
     23+  01:17   302,677,043  3,923,534  +0.23  Nd5
     23  01:30   363,417,026  4,036,625  +0.24  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Qd2 Nf6 Nf2 Rhe8 Rd1 Kg7 Kg1 Qe2 Qc3 Qe5 Qxe5
     24  01:48   433,965,441  4,021,044  +0.24  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Qd2 Nf6 Nf2 Rhe8 Rd1 Kg7 Kg1 Qe2 Qc3 Qe5 Qxe5 Rxe5 Rc1
     25-  02:01   486,409,340  4,017,431  +0.17  Nd5 Qf2
     25  02:26   585,891,755  3,999,169  +0.19  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Nf2 Rhd8 Qxe7+ Nxe7 Rad1 Nc6 Kh2 Ke7 Rxd8 Rxd8 Rxd8 Nxd8 Nd3 a5 Kg3 Ne6
     26  02:56   705,359,664  3,995,246  +0.17  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Qxe7+ Nxe7 Nf2 Rhd8 Rad1 Nc6 Kh2 Rxd3 Nxd3 Rd8 Rc1 Rxd3 Rxc6 Rd2 Rxa6 Rxb2
     27  06:23  1,510,284,201  3,941,799  +0.11  Nd5 Qf2 f5 Bh6 Rfe8 a4 Bg7 Bxg7 Kxg7 axb5 axb5 Qxd4+ e5 Rxa8 Rxa8 Qg1 e4 Bxe4 fxe4 Qd4+ Kg8 Qxe4 Nc7 Rf1 Re8 Qf3 Rf8 Qxf8+ Qxf8 Rxf8+ Kxf8 Kg1 Ke7 Kf2 Ke6 Nc3 b4 Ne4 Ke5 Kf3
     28  07:19  1,736,100,362  3,948,959  +0.13  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Qd2 Nf6 Nc3 Rad8 Rd1 Rxd3 Qxd3 Qe5 a4 Kg7 axb5 axb5 Ra1 b4 Ra7+ Kh6 Qd2+ g5 Ne2 Ne4 Qd4
     29+  13:35  3,235,376,955  3,965,404  +0.20  Nd5
     29-  14:53  3,551,648,438  3,975,135  +0.13  Nd5 Qf2
     29-  26:20  6,276,963,888  3,971,877  +0.03  Nd5 Qf2
     29+  1:00:09  14,411,368,508  3,992,609  +0.11  Nd5
     29  1:00:49  14,569,385,018  3,992,557  +0.16  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Qd2 Nf6 Nc3 Rad8 Rd1 Rxd3 Qxd3 Qe5 a4 Rb8 axb5 axb5 Ra1 Rb7 Ra5 Rd7 Qf1 Kg7 Rxb5 Qe3
     30  1:08:17  16,348,287,550  3,990,116  +0.16  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Nc3 Qxe1+ Rxe1 Nf6 Rd6 b4 Nd5 Nxd5 Rxd5 Rhd8 Rde5 Re8 Rxe8 Rxe8 Rxe8 Kxe8 g3 Kf7 Kg2 Kf6 Kf3 Ke5 g4 a5 b3 Ke6
     31  1:43:56  24,983,468,621  4,006,152  +0.21  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Nc3 Qxe1+ Rxe1 Nf6 Rd6 b4 Nd5 Nxd5 Rxd5 Rad8 Ra5 Rd6 Kh2 Kf6 Re2 Rh4 Rae5 Kg5 Re6 Rhd4 R2e5 Rxe6
     32-  1:47:19  25,828,345,232  4,010,611  +0.14  Nd5 Qf2
     32-  2:02:23  29,493,352,848  4,016,159  +0.07  Nd5 Qf2
     32+  2:39:01  38,451,989,482  4,029,735  +0.14  Nd5
     32  2:52:48  41,841,308,949  4,035,215  +0.11  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Nf2 Rad8 Qd2 Nb4 Rxd8 Rxd8 Qh6 Qf6 Re1 Kg8 Qe3 Nd5 Qg3 Qd6 Qh4 Nf6 Qh6 Kf7 Rd1 Qf8 Qxf8+ Rxf8 Rd6 Ne4 Nxe4 fxe4
     33  3:12:31  46,745,884,978  4,046,746  +0.13  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Nf2 Rad8 Qxe7+ Nxe7 Rad1 Rxd3 Nxd3 Rc8 Ne5+ Ke6 Nf3 Nd5 Ng5+ Kd6 Nf7+ Ke7 Ne5 Nf4 g3 Nxh3 Nxg6+ Kf7 Rd6 Rc2 Ne5+ Kg7 Rg6+ Kh7 Rxa6 Rxb2 Nf3
     34  3:55:15  57,357,617,301  4,063,254  +0.10  Nd5 Qf2 f5 Bh6 Bg7 Bxg7 Kxg7 Qxd4+ e5 Qh4 e4 Rh3 exd3 Qxh7+ Kf6 Qh4+ Ke6 Rxd3 Rh8 Qe1+ Kf7 h3 Qe7 Qd2 Nf6 Nc3 Rad8 Rd1 Rxd3 Qxd3 Qe5 Qd6 Qxd6 Rxd6 Ra8 Kh2 b4 Nd5 Nxd5 Rxd5 Re8 Kg3 Re2 Rd7+ Ke6 Ra7 Rxb2 Rxa6+ Ke5 Kf3
   2/9/2016 10:58:27 PM, Time for this analysis: 04:30:00, Rated time: 4:30:00

2                     
    Avoid move:
    Best move (Komodo-9.02-64bit): Re1xe2
    Not found in: 4:30:00
      2  00:00           932  932,000  +0.61  Rxe2 Rad8
      2  00:00         1,217  1,217,000  +0.72  Nxe2 Qf6
      3  00:00         3,066  196,528  +0.90  Nxe2 a6 d5 Ne5
      3  00:00         3,541  226,975  +1.09  Rxe2 Bf4 Bxf4 Qxf4
      4  00:00         6,454  413,696  +1.21  Rxe2 Rac8 Qd3 Rce8
      5-  00:00         7,208  231,013  +1.14  Rxe2 g6
      5-  00:00         7,464  239,218  +1.03  Rxe2 g6
      5  00:00         8,930  286,203  +1.01  Rxe2 g6 Re1 Rad8 Rc1
      6  00:00        12,425  398,216  +1.02  Rxe2 g6 Nb5 Rad8 Nxd6 Rxd6 d5
      7  00:00        18,083  579,553  +0.97  Rxe2 g6 Qd3 a5 b5 a4 Nxa4 Nxa4
      8-  00:00        25,768  825,855  +0.90  Rxe2 a5
      8-  00:00        29,388  627,916  +0.83  Rxe2 a5
      8  00:00        41,256  881,493  +0.87  Rxe2 Rfd8 Re1 a5 Qf3 axb4 axb4 Qe7 Rxa8
      9-  00:00        52,409  1,119,793  +0.80  Rxe2 a5
      9+  00:00        78,680  1,260,832  +0.87  Rxe2
      9  00:00        84,198  1,349,257  +0.81  Rxe2 Ne7 Qc2 a5 bxa5 Rxa5 Ne4 Nbd5 Bg5 Qh5 Nxd6
     10+  00:00       123,954  1,589,072  +0.88  Rxe2
     10-  00:00       139,398  1,787,062  +0.81  Rxe2 Ne7
     10  00:00       149,716  1,919,337  +0.81  Rxe2 Ne7 Qc2 a5 bxa5 Rxa5 Ne4 Nbd5 Bg5 Qh5 Nxd6 Qxg5 Nxb7
     11-  00:00       211,522  1,936,915  +0.74  Rxe2 Rad8
     11-  00:00       257,268  2,061,336  +0.67  Rxe2 Rad8
     11+  00:00       341,437  2,431,762  +0.74  Rxe2
     11  00:00       418,784  2,684,375  +0.79  Rxe2 Rad8 Rd2 a6 Qe2 a5 Qb5 Ra8 Bg5 Qh5 Bd1 Qg6 Bc2
     12-  00:00     3,277,876  6,777,725  +0.72  Rxe2 Rad8
     12-  00:00     3,285,892  6,794,300  +0.65  Rxe2 Rad8
     12  00:00     3,291,764  6,806,441  +0.64  Rxe2 Rad8 Rd2 a6 Qe2 Rd7 Re1 Re8 Qg4 Qxg4 hxg4 Bf4 Rde2 Bxe3
     13+  00:00     3,826,879  5,982,931  +0.71  Rxe2
     13+  00:00     3,880,738  5,922,678  +0.78  Rxe2
     13  00:01     8,247,852  7,342,796  +0.85  Rxe2 Rad8 Rc1 Be5 d5 Rfe8 Rd2 Ne7 d6 Rxd6 Rxd6 cxd6 Nb5 Nf5 Bxb6 axb6
     14-  00:01     8,388,613  6,557,366  +0.78  Rxe2 Rad8
     14  00:01     8,707,271  6,271,121  +0.73  Rxe2 Rad8 Rd2 Ne7 Qf3 c6 d5 Nexd5 Nxd5 Nxd5 Bxd5 cxd5 Rxd5 h6 Rad1 Qe7 Qg4 Be5 Bxh6
     15-  00:02    14,609,164  4,928,614  +0.66  Rxe2 Rad8
     15+  00:03    14,699,699  4,907,500  +0.73  Rxe2
     15-  00:03    15,049,212  4,871,937  +0.66  Rxe2 Rad8
     15+  00:03    15,169,091  4,861,638  +0.74  Rxe2
     15  00:03    17,920,786  4,669,550  +0.64  Rxe2 Rad8 Rd2 h6 Rc1 Ne7 Qf3 c6 d5 Nexd5 Bxd5 Nxd5 Nxd5 cxd5 Rxd5 Qe7 Bxa7 Rc8 Rdd1 Rfd8
     16+  00:05    27,204,888  4,675,103  +0.71  Rxe2
     16-  00:06    28,877,954  4,627,639  +0.64  Rxe2 Rad8
     16  00:06    28,916,223  4,622,216  +0.62  Rxe2 Rad8 Rd2 Ne7 Qf3 c6 Ne4 h6 Nc5 Rb8 a4 Bxc5 dxc5 Nbd5 Rd4 Qf6 Qxf6 Nxf6 a5 Nf5 Rd3 Nxe3
     17  00:07    35,762,491  4,557,355  +0.66  Rxe2 Rad8 d5 Ne7 Qd3 Ng6 Rae1 a6 Ne4 Nf4 Bxf4 Qxf4 Nxd6 Qxd6 Re5 Nd7 R5e3 Nf6 Re7 Nxd5 Bxd5
     18+  00:09    43,920,038  4,454,497  +0.73  Rxe2
     18  00:10    45,562,008  4,438,437  +0.72  Rxe2 Rad8 d5 Ne7 Qd3 Ng6 Rae1 a6 Qf5 Nf4 Bxf4 Qxf4 Qxf4 Bxf4 g3 Bd6 Ne4 h6 Kg2 Rd7 Nxd6 Rxd6 Re7 Nd7
     19  00:16    70,585,470  4,264,352  +0.68  Rxe2 Rad8 d5 Ne5 Qd4 Qh5 Bf4 Ng6 Bxd6 cxd6 Rf1 Rc8 Ree1 Nf4 Nb5 Nbxd5 Nxd6 Rc6 Bxd5 Qxd5 Qxd5 Nxd5 Nxb7 Rc2
     20  00:26   113,759,980  4,327,556  +0.73  Rxe2 Rad8 d5 Ne7 Qd3 Ng6 Qf5 Nf4 Bxf4 Qxf4 Qxf4 Bxf4 g3 Bd6 Rc1 a6 Ne4 Rfe8 Rce1 Rf8 Kg2 h6 Nxd6 Rxd6 Re7 Nxd5 Bxd5
     21-  00:33   143,414,164  4,265,774  +0.66  Rxe2 Rad8
     21+  00:36   155,783,273  4,250,998  +0.73  Rxe2
     21  00:42   177,750,694  4,221,449  +0.72  Rxe2 Rad8 d5 Ne7 Qd3 Ng6 Rae1 Nf4 Bxf4 Qxf4 g3 Qg5 h4 Qg6 Qxg6 hxg6 Nb5 a6 Nxd6 Rxd6 Re7 Rc8 Re8+ Rxe8 Rxe8+ Kh7 Re7
     22-  01:02   261,643,314  4,183,374  +0.65  Rxe2 Rad8
     22  01:03   264,702,185  4,182,208  +0.64  Rxe2 Rad8 d5 Ne5 Qd4 Qh5 Bf4 Ng6 Bxd6 cxd6 a4 Qg5 Re3 f5 a5 Nc8 Kh2 Rde8 Rae1 Rxe3 Rxe3 f4 Ne4 Qf5 Re1 f3 Ng3
     23+  01:20   335,197,224  4,166,369  +0.71  Rxe2
     23  02:04   515,045,356  4,121,638  +0.73  Rxe2 Rad8 Rd2 h6 Qf3 a5 b5 Ne7 Rd3 Rde8 Rdd1 Rd8 Re1 c6 Rec1 Rd7 bxc6 bxc6 Ne4 Rdd8 Nc5 Rb8 Qg4 Qxg4 hxg4 Nbd5 Bxd5 Nxd5
     24  02:49   695,088,027  4,103,062  +0.79  Rxe2 Rad8 Rd2 h6 Qf3 a5 b5 Ne7 Rd3 Rde8 Rdd1 Rd8 Ra2 c6 bxc6 bxc6 Re2 Ned5 Nxd5 Nxd5 Bd2 Rde8 Rxe8 Rxe8 Bxd5 cxd5 Qxd5 Bxa3
     25-  03:12   788,342,385  4,102,021  +0.72  Rxe2 Rad8
     25  04:06  1,008,086,524  4,087,192  +0.71  Rxe2 Rad8 Rd2 h6 Qf3 Kh8 Ne4 f5 Nxd6 cxd6 d5 Ne5 Qf4 Qxf4 Bxf4 g5 Be3 Nbc4 Bxc4 Nxc4 Bd4+ Kg8 Rc2 b5 a4 a6 axb5 axb5 Re2 Rde8 Re6 Rxe6
     26+  06:18  1,543,211,776  4,078,683  +0.78  Rxe2
     26-  06:36  1,618,480,090  4,079,472  +0.71  Rxe2 Rad8
     26  07:59  1,957,885,831  4,085,988  +0.75  Rxe2 Rad8 Rc1 a6 Re1 h6 d5 Ne5 Bxb6 cxb6 Ne4 Ng6 Nxd6 Rxd6 Rc4 Qf6 Rce4 b5 g3 Rd7 h4 Ne7 h5 Rc8 Qe2 Re8 Rf4 Qc3 Rf3 Qc8 Qe4
     27-  11:07  2,731,241,139  4,092,512  +0.68  Rxe2 Rad8
     27+  14:17  3,517,092,155  4,100,907  +0.75  Rxe2
     27  15:19  3,774,944,041  4,103,860  +0.75  Rxe2 Rad8 d5 Ne7 Qd3 Ng6 Qf5 Rde8 Rae1 Re5 Qg4 h5 Qxh4 Nxh4 Bxb6 Rxe2 Rxe2 axb6 Nb5 Ra8 Bc2 g5 g3 Nf3+ Kg2 Ne5 Nxd6 cxd6 f4 gxf4 gxf4 Nc4 a4 Nb2
     28-  17:20  4,272,343,205  4,107,381  +0.68  Rxe2 Rad8
     28+  20:07  4,958,955,165  4,107,989  +0.75  Rxe2
     28-  23:08  5,711,062,428  4,112,782  +0.68  Rxe2 Rad8
     28+  24:35  6,074,843,581  4,116,818  +0.76  Rxe2
     28  29:48  7,357,627,874  4,114,325  +0.75  Rxe2 Rad8 d5 Ne7 Qd3 Ng6 Qf5 Rde8 Rae1 Re5 Qg4 h5 Qxh4 Nxh4 Bxb6 Rxe2 Rxe2 axb6 Nb5 Ra8 g3 Ng6 Kg2 Kf8 a4 Rc8 Nxd6 cxd6 Rc2 Rxc2 Bxc2 Ke7
     29+  38:29  9,540,165,448  4,130,549  +0.82  Rxe2
     29-  1:19:10  19,780,221,685  4,163,300  +0.75  Rxe2 Rad8
     29  1:24:48  21,187,833,940  4,163,728  +0.75  Rxe2 Rad8 d5 Ne7 Qd3 Ng6 Rae1 a6 Ne4 Nf4 Bxf4 Qxf4 g3 Qf5 Bc2 Kh8 Nxd6 Qxd3 Nxf7+ Rxf7 Bxd3 Nxd5 Bc4 c6 Re8+ Rf8 Rxf8+ Rxf8 f4 g6 Kg2 b5 Bxd5 cxd5 Re7 Rd8 Kf3 d4 Ke4
     30  1:40:49  25,240,810,598  4,172,402  +0.74  Rxe2 Rad8 Rc1 a5 Nb5 Bf4 Bxf4 Qxf4 bxa5 Nc8 Re1 Rd7 Re3 Nd6 Nxd6 Rxd6 g3 Qf6 d5 Nxa5 Rxc7 Qd8 Rce7 Nxb3 Qxb3 Rxd5 Qxb7 Rd3 Qe4 Rd1+ Re1 Rxe1+ Qxe1 h6 Qe3 Qd1+ Kh2 Qd6 Re8 Qc6 Rxf8+ Kxf8
     31+  2:05:46  31,605,232,051  4,187,911  +0.81  Rxe2
     31-  2:10:04  32,694,290,974  4,188,943  +0.74  Rxe2 Rad8
     31  2:17:31  34,586,451,059  4,191,585  +0.73  Rxe2 Rad8 Rc1 a5 b5 Ne7 Ne4 Qxe4 Bg5 Qg6 Bxe7 Bxe7 Rxe7 Nd5 Bxd5 Rxd5 Rcxc7 Qd6 Qb3 a4 Qg3 Qxg3 fxg3 b6 Rc4 Rxb5 Rxa4 h5 Rb4 Rxb4 axb4 Rd8 Rb7 g5 Rxb6 Rxd4 b5 Rb4 Kf2 Kg7 Rb8
     32+  2:42:05  40,890,825,602  4,204,409  +0.80  Rxe2
     32  3:30:26  53,285,471,230  4,220,171  +0.76  Rxe2 Rad8 Rc1 a5 b5 Ne7 Ne4 Qxe4 Bg5 Qg6 Bxe7 Bxe7 Rxe7 Nd5 Bxd5 Rxd5 Rcxc7 Qd6 Qb3 a4 Qg3 Qxg3 fxg3 b6 Rc4 g6 Rxa4 Rxb5 Rd7 Kg7 d5 Rb3 g4 Rd3 Rb4 Rxa3 Rxb6 Rd3 Rbb7
   2/10/2016 3:28:29 AM, Time for this analysis: 04:30:00, Rated time: 9:00:00

0 of 2 matching moves
2/10/2016 3:28:32 AM, Total time: 9:00:08 AM
Rated time: 9:00:00 = 32400 Seconds
Parent - - By Peter Grayson (****) [gb] Date 2016-02-12 21:25 Edited 2016-02-12 21:28
Thanks for the deeper analysis.

There is an interesting addenda to my conclusion appraisal of the first position.

Following your update, there was something niggling me regarding the 1..Rac8 choice. Therefore I ran the position for 2 hours using Stockfish 7 64 POPCNT BYO 2016x on the dual Xeon machine when after 47 ply depth, sure enough it also selected 1..Rac8 but with advantage to no side. However, I did observe it from time to time and as well as staying with 1..Nd5 for a while, during the course of the analysis it also looked quite deeply at 1..Nd7 that was the original primary move despite not selecting it.

On completion I decided to repeat the analysis but in 4 line mode to identify what Stockfish analysed as the top 4 moves. Takes longer in this mode but in the allocated 2 hours time it still achieved 42 ply depth for all four lines giving the following output ...

r4rk1/5p1p/p2qpnp1/1p2b3/3p4/3B1R2/PPQ3PP/R1BN3K b - - 0 1


Analysis by Stockfish 7 64 POPCNT BYO 2016x: 2 x Intel Xeon E5-2687w CPU's, 32 Gb hash.

4 line analysis

ply depth 42

1. =  (0.00): 1...Nd5 2.Qf2 f5 3.Bh6 Rfc8 4.a4 Rab8 5.Qe2 Bf4 6.Bxf4 Nxf4 7.Rxf4 Qxf4 8.axb5 axb5 9.Qxe6+ Kg7 10.Kg1 Kh6 11.g3 Qd2 12.Qe7 Qg5 13.Qe2 Rc1 14.Rxc1 Qxc1 15.Bxf5 gxf5 16.Qe6+ Kg7 17.Qe7+ Kg6 18.Qe6+ Kg5 19.Qe7+ Kh5 20.Qe2+ Kg6 21.Qe6+
2. =  (0.00): 1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Bxf4 Nxf4 6.Rxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Qd7+ Kh6 10.g3 Qe3 11.Rxa4 Rfd8 12.Qa7 Rb8 13.Ra2 Qc1+ 14.Bf1 Rxb2 15.Rxb2 Qxb2 16.Qe7 Rc8 17.Qh4+ Kg7 18.Qe7+ Kh6
3. =  (0.00): 1...Nd7 2.Nf2 f5 3.a4 Nb6 4.axb5 axb5 5.Rb1 Qd5 6.Nh3 Bg7 7.Qc7 Be5 8.Qc2
4. =  (0.00): 1...Rfc8 2.Qe2 Nd5 3.Nf2 f5 4.g3 Bg7 5.g4 Nb4 6.gxf5 exf5 7.Bd2 Re8 8.Qd1 Nd5 9.Rc1 Kh8 10.Bf1 Rad8 11.Rh3 Ne3 12.Qf3 Nxf1 13.Rxf1 Qe6 14.Nd3 Qxa2 15.Kg1 Kg8 16.Bg5 Rc8 17.Qb7 Rb8 18.Qa7 Ra8 19.Qb7 Rab8

(Grayson, Newport, South Wales 12.02.2016)

So in fact it assessed all four moves to be equal by the time 42 ply depth was reached. Which move was first was determined solely by which line gave a marginal advantage to Black for the deeper ply depth. Therefore in the single line analysis, 1..Rac8 was an arbitrary selection purely for that reason when there were at least 3 other moves giving the same score by its own analysis. The problem with the position then is there is likely more than one solution of equal standing. The 1..Rac8 line also indicated after 2.Qe2 ..Nd5 so there may be some transposition. From a human perspective, 1..Nd5 still looks the more natural move but it appears there is little if any difference in the likely outcome of the other possible choice moves.

Peter

Single line analysis ...
Analysis by Stockfish 7 64 POPCNT BYO 2016x: 2 x Intel Xeon E5-2687w CPU's, 32 Gb hash.

1...Rfc8 2.Qe2 Nd5 3.Bh6 f5 4.b3 Bxh2
  =/+  (-0.51)   Depth: 7/7   00:00:00  32kN
1...Rfc8 2.Qe2 Nd5 3.g3 f5 4.a4 bxa4 5.Bd2
  =  (-0.27)   Depth: 8/8   00:00:00  67kN
1...Rfc8 2.Qe2 Nd5 3.a4 f5 4.axb5 axb5 5.Rxa8 Rxa8
  =/+  (-0.36)   Depth: 9/12   00:00:00  105kN
1...Rfc8 2.Qe2 Nd5 3.a4 b4 4.b3 f5 5.Qf2 Bf6 6.Rh3 g5 7.Qe2
  =/+  (-0.47)   Depth: 10/13   00:00:00  141kN
1...Rfc8 2.Qd2 Nd5 3.Qf2 Rc7 4.Bh6 Nb4 5.a4 Nxd3 6.Rxd3 Rac8
  =/+  (-0.46)   Depth: 11/14   00:00:00  220kN
1...Nd5 2.a4 Nb4 3.Qf2 Nxd3 4.Rxd3 Qd5 5.Bh6 Rfc8 6.b3 bxa4 7.Rxa4
  =  (-0.26)   Depth: 12/16   00:00:00  771kN
1...Nd5 2.a4 f5 3.Bh6 Rfc8 4.Qf2 Bf6 5.Rh3 Nb4 6.Qe2 bxa4 7.Bd2 e5 8.Bc4+ Nd5 9.Rxa4
  =/+  (-0.45)   Depth: 13/19   00:00:00  2097kN
1...Nd5 2.a4 f5 3.axb5 axb5 4.Rxa8 Rxa8 5.Bxb5 Bxh2 6.Ra3 Rb8 7.Bc4 Bf4 8.Ra7 Qe5 9.Bd2 Rc8 10.b3 Bxd2 11.Qxd2
  =  (-0.20)   Depth: 14/21   00:00:00  2992kN
1...Nd5 2.a4 Rfc8 3.Qf2 f5 4.Bh6 Bf6 5.g4 Nb4 6.gxf5 Nxd3 7.Rxd3 exf5 8.axb5 Qd5+ 9.Qg2 Qe5 10.Nf2 Qxb5
  =  (-0.19)   Depth: 15/27   00:00:00  4162kN
1...Nd5 2.a4 f5 3.axb5 Nb4 4.Qa4 Nxd3 5.Rxd3 Qd5 6.Nc3 axb5 7.Nxd5 Rxa4 8.Rxa4 bxa4 9.Nb4 Bf6 10.Ra3 Ra8 11.Kg1 Kg7 12.Bd2 e5
  =  (-0.18)   Depth: 16/27   00:00:00  5751kN
1...Nd5 2.a4 f5 3.axb5 axb5 4.Rxa8 Rxa8 5.Bxb5 Bxh2 6.Ra3 Rxa3 7.bxa3 Bf4 8.a4 Bxc1 9.Qxc1 Kg7 10.Qc8 Qe5 11.Nb2 Kh6 12.Nd3 Qe2 13.Qb7
  =  (-0.14)   Depth: 17/30   00:00:00  8780kN
1...Nd5 2.a4 Rfc8 3.Qf2 f5 4.Bg5 Nb4 5.Bf1 bxa4 6.Rxa4 a5 7.Rh3 Ra7 8.Qh4 h5 9.Rha3 Qc5 10.Nf2 Bg7 11.Rh3
  =  (-0.13)   Depth: 18/37   00:00:01  19046kN
1...Nd5 2.a4 Nb4 3.Qe2 Nxd3 4.Rxd3 Bg7 5.Nf2 f5 6.b4 Rac8 7.Rda3 Qd5 8.axb5 axb5 9.Nd3 e5 10.Ra7 e4 11.Nf4 Qc4 12.Qxc4+ bxc4 13.Ne6
  =  (-0.18)   Depth: 19/37   00:00:02  60316kN
1...Nd5
  =/+  (-0.32 ++)   Depth: 20/37   00:00:03  84545kN
1...Nd5 2.Bh6
  =  (-0.25 --)   Depth: 20/37   00:00:03  89182kN
1...Nd5
  =/+  (-0.33 ++)   Depth: 20/37   00:00:04  93683kN
1...Nd5 2.Bh6
  =  (-0.22 --)   Depth: 20/37   00:00:04  104MN
1...Nd5 2.Bh6 Bg7 3.Bxg7 Kxg7 4.g4 e5 5.Qd2 Rac8 6.Nf2 Nf4 7.Ne4 Qd5 8.g5 f5 9.gxf6+ Rxf6 10.Raf1 Rff8 11.b3 Kg8 12.Qb4 Qb7 13.a4
  =  (-0.22)   Depth: 20/37   00:00:04  108MN
1...Nd5 2.Bh6 Bg7 3.Bxg7 Kxg7 4.g4 f5 5.gxf5 exf5 6.Qd2 Qb4 7.Qxb4 Nxb4 8.Nf2 Rfe8 9.a4 bxa4 10.Rxa4 a5 11.Kg1 Re3 12.Kg2 Nxd3 13.Nxd3
  =  (-0.23)   Depth: 21/37   00:00:04  114MN
1...Nd5
  =  (-0.30 ++)   Depth: 22/37   00:00:05  124MN
1...Nd5 2.Bh6
  =  (-0.23 --)   Depth: 22/37   00:00:05  141MN
1...Nd5 2.Bh6 Bg7 3.Bxg7 Kxg7 4.g4 e5 5.Nf2 Ne3 6.Qe2 f6 7.a4 bxa4 8.Rxa4 Qc6 9.Ra1 f5 10.gxf5 gxf5 11.Nd1 Nxd1 12.Qxd1 Kh8 13.Bc2 f4 14.Bb3
  =  (-0.27)   Depth: 22/37   00:00:05  141MN
1...Nd5 2.Bh6
  =  (-0.20 --)   Depth: 23/37   00:00:06  164MN, tb=2
1...Nd5
  =  (-0.27 ++)   Depth: 23/37   00:00:06  165MN, tb=2
1...Nd5
  =/+  (-0.38 ++)   Depth: 23/37   00:00:08  208MN, tb=4
1...Nd5 2.Bh6
  =  (-0.29 --)   Depth: 23/37   00:00:08  211MN, tb=4
1...Nd5 2.Bh6 Bg7 3.Qd2 f5 4.Bc2 e5 5.Bb3 Kh8 6.Nf2 Bxh6 7.Qxh6 Ne3 8.Rh3 Ra7 9.Rxe3 dxe3 10.Qxe3 Qd4 11.Qe2 e4 12.Rd1 Qf6 13.Qd2 Rc8 14.Nh3
  =  (-0.27)   Depth: 23/37   00:00:08  218MN, tb=4
1...Nd5 2.Bh6
  =  (-0.20 --)   Depth: 24/37   00:00:09  229MN, tb=4
1...Nd5
  =  (-0.27 ++)   Depth: 24/37   00:00:10  256MN, tb=4
1...Nd5 2.Bh6 Bg7 3.Qd2 f5 4.Bc2 e5 5.Bb3 Kh8 6.Bxg7+ Kxg7 7.Nf2 a5 8.a4 b4 9.Kg1 Rac8 10.Nd3 Kh8 11.Rh3 Rc7 12.Bxd5 Qxd5 13.Rc1 Rxc1+ 14.Qxc1 f4 15.Nc5 Kg8
  =  (-0.22)   Depth: 24/37   00:00:11  288MN, tb=4
1...Nd5 2.Qf2
  =  (-0.15 --)   Depth: 25/37   00:00:14  355MN, tb=4
1...Nd5 2.Qf2
  =  (-0.08 --)   Depth: 25/40   00:00:16  419MN, tb=4
1...Rac8
  =  (-0.15 ++)   Depth: 25/40   00:00:21  552MN, tb=4
1...Rac8 2.Qe2
  =  (-0.06 --)   Depth: 25/40   00:00:23  588MN, tb=4
1...Rac8 2.Qe2 Nd5 3.a4 Bf4 4.Bd2 e5 5.Nf2 Qe6 6.Kg1 Bxd2 7.Qxd2 f5 8.axb5 axb5 9.Bxb5 Rc7 10.Ba4 Ne3 11.Nh3 h6 12.Nf2 Qb6 13.b4 e4 14.Bb3+ Kg7 15.Nxe4 fxe4 16.Rxf8
  =  (-0.03)   Depth: 25/42   00:00:30  778MN, tb=4
1...Nd5
  =  (-0.10 ++)   Depth: 26/42   00:00:32  813MN, tb=4
1...Nd5
  =  (-0.17 ++)   Depth: 26/42   00:00:32  822MN, tb=4
1...Nd5 2.Qf2
  =  (-0.10 --)   Depth: 26/42   00:00:40  1029MN, tb=24
1...Nd5 2.Qf2 f5 3.Bh6 Rfe8 4.a4 Bg7 5.Bxg7 Kxg7 6.axb5 axb5 7.Rxa8 Rxa8 8.Qxd4+ e5 9.Qg1 e4 10.Qd4+ Kg8 11.Bxe4 fxe4 12.Qxe4 Qd7 13.Kg1 Ra1 14.Rd3 Nf6 15.Rxd7 Nxe4 16.Rd4 Kf7 17.Rxe4 Rxd1+ 18.Kf2 Rd2+ 19.Re2 Rd5 20.Rc2
  =  (-0.10)   Depth: 26/42   00:00:43  1104MN, tb=24
1...Rac8
  =  (-0.17 ++)   Depth: 27/42   00:00:45  1162MN, tb=24
1...Rac8 2.Qe2
  =  (-0.10 --)   Depth: 27/42   00:00:46  1184MN, tb=24
1...Rac8
  =  (-0.17 ++)   Depth: 27/42   00:00:47  1207MN, tb=24
1...Rac8 2.Qe2 Nd5 3.a4 Bf4 4.Bd2 e5 5.axb5 axb5 6.Nf2 Bxd2 7.Qxd2 f5 8.Bxb5 e4 9.Nxe4 Qb6 10.Nd6 Qxd6 11.Qxd4 Qc5 12.Qxc5 Rxc5 13.Ba4 Ra8 14.Rfa3 Kg7 15.Kg1 Rb8 16.Rb3 Nb4 17.Rh3 Nc6 18.Bb3
  =  (-0.08)   Depth: 27/42   00:00:47  1211MN, tb=24
1...Rac8
  =  (-0.15 ++)   Depth: 28/42   00:00:48  1240MN, tb=25
1...Rac8 2.Qe2
  =  (-0.08 --)   Depth: 28/42   00:00:49  1267MN, tb=25
1...Rac8
  =  (-0.15 ++)   Depth: 28/42   00:00:51  1295MN, tb=27
1...Rac8 2.Qe2 Nd5 3.a4 Bf4 4.Bd2 e5 5.axb5 axb5 6.Nf2 Bxd2 7.Qxd2 f5 8.Bxb5 Qb4 9.Qxb4 Nxb4 10.Nd1 e4 11.Rb3 Nc6 12.Ba6 Rb8 13.Rxb8 Rxb8 14.Kg1 Kg7 15.Kf2 Kf6 16.Ra4 Ke5 17.Ke2 Kf6 18.Bc4
  =  (-0.12)   Depth: 28/42   00:00:51  1300MN, tb=27
1...Rac8 2.Qe2 Nd5 3.a4 Bf4 4.Bd2 e5 5.axb5 axb5 6.Nf2 Bxd2 7.Qxd2 f5 8.Bxb5 Qb4 9.Qxb4 Nxb4 10.Bd7 Rc7 11.Be6+ Kg7 12.g4 e4 13.Rb3 Nc2 14.Rc1 d3 15.Nxd3 exd3 16.Rxd3 f4 17.Kg1 Rb8 18.Rb3 Rxb3 19.Bxb3
  =  (-0.09)   Depth: 29/42   00:00:53  1351MN, tb=27
1...Rac8 2.Qe2 Nd5 3.a4 Bf4 4.Bd2 e5 5.axb5 axb5 6.Nf2 Bxd2 7.Qxd2 f5 8.Bxb5 Qb4 9.Qxb4 Nxb4 10.Bd7 Rc7 11.Be6+ Kg7 12.g4 e4 13.Rb3 Nc2 14.Rc1 d3 15.Nxd3 exd3 16.Rxd3 fxg4 17.Bxg4 Rff7 18.Be6 Rfe7 19.Bg4 Nb4 20.Rxc7 Rxc7 21.Rd4 Nc2 22.Rd7+ Rxd7 23.Bxd7
  =  (-0.11)   Depth: 30/49   00:01:00  1546MN, tb=53
1...Rac8 2.Qe2
  =  (-0.04 --)   Depth: 31/49   00:01:14  1897MN, tb=380
1...Nd5 2.Qf2 f5 3.Bh6 Rfc8 4.a4 bxa4 5.Rxa4 a5 6.Qe2 Bg7 7.Bxg7 Kxg7 8.Rxd4 e5 9.Rc4 e4 10.Bxe4 fxe4 11.Rxe4 Rf8 12.Re6 Qxe6 13.Qxe6 Rae8 14.Qd7+ Re7 15.Qxe7+ Nxe7 16.Rxf8 Kxf8 17.Ne3 Nc6 18.Kg1 Ne5 19.Kf1 Kf7 20.Ke2 Ke6 21.Kd1 Kd6 22.Kd2 Kc5 23.Kc3 Nc6 24.Kd3 Kb4
  =  (-0.08)   Depth: 31/49   00:01:27  2244MN, tb=629
1...Nd5 2.Qf2 Bg7 3.g4 Nb4 4.Be4 Rac8 5.Bf4 Qd7 6.g5 Nd5 7.Qg2 f5 8.gxf6 Nxf6 9.Nf2 Nxe4 10.Nxe4 d3 11.Qh3 Rc2 12.Ng5 h6 13.Qxe6+ Qxe6 14.Nxe6 Bxb2 15.Nxf8 Bxa1 16.Nxg6 Kf7 17.Nh4 Bf6 18.Bxh6 d2
  =  (-0.04)   Depth: 32/51   00:02:14  3457MN, tb=708
1...Nd5
  =  (-0.11 ++)   Depth: 33/52   00:03:34  5521MN, tb=1953
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Bxf4 Nxf4 6.Rxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Qd7+ Kh6 10.Bf1 Rc2 11.Nd1 d3 12.Rxa4 Rc7 13.Qd4 Qxd4+ 14.Rxd4 Rc2 15.Rxd3 Re8 16.Rc3 Rxc3 17.Nxc3 Rb8 18.Bxa6 Rxb2 19.Nd5 Kg5 20.g3 Kg4 21.Nf6+ Kf3 22.Bf1
  =  (-0.13)   Depth: 33/52   00:03:48  5899MN, tb=2047
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Bxf4 Nxf4 6.Rxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Qd7+ Kh6 10.Bf1 Rc2 11.Nd1 d3 12.Rxa4 Rc7 13.Qd4 Qxd4+ 14.Rxd4 Rc2 15.Rxd3 Re8 16.Rc3 Rxc3 17.Nxc3 Rb8 18.Bxa6 Rxb2 19.Nd5 Kg5 20.g3 Rd2 21.Ne3 f4 22.h4+ Kh5 23.gxf4 Kxh4 24.f5
  =  (-0.13)   Depth: 34/52   00:03:54  6059MN, tb=2201
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Rxf4 Nxf4 6.Bxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Qd7+ Kh6 10.Bf1 Rc2 11.Nd1 d3 12.Rxa4 Rc7 13.Qd4 Qxd4+ 14.Rxd4 Rc2 15.Rxd3 Re8 16.Rc3 Rxc3 17.Nxc3 Rb8 18.Bxa6 Rxb2 19.Nd5 g5 20.g3 Rd2 21.Ne3 f4 22.Nc4 Ra2 23.Bb7 Rc2 24.Bd5 fxg3
  =  (-0.13)   Depth: 35/52   00:04:31  7006MN, tb=2477
1...Rac8 2.Qe2
  =  (-0.06 --)   Depth: 36/58   00:06:13  9646MN, tb=9572
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Rxf4 Nxf4 6.Bxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Rxa4 Rc1+ 10.Bf1 Rc2 11.Nd1 Rf6 12.Qe8 Rd2 13.Qe1 Re6 14.Qxe6 Rxd1 15.Qe2 Qe3+ 16.Qf2 Rd2 17.Qxe3 dxe3 18.Rxa6 e2 19.Ra7+ Kh6 20.Bxe2 Rxe2 21.b4 Rd2 22.Rb7 Rb2 23.b5 Kg5 24.Rxh7 Rxb5 25.Kf2 Rb8 26.Kf3
  =  (-0.06)   Depth: 36/58   00:06:42  10379MN, tb=10103
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Rxf4 Nxf4 6.Bxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Rxa4 Rc1+ 10.Bf1 Rc2 11.Nd1 Rf6 12.Qe8 Rd2 13.Qe1 Re6 14.Qxe6 Rxd1 15.Qe2 Qe3+ 16.Qf2 Rd2 17.Qxe3 dxe3 18.Rxa6 e2 19.Ra7+ Kh6 20.Bxe2 Rxe2 21.b4 Rd2 22.Rb7 Rb2 23.b5 Kg5 24.Rxh7 Rxb5 25.Kf2 Rb2+ 26.Kf3 Rb3+ 27.Kf2 Kf4 28.g3+ Kg5 29.h3 f4 30.gxf4+ Kxf4 31.Ra7
  =  (-0.05)   Depth: 37/62   00:07:03  10900MN, tb=10910
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Rxf4 Nxf4 6.Bxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Rxa4 Rc1+ 10.Bf1 Rc2 11.Nd1 Rf6 12.Qe8 Rd2 13.Qe1 Re6 14.Qxe6 Rxd1 15.Qe2 Qe3+ 16.Qf2 Rd2 17.Qxe3 dxe3 18.Rxa6 e2 19.Ra7+ Kh6 20.Bxe2 Rxe2 21.b4 Rd2 22.Rb7 Rb2 23.b5 Kg5 24.Rxh7 Rxb5 25.Kf2 Rb2+ 26.Kf3 Rb3+ 27.Kf2 Kf4 28.g3+ Kg5 29.h3 f4 30.gxf4+ Kxf4 31.Rh4+ Ke5
  =  (-0.05)   Depth: 38/62   00:13:01  20053MN, tb=23534
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Rxf4 Nxf4 6.Bxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Rxa4 Rc1+ 10.Bf1 Rb1 11.Qxa6 Rxb2 12.Qa7+ Rf7 13.Qxd4+ Qxd4 14.Rxd4 Ra7 15.Nd1 Rbb7 16.Kf2 Rd7 17.Rxd7+ Rxd7 18.Be2 Kf6 19.Nb2 Ke5 20.Nd3+ Kd5 21.g3 Ra7 22.Nf4+ Kd4 23.Ne6+ Ke5 24.Ng5 Kf6 25.Nf3 Ra2 26.Ke3 Ra4 27.Nd2 Ra2
  =  (-0.05)   Depth: 39/71   00:14:10  21792MN, tb=35176
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Rxf4 Nxf4 6.Bxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Rxa4 Rc1+ 10.Bf1 Rb1 11.Qxa6 Rxb2 12.Qa7+ Rf7 13.Qxd4+ Qxd4 14.Rxd4 Ra7 15.Nd1 Rc2 16.Ne3 Rc3 17.Nd1 Rcc7 18.g3 Rd7 19.Rxd7+ Rxd7 20.Be2 Kf6 21.Kf2 Ke5 22.Ke3 Re7 23.Bc4 Kf6+ 24.Kd4 Rd7+ 25.Bd5 f4 26.gxf4 Kf5 27.Kc5 Kxf4
  =  (-0.05)   Depth: 40/71   00:15:24  23745MN, tb=45672
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Rxf4 Nxf4 6.Bxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Rxa4 Rc1+ 10.Bf1 Rb1 11.Qxa6 Rxb2 12.Qa7+ Rf7 13.Qxd4+ Qxd4 14.Rxd4 Ra7 15.Nd1 Rc2 16.Ne3 Rc3 17.Nd1 Rcc7 18.g3 Rd7 19.Rxd7+ Rxd7 20.Be2 Kf6 21.Kf2 Ke5 22.Ne3 Ke4 23.Nc4 f4 24.Bf3+ Kd4 25.Na5 fxg3+ 26.Kxg3 Kc5 27.Be2 Rc7 28.Bf3
  =  (-0.05)   Depth: 41/71   00:18:56  29215MN, tb=50760
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.Bd2 Bxh2 5.Nh3 e5 6.Kxh2 e4+ 7.Rg3 Rce8 8.Bc4 bxc4 9.Qxc4 d3 10.Nf4 Rd8 11.Rf1 Rf7 12.Nxd5 Qxd5 13.Qxa6 Qe5 14.Bc3 Qd5 15.Rh3 Rd6 16.Qc8+ Rd8 17.Qa6
  =  (0.00)   Depth: 42/71   00:34:14  53320MN, tb=141933
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.Bd2 Bxh2 5.Nh3 e5 6.Kxh2 e4+ 7.Rg3 Rce8 8.Bc4 bxc4 9.Qxc4 d3 10.Nf4 Rd8 11.Rf1 Rf7 12.Nxd5 Qxd5 13.Qxa6 Qe5 14.Bc3 Qd5 15.Rh3 Rd6 16.Qc8+ Rd8 17.Qa6
  =  (0.00)   Depth: 43/71   00:36:39  57198MN, tb=186272
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.Bd2 Bxh2 5.Nh3 e5 6.Kxh2 e4+ 7.Rg3 Rce8 8.Bc4 bxc4 9.Qxc4 d3 10.Nf4 Rd8 11.Rf1 Rf7 12.Nxd5 Qxd5 13.Qxa6 Qe5 14.Bc3 Qd5 15.Rh3 Rd6 16.Qc8+ Rd8 17.Qa6
  =  (0.00)   Depth: 44/71   00:44:42  69925MN, tb=217909
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.Bd2 Bxh2 5.Nh3 e5 6.Kxh2 e4+ 7.Rg3 Rce8 8.Bc4 bxc4 9.Qxc4 d3 10.Nf4 Rd8 11.Rf1 Rf7 12.Nxd5 Qxd5 13.Qxa6 Qe5 14.Bc3 Qd5 15.Rh3 Rd6 16.Qc8+ Rd8 17.Qa6
  =  (0.00)   Depth: 45/71   01:08:33  107994MN, tb=333277
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.Bd2 Bxh2 5.Nh3 e5 6.Kxh2 e4+ 7.Rg3 Rce8 8.Bc4 bxc4 9.Qxc4 d3 10.Nf4 Rd8 11.Rf1 Rf7 12.Nxd5 Qxd5 13.Qxa6 Qe5 14.Bc3 Qd5 15.Rh3 Rd6 16.Qc8+ Rd8 17.Qa6
  =  (0.00)   Depth: 46/71   01:11:18  112474MN, tb=392915
1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.Bd2 Bxh2 5.Nh3 e5 6.Kxh2 e4+ 7.Rg3 Rce8 8.Bc4 bxc4 9.Qxc4 d3 10.Nf4 Rd8 11.Rf1 Rf7 12.Nxd5 Qxd5 13.Qxa6 Qe5 14.Bc3 Qd5 15.Rh3 Rd6 16.Qc8+ Rd8 17.Qa6
  =  (0.00)   Depth: 47/71   01:25:17  135169MN, tb=728889

(Grayson, Newport, South Wales 12.02.2016)

New game

Analysis by Stockfish 7 64 POPCNT BYO 2016x: 4 line analysis

1. =  (0.00): 1...Nd5 2.Qf2 f5 3.Bh6 Rfc8 4.a4 Rab8 5.Qe2 Bf4 6.Bxf4 Nxf4 7.Rxf4 Qxf4 8.axb5 axb5 9.Qxe6+ Kg7 10.Kg1 Kh6 11.g3 Qd2 12.Qe7 Qg5 13.Qe2 Rc1 14.Rxc1 Qxc1 15.Bxf5 gxf5 16.Qe6+ Kg7 17.Qe7+ Kg6 18.Qe6+ Kg5 19.Qe7+ Kh5 20.Qe2+ Kg6 21.Qe6+
2. =  (0.00): 1...Rac8 2.Qe2 Nd5 3.Nf2 f5 4.a4 Bf4 5.Bxf4 Nxf4 6.Rxf4 Qxf4 7.Qxe6+ Kg7 8.Kg1 bxa4 9.Qd7+ Kh6 10.g3 Qe3 11.Rxa4 Rfd8 12.Qa7 Rb8 13.Ra2 Qc1+ 14.Bf1 Rxb2 15.Rxb2 Qxb2 16.Qe7 Rc8 17.Qh4+ Kg7 18.Qe7+ Kh6
3. =  (0.00): 1...Nd7 2.Nf2 f5 3.a4 Nb6 4.axb5 axb5 5.Rb1 Qd5 6.Nh3 Bg7 7.Qc7 Be5 8.Qc2
4. =  (0.00): 1...Rfc8 2.Qe2 Nd5 3.Nf2 f5 4.g3 Bg7 5.g4 Nb4 6.gxf5 exf5 7.Bd2 Re8 8.Qd1 Nd5 9.Rc1 Kh8 10.Bf1 Rad8 11.Rh3 Ne3 12.Qf3 Nxf1 13.Rxf1 Qe6 14.Nd3 Qxa2 15.Kg1 Kg8 16.Bg5 Rc8 17.Qb7 Rb8 18.Qa7 Ra8 19.Qb7 Rab8

(Grayson, Newport, South Wales 12.02.2016)
Parent - By user923005 (****) [us] Date 2016-02-13 01:07
Thanks for your excellent efforts on this.
I would still play Nd7.  Not that it is any better (since clearly it isn't) but that its purpose is obvious to me.
Rac8 would be my second choice because it is also obvious (scare the queen off of an open file and gain one for myself).  Similarly for Rfc8 {for the same reasons}.
I cannot clearly see the purpose of Nd5 without cheating and following the pv one move at a time.
Up Topic The Rybka Lounge / Test Positions / Somebody needs a good pounding. Wait... It's me.

Powered by mwForum 2.27.4 © 1999-2012 Markus Wichitill