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Up Topic The Rybka Lounge / Test Positions / 5 hard positions (III)
- - By dorszcz (*) Date 2018-12-01 17:20
1k6/4R3/1p6/p1p3p1/qnBn2Qp/5P2/1P6/1K6 w - - 0 1

r1b1r1k1/3p1pP1/pp1P1q2/2bQ4/5P1n/P1N5/1PP1B1PP/R1B2K1R b - - 0 1

8/q7/8/2pp4/5K2/5N2/2R2B2/7k w - - 0 2

3q1r1k/6rp/3p4/P2Pbp1Q/N3Pp1n/2P5/P1B2RPP/R6K b - - 0 28

rn2k2r/p2p1ppp/bp6/2pP4/1b2P2q/2N5/PP4PP/R1BQKBNR w KQkq - 0 10
Parent - - By Vinvin (***) [be] Date 2018-12-02 01:09
Thanks for this new set.
position #4 is the hardest.
Here are the output, CPU : 6*4GHz.

Position #1 -> Bb3
Stockfish_18112915_x64_modern:
...
26/47-  00:24   294 470 132  11 962 064  -20,25  1.Rb7+ Kxb7
26/50+  00:28   338 284 268  11 892 155  -18,39  1.Bb3
26/50+  00:28   338 293 187  11 892 051   0,00  1.Bb3
26/50  00:28   338 295 133  11 892 119   0,00  1.Bb3 Nxb3 2.Qf4+ gxf4 3.Rb7+ Kc8 4.Rc7+ Kd8 5.Rd7+ Ke8 6.Re7+ Kf8 7.Re8+ Kf7 8.Re7+
27/26  00:28   338 407 473  11 888 964   0,00  1.Bb3 Nxb3 2.Qf4+ gxf4 3.Rb7+ Kc8 4.Rc7+ Kd8 5.Rd7+ Ke8 6.Re7+ Kf8 7.Re8+ Kf7 8.Re7+ Kf6 9.Re6+ Kg7 10.Re7+ Kh6 11.Re6+ Kh5 12.Re5+ Kg6 13.Re6+
28/26  00:28   338 412 163  11 888 711   0,00  1.Bb3 Nxb3 2.Qf4+ gxf4 3.Rb7+ Kc8 4.Rc7+ Kd8 5.Rd7+ Ke8 6.Re7+ Kf8 7.Re8+ Kf7 8.Re7+ Kf6 9.Re6+ Kg7 10.Re7+ Kh6 11.Re6+

Position #2 -> Bb7

Stockfish_18112915_x64_modern:
...
30/55  00:31   256 893 834  8 235 624  +1,66  1. ... Rb8 2.Qh5 Ng6 3.Qg5 Qd4 4.Qg3 Bb7 5.Bd3 Bxd6 6.Ne2 Rxe2 7.Kxe2 Nxf4+ 8.Bxf4 Bxf4 9.Qh4 Re8+ 10.Kd1 Kxg7 11.Rf1 Re4 12.Qf2 Qd5 13.Re1 Qh5+ 14.Re2 Rxe2 15.Qxe2 Qxh2 16.c3 Qg1+ 17.Kc2 Qxa1 18.Qg4+ Kf8 19.Qxf4 Bc6 20.Bxa6 Qh1 21.Kb3 Qxg2 22.Bc4 Qg6 23.Qd4 Qg5 24.Qxb6 Ke7 25.Qd4
31/64-  00:34   288 799 729  8 266 300  +1,56  1. ... Bb7
31/64-  00:34   289 049 959  8 265 182  +1,47  1. ... Bb7
31/64-  00:37   314 330 170  8 275 330  -1,42  1. ... Bb7
31/64  00:38   318 219 466  8 272 316  -2,12  1. ... Bb7 2.Qxb7 Qd4 3.Nd1 Rab8 4.Be3 Qxd6 5.Qxa6 Bxe3 6.Nxe3 Qxf4+ 7.Ke1 Qxe3 8.Qd3 Nxg2+ 9.Kd1 Qe5 10.Rf1 Nf4 11.Rxf4 Qxf4 12.Qf3 Qe5 13.Kd2 Qg5+ 14.Kd1 Qg1+ 15.Qf1
32/46-  00:40   337 848 860  8 259 353  -2,21  1. ... Bb7
32/52-  00:44   366 620 688  8 267 650  -2,31  1. ... Bb7
32/54-  00:48   404 085 100  8 279 075  -2,93  1. ... Bb7
32/54  00:50   419 232 971  8 290 643  -3,20  1. ... Bb7 2.Qxb7 Qd4 3.Nd1 Rab8 4.Be3 Qxd6 5.Qxa6 Bxe3 6.Nxe3 Qxf4+ 7.Ke1 Rxe3 8.Rf1 Nxg2+ 9.Kd1 Qe5 10.Qb5 d5 11.Kd2 Qg5 12.c3 Rbe8 13.Kc2 Rxe2+ 14.Kb3 Qg4 15.Qxd5 Nf4 16.Qc4 b5 17.Qxf4 Qe6+ 18.c4 bxc4+ 19.Kc3 Re3+ 20.Kc2 c3 21.Qxf7+ Qxf7 22.Rxf7 Kxf7 23.Rg1 cxb2 24.Kxb2 Kg8 25.Rg2 Rc8 26.Ka2

Position #2 -> Bd4

Stockfish_18112915_x64_modern:
...
40/5  00:06   19 532 877  2 915 354   0,00  2.Bxc5 Qa4+ 3.Nd4 Qxd4+
41/16+  00:13   44 997 737  3 343 319  +0,09  2.Bd4
41/16+  00:14   48 643 457  3 444 516  +0,19  2.Bd4
41/31+  00:19   81 292 117  4 111 476  +153,09  2.Bd4
41/39  00:19   82 880 543  4 145 892  +153,12  2.Bd4 Qc7+ 3.Ne5 Qd8 4.Rc1+ Kg2 5.Rg1+ Kh3 6.Rg3+ Kh4 7.Nf3+ Kh5 8.Rh3+ Kg6 9.Ne5+ Kg7 10.Nc6+ Kg6 11.Nxd8 c4 12.Bf6 Kxf6
42/49  00:21   94 229 534  4 377 475  +153,12  2.Bd4 Qc7+ 3.Ne5 Qd8 4.Rc1+ Kg2 5.Rg1+ Kh3 6.Rg3+ Kh4 7.Nf3+ Kh5 8.Rh3+ Kg6 9.Ne5+ Kg7 10.Nc6+ Kf7 11.Nxd8+ Ke8 12.Bxc5 Kxd8
43/56  00:22   106 203 161  4 628 395  +153,12  2.Bd4 Qc7+ 3.Ne5 Qc8 4.Kg3 Qg8+ 5.Ng4 Qb8+ 6.Kh3 Qb3+ 7.Rc3 Qb1 8.Nf2+ Kg1 9.Ne4+ cxd4 10.Rg3+ Kf1 11.Nd2+ Ke2 12.Nxb1 Ke1 13.Rg5 Ke2 14.Rxd5 Ke3 15.Nd2 Kd3 16.Nb3 Kc4 17.Rxd4+ Kb5
44/51  00:23   109 248 905  4 698 069  +153,12  2.Bd4 Qc7+ 3.Ne5 Qc8 4.Kg3 Qg8+ 5.Ng4 Qb8+ 6.Kh3 Qb3+ 7.Rc3 Qb1 8.Nf2+ Kg1 9.Ne4+ cxd4 10.Rg3+ Kf1 11.Nd2+ Ke2 12.Nxb1 Ke1 13.Rg5 Ke2 14.Rxd5 Ke3 15.Nd2 Kd3 16.Nb3 Kc4 17.Rxd4+ Kc3 18.Kh4 Kxb3
45/55  00:23   115 406 856  4 812 027  +153,12  2.Bd4 Qc7+ 3.Ne5 Qc8 4.Kg3 Qg8+ 5.Ng4 Qb8+ 6.Kh3 Qb3+ 7.Rc3 Qb1 8.Nf2+ Kg1 9.Ne4+ cxd4 10.Rg3+ Kf1 11.Nd2+ Ke2 12.Nxb1 d3
46/62  00:24   117 570 766  4 841 490  +153,12  2.Bd4 Qc7+ 3.Ne5 Qc8 4.Kg3 Qg8+ 5.Ng4 Qb8+ 6.Kh3 Qb3+ 7.Rc3 Qb1 8.Nf2+ Kg1 9.Ne4+ cxd4 10.Rg3+ Kf1 11.Nd2+ Ke2 12.Nxb1 d3

Position #4 -> f3

Stockfish_18112915_x64_modern:
...
40/18  02:15  1 095 502 770  8 077 678   0,00  28. ... Qe7 29.exf5 Rfg8 30.Rg1 f3 31.f6 Bxf6 32.g3 Qe3 33.Rgf1 Re7 34.Kg1 Rgg7 35.Rb1 Rb7 36.Rbf1
41/50-  04:30  2 155 825 490  7 958 775  -0,10  28. ... f3
41/55-  04:31  2 163 664 478  7 958 101  -0,19  28. ... f3
41/65-  05:00  2 378 816 883  7 917 855  -0,54  28. ... f3
41/65  05:04  2 408 947 154  7 923 256  -0,25  28. ... f3 29.g3 Bxg3 30.hxg3 Rxg3 31.Rh2 Rfg8 32.Qxh4 Qxh4 33.Rxh4 f2 34.Rf1 Rg1+ 35.Kh2 Rxf1 36.Rf4 fxe4 37.Bxe4 Rfg1 38.Rxf2 R1g4 39.Rg2 Rxe4 40.Nb6 Rxg2+ 41.Kxg2 Re2+ 42.Kf3 Rxa2 43.Nc4 Kg7 44.Nxd6 Rxa5 45.c4 Kg6 46.Kf4 Rc5 47.Ke3 h5 48.Kf3 Rc7 49.Kg3 Rh7 50.c5 Kf6 51.Nc4 Rb7 52.Kf3 Rb4 53.Nb6 Ke7
42/47-  05:22  2 553 047 018  7 926 698  -0,35  28. ... f3
42/47-  05:31  2 632 110 783  7 938 565  -0,44  28. ... f3
42/65-  05:51  2 797 794 551  7 961 624  -0,79  28. ... f3
42/65  06:57  3 336 194 462  7 996 324  -1,04  28. ... f3 29.g3 Bxg3 30.hxg3 Rxg3 31.Rh2 Rfg8 32.Qxh4 Qxh4 33.Rxh4 f2 34.Rf1 Rg1+ 35.Kh2 Rxf1 36.Rf4 fxe4 37.Bxe4 Rfg1 38.Rxf2 R1g4 39.Rg2 Rxe4 40.Nb6 Re7 41.c4 Rc7 42.Rb2 Ra7 43.Rb5 Rg4 44.a4 Rag7 45.Rb3 Rg2+ 46.Kh3 R2g6 47.Kh2 Ra7 48.Rb5 Rg4 49.a6 Rag7 50.Rb3 Rg2+ 51.Kh3 R2g6 52.Kh2 Ra7 53.Rb5 Rxa6 54.c5 dxc5

Position #5 -> g3

Stockfish_18112915_x64_modern:
...
30/48+  00:30   231 120 968  7 680 223  -1,87  10.Kd2
30/48+  00:33   259 548 595  7 690 784  -1,66  10.g3
30/48+  00:34   266 900 244  7 690 763  -0,54  10.g3
30/48  00:34   269 033 708  7 691 512  -0,19  10.g3 Qxe4+ 11.Kf2 Qxh1 12.Bg2 Qxh2 13.Bf4 0-0 14.Nh3 f5 15.Qf3 Re8 16.g4 Bxc3 17.Bxh2 Bd4+ 18.Kg3 Re3 19.Qxe3 Bxe3 20.Re1 Bd2 21.Re8+ Kf7 22.Rd8 Be1+ 23.Kf4 Ke7 24.Rg8 Bd2+ 25.Kg3 f4+ 26.Nxf4 Kf7 27.Rd8 Bxf4+ 28.Kxf4 Be2
31/45+  00:35   275 621 212  7 703 220  -0,10  10.g3
31/52+  00:37   292 107 709  7 728 943   0,00  10.g3
31/52+  00:40   312 372 038  7 733 129  +0,98  10.g3
31/52  00:41   320 868 662  7 700 601  +1,44  10.g3 Qxe4+ 11.Kf2 Qxh1 12.Bg2 Qxh2 13.Bf4 0-0 14.Nh3 f5 15.Qh5 Bxc3 16.bxc3 Bc4 17.Rh1 Qxg2+ 18.Kxg2 Bxd5+ 19.Kh2 Bxh1 20.Bd6 Bc6 21.Bxf8 Kxf8 22.Qxf5+ Ke7 23.Qxh7 Kd6 24.Qxg7 Kc7 25.Nf4 a5 26.g4 Na6 27.g5
32/46+  00:44   342 684 786  7 703 724  +1,53  10.g3
32/48+  00:46   359 376 500  7 714 922  +1,63  10.g3
32/54+  00:48   372 201 609  7 728 117  +1,98  10.g3
32/62  00:49   384 006 170  7 755 350  +1,91  10.g3 Qxe4+ 11.Kf2 Qxh1 12.Bg2 Qxh2 13.Bf4 0-0 14.Nh3 f5 15.Qh5 Bxc3 16.bxc3 Bc4 17.Rh1 Qxg2+ 18.Kxg2 Bxd5+ 19.Kh2 Bxh1 20.Bd6 Be4 21.Bxf8 Kxf8 22.Ng5 Bd5 23.Nxh7+ Kg8 24.Ng5 Kf8 25.Qg6 Ke7 26.Qxf5 Bc6 27.Qe5+ Kf8 28.Nh7+ Kg8 29.Qf5 a5 30.Ng5 Na6 31.Qf7+ Kh8 32.Qg6 Kg8
33/56-  00:50   393 334 003  7 762 047  +1,81  10.g3 Qxe4+
33/56+  00:51   401 073 920  7 773 804  +1,91  10.g3
33/56+  00:54   428 522 607  7 818 614  +2,05  10.g3
Parent - - By dorszcz (*) Date 2018-12-02 16:33
Yes, it's the hardest but still 4:30 is not bad. Stockfish on my cpu saw this after 30 minutes.
Parent - By user923005 (****) [us] Date 2018-12-03 23:41
The current development SF version doesn't usually see the solution until 46 plies or so, about 10 minutes.
Maybe some new feature makes it harder to solve.
Up Topic The Rybka Lounge / Test Positions / 5 hard positions (III)

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