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Up Topic The Rybka Lounge / Test Positions / 5 hard positions (II)
- - By dorszcz (*) Date 2018-11-21 21:55
r2qr1k1/pppb1pBN/3p1Pp1/2n2R1p/7Q/1P4P1/P5P1/1R4K1 b - - 0 26

r1b2rk1/pp3ppp/1n2p3/3pP3/2PN1BPq/b1PB4/P1Q2P1P/1K1R3R w - - 0 19

4k1N1/2p1n3/3p3p/2PP1pp1/1P1K1P2/6P1/8/8 w - - 0 1

5nq1/1p1p2p1/8/B3p3/k7/5K2/2P2PP1/3Q4 w - - 0 1

1R1R4/r4r1p/3pk2p/p3pq2/8/1p2Q1P1/5P2/6K1 w - - 0 43
Parent - By user923005 (****) [us] Date 2018-11-21 22:02
This one I have previously analyzed:
5nq1/1p1p2p1/8/B3p3/k7/5K2/2P2PP1/3Q4 w - - acd 42; acs 120; bm c4+; c0 "
level: med-11"; c2 "Aser Huerga test set"; c3 "c4+"; c6 Arves.06069; ce 861; pm c4+; pv c4+ Kxa5 Qb3 Qf7+ Ke2 Qh5+ g4 Qxg4+ Kf1 Ka6 Qa4+ Kb6 c5+ Kxc5 Qxg4 Ne6 Qe4 Kd6 Qxb7 Nf4 Qb8+ Kd5 Qc8 Kd6 Qf8+ Kd5 Qxg7 Ke6 Qg4+ Ke7 Qf5 Kd6 Qf6+ Ne6 Qg6 Kd5 Qe8 Nc5 Ke2 Kd4 Qg6 Kd5 Ke3 Ne6 Qf5 Kd6 Qg4 Nc5 Qg6+ Kd5 Qg5 Ne6 Qe7 Nc5 Ke2 d6 Qf7+ Kd4 Qg6 Kd5 Qg4 e4 Qf5+ Kc6 Qc8+ Kd5;
Parent - - By user923005 (****) [us] Date 2018-11-21 22:28
r2qr1k1/pppb1pBN/3p1Pp1/2n2R1p/7Q/1P4P1/P5P1/1R4K1 b - - acd 47; acs 300; bm Re2; c0 "
Bxf5 and Ne4 lose.  Re2 draws."; ce 0; pm Re2; pv Re2 Rxh5 Qe8 Rxc5 Rxg2+ Kxg2 Qe2+ Kg1 Qe3+ Kg2 Qxc5 Ng5 Qc2+ Kf3 Qf5+ Ke3 Re8+ Ne4 Rxe4+ Qxe4 Qxe4+ Kxe4 Bf5+ Kf4 Bxb1 a3 a5 Bh6 Bc2 b4 axb4 axb4 Bd3 Ke3 Bc4 Kd4 Bb5 Ke4 Bc6+ Kd3 Bd7 Ke4 Be6 Kf4 b6 Kf3 Bd5+ Kf4 Bb7 Kg4 b5 Kf4 Bc6 Ke3 g5 Bxg5 Kh7 g4 Kg6 Bh4 Bg2 Kf4 c5 bxc5 dxc5 Bf2 c4;

r1b2rk1/pp3ppp/1n2p3/3pP3/2PN1BPq/b1PB4/P1Q2P1P/1K1R3R w - - acd 36; acs 243; bm Nf3; ce 227; pm Nf3;
pv Nf3 Qd8 c5 Nd7 Bxh7+ Kh8 Ng5 Nxc5 Be3 Qa5 Bxc5 Qxc5 Ka1 f6 Bg8 f5 Bxe6 Qe7 Bxc8 Raxc8 f4 Qb4 Rd3 Qxf4 Ne6 Qxe5 Nxf8 Bxf8 Rh3+ Kg8 Qxf5 Qxf5 gxf5 Be7 Rb1 b6 Rb5 Bc5 Rd3 Kf7 Rxd5 Rh8 Rd7+ Kf6;

5nq1/1p1p2p1/8/B3p3/k7/5K2/2P2PP1/3Q4 w - - acd 42; acs 120; bm c4+; c0 "
level: med-11"; c2 "Aser Huerga test set"; c3 "c4+"; c6 Arves.06069; ce 861; pm c4+; pv c4+ Kxa5 Qb3 Qf7+ Ke2 Qh5+ g4 Qxg4+ Kf1 Ka6 Qa4+ Kb6 c5+ Kxc5 Qxg4 Ne6 Qe4 Kd6 Qxb7 Nf4 Qb8+ Kd5 Qc8 Kd6 Qf8+ Kd5 Qxg7 Ke6 Qg4+ Ke7 Qf5 Kd6 Qf6+ Ne6 Qg6 Kd5 Qe8 Nc5 Ke2 Kd4 Qg6 Kd5 Ke3 Ne6 Qf5 Kd6 Qg4 Nc5 Qg6+ Kd5 Qg5 Ne6 Qe7 Nc5 Ke2 d6 Qf7+ Kd4 Qg6 Kd5 Qg4 e4 Qf5+ Kc6 Qc8+ Kd5;

4k1N1/2p1n3/3p3p/2PP1pp1/1P1K1P2/6P1/8/8 w - - acd 44; acs 139; bm Nxe7; c0 "
Nxh6 is a draw. Nxe7 wins."; ce 32608; pm Nxe7; pv Nxe7 Kxe7 g4 fxg4 f5 g3 Ke3 g4 cxd6+ Kxd6 f6 h5 b5 h4 f7 Ke7 d6+ cxd6 b6 g2 Kf2 h3 b7 g3+ Kg1 Kxf7 b8=Q Ke6 Qc8+ Ke7 Qxh3 Kd8 Kxg2 Kc7;

1R1R4/r4r1p/3pk2p/p3pq2/8/1p2Q1P1/5P2/6K1 w - - acd 31; acs 9; bm Rxd6+; ce 32736; pm Rxd6+;
pv Rxd6+ Kxd6 Qd2+ Kc6 Qc3+ Kd7 Qc8+ Kd6 Rb6+ Kd5 Qc6+ Kd4 Qa4+ Kd3 Rxb3+ Kc2 Rb5+ Kd2 Rb2+ Kc3 Qb3+ Kd4 Rd2+ Qd3 Qxd3+ Kc5 Qc3+ Kb6 Rb2+ Ka6 Qd3+;
Parent - - By dorszcz (*) Date 2018-11-21 22:47
Can I see your analysis after Bxf5 and Ne4?
r2qr1k1/pppb1pBN/3p1Pp1/2n2R1p/7Q/1P4P1/P5P1/1R4K1 b - - 0 26
Parent - - By user923005 (****) [us] Date 2018-11-22 00:12
I was wrong about one move being better.  All three moves draw.  Kind of strange for a test position.

r2qr1k1/ppp2pBN/3p1Pp1/2n2b1p/7Q/1P4P1/P5P1/1R4K1 w - - acd 54; acs 301; bm Qg5; ce 0; pm Qg5;
pv Qg5 Qe7 fxe7 Kxg7 Nf6 Bxb1 Nxh5+ Kh7 Nf6+ Kg7;

r2qr1k1/pppb1pBN/3p1Pp1/5R1p/4n2Q/1P4P1/P5P1/1R4K1 w - - acd 54; acs 1499; bm Rxh5; ce 0; pm Rxh5;
pv Rxh5 gxh5 Qxh5 Nxg3 Qh6 Nf5 Qh5;
Parent - By user923005 (****) [us] Date 2018-11-22 00:15
Corrected results:
r2qr1k1/pppb1pBN/3p1Pp1/2n2R1p/7Q/1P4P1/P5P1/1R4K1 b - - acd 47; acs 300;
bm Re2 Bxf5 Ne4; c0 "Re2 Bxf5 Ne4 all draw."; ce 0; pm Re2; pv Re2 Rxh5 Qe8 Rxc5 Rxg2+ Kxg2 Qe2+ Kg1 Qe3+ Kg2 Qxc5 Ng5 Qc2+ Kf3 Qf5+ Ke3 Re8+ Ne4 Rxe4+ Qxe4 Qxe4+ Kxe4 Bf5+ Kf4 Bxb1 a3 a5 Bh6 Bc2 b4 axb4 axb4 Bd3 Ke3 Bc4 Kd4 Bb5 Ke4 Bc6+ Kd3 Bd7 Ke4 Be6 Kf4 b6 Kf3 Bd5+ Kf4 Bb7 Kg4 b5 Kf4 Bc6 Ke3 g5 Bxg5 Kh7 g4 Kg6 Bh4 Bg2 Kf4 c5 bxc5 dxc5 Bf2 c4;
r1b2rk1/pp3ppp/1n2p3/3pP3/2PN1BPq/b1PB4/P1Q2P1P/1K1R3R w - - acd 36; acs 243; bm Nf3; ce 227; pm Nf3;
pv Nf3 Qd8 c5 Nd7 Bxh7+ Kh8 Ng5 Nxc5 Be3 Qa5 Bxc5 Qxc5 Ka1 f6 Bg8 f5 Bxe6 Qe7 Bxc8 Raxc8 f4 Qb4 Rd3 Qxf4 Ne6 Qxe5 Nxf8 Bxf8 Rh3+ Kg8 Qxf5 Qxf5 gxf5 Be7 Rb1 b6 Rb5 Bc5 Rd3 Kf7 Rxd5 Rh8 Rd7+ Kf6;
5nq1/1p1p2p1/8/B3p3/k7/5K2/2P2PP1/3Q4 w - - acd 42; acs 120; bm c4+; c0 "
level: med-11"; c2 "Aser Huerga test set"; c3 "c4+"; c6 Arves.06069; ce 861; pm c4+; pv c4+ Kxa5 Qb3 Qf7+ Ke2 Qh5+ g4 Qxg4+ Kf1 Ka6 Qa4+ Kb6 c5+ Kxc5 Qxg4 Ne6 Qe4 Kd6 Qxb7 Nf4 Qb8+ Kd5 Qc8 Kd6 Qf8+ Kd5 Qxg7 Ke6 Qg4+ Ke7 Qf5 Kd6 Qf6+ Ne6 Qg6 Kd5 Qe8 Nc5 Ke2 Kd4 Qg6 Kd5 Ke3 Ne6 Qf5 Kd6 Qg4 Nc5 Qg6+ Kd5 Qg5 Ne6 Qe7 Nc5 Ke2 d6 Qf7+ Kd4 Qg6 Kd5 Qg4 e4 Qf5+ Kc6 Qc8+ Kd5;
4k1N1/2p1n3/3p3p/2PP1pp1/1P1K1P2/6P1/8/8 w - - acd 44; acs 139; bm Nxe7; c0 "
Nxh6 is a draw. Nxe7 wins."; ce 32608; pm Nxe7; pv Nxe7 Kxe7 g4 fxg4 f5 g3 Ke3 g4 cxd6+ Kxd6 f6 h5 b5 h4 f7 Ke7 d6+ cxd6 b6 g2 Kf2 h3 b7 g3+ Kg1 Kxf7 b8=Q Ke6 Qc8+ Ke7 Qxh3 Kd8 Kxg2 Kc7;
1R1R4/r4r1p/3pk2p/p3pq2/8/1p2Q1P1/5P2/6K1 w - - acd 31; acs 9; bm Rxd6+; ce 32736; pm Rxd6+;
pv Rxd6+ Kxd6 Qd2+ Kc6 Qc3+ Kd7 Qc8+ Kd6 Rb6+ Kd5 Qc6+ Kd4 Qa4+ Kd3 Rxb3+ Kc2 Rb5+ Kd2 Rb2+ Kc3 Qb3+ Kd4 Rd2+ Qd3 Qxd3+ Kc5 Qc3+ Kb6 Rb2+ Ka6 Qd3+;
Parent - By dorszcz (*) Date 2018-11-22 06:01
So I will remove it from my test suite.
It is an old position that I thought that Re2 wins.
Up Topic The Rybka Lounge / Test Positions / 5 hard positions (II)

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