MoKy wrote:I think for this test are preferable drawn positions. Here is a study by Akobia+Becker 2005 [D]8/8/6p1/7R/b6K/5k2/3n4/2n5 w - - 0 1 bm Rh6=
Trivial for rybka without tablebases
New game
8/8/6p1/7R/b6K/5k2/3n4/2n5 w - - 0 1
Analysis by Rybka 2.3.2a 32-bit :
1.Rh5-h6 Ba4-e8
-+ (-4.23) Depth: 5 00:00:00
1.Rh5-g5 Ba4-e8
-+ (-4.21) Depth: 5 00:00:00
1.Rh5-g5 Ba4-e8 2.Rg5-e5
-+ (-4.17) Depth: 6 00:00:00 1kN
1.Rh5-g5 Ba4-e8 2.Rg5-e5 Be8-f7
-+ (-4.31) Depth: 7 00:00:00 2kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-b5
-+ (-4.25) Depth: 7 00:00:00 2kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-b5 3.Kh4-g5
-+ (-4.39) Depth: 8 00:00:00 3kN
1.Rh5-g5 Ba4-e8 2.Rg5-e5 Be8-f7 3.Re5-e7
-+ (-4.33) Depth: 8 00:00:00 4kN
1.Rh5-g5 Ba4-c2 2.Rg5-c5 Bc2-f5 3.Rc5xc1 Kf3-f4
-+ (-4.49) Depth: 9 00:00:00 8kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-b5 3.Kh4-g5 Bb5-d3
-+ (-4.45) Depth: 9 00:00:00 9kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-b5 3.Kh4-g5 Bb5-d3 4.Rh8-h3+
-+ (-1.95) Depth: 10 00:00:00 15kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-c6 3.Rh8-c8 Bc6-e4 4.Rc8xc1
-+ (-1.91) Depth: 10 00:00:00 21kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-c6 3.Rh8-c8 Bc6-e4 4.Rc8xc1 Kf3-f4
-+ (-1.89) Depth: 11 00:00:00 24kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-d7 3.Rh8-d8 Bd7-f5 4.Rd8xd2 Nc1-e2 5.Rd2-d1
-+ (-1.45) Depth: 12 00:00:01 35kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-d7 3.Rh8-d8 Bd7-f5 4.Rd8xd2 Nc1-e2 5.Rd2-d1 Ne2-g3
-+ (-1.53) Depth: 13 00:00:01 43kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-d7 3.Rh8-d8 Bd7-f5 4.Rd8xd2 Nc1-e2 5.Rd2-d1 Ne2-g3 6.Kh4-g5
-+ (-1.44) Depth: 14 00:00:01 58kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-d7 3.Rh8-d8 Bd7-f5 4.Rd8xd2 Nc1-e2 5.Rd2-d1 Ne2-g3 6.Kh4-g5 Ng3-e4+ 7.Kg5-h6
-+ (-1.60) Depth: 15 00:00:01 80kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-d7 3.Rh8-d8 Bd7-f5 4.Rd8xd2 Nc1-e2 5.Rd2-d1 Ne2-g3 6.Kh4-g5 Ng3-e4+ 7.Kg5-h6 g6-g5
-+ (-1.51) Depth: 16 00:00:03 122kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-d7 3.Rh8-d8 Bd7-f5 4.Rd8xd2 Nc1-e2 5.Kh4-g5 Ne2-c3 6.Kg5-h6 Nc3-e4 7.Rd2-d1 g6-g5
-+ (-1.50) Depth: 17 00:00:05 191kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-d7 3.Rh8-d8 Bd7-f5 4.Rd8xd2 Nc1-e2 5.Kh4-g5 Ne2-c3 6.Kg5-h6 Nc3-e4 7.Rd2-d1 g6-g5
-+ (-1.50) Depth: 18 00:00:08 278kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-d7 3.Rh8-d8 Bd7-f5 4.Rd8xd2 Nc1-e2 5.Kh4-g5 Ne2-c3 6.Kg5-h6 Nc3-e4 7.Rd2-d1 g6-g5
-+ (-1.64) Depth: 19 00:00:12 423kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-d7 3.Rh8-d8 Bd7-f5 4.Rd8xd2 Nc1-e2 5.Rd2-d1 Ne2-g3 6.Rd1-g1 Ng3-e4 7.Rg1-f1+ Kf3-e3
-+ (-1.64) Depth: 20 00:00:19 657kN
1.Rh5-h6 Ba4-e8 2.Rh6-h8 Be8-d7 3.Rh8-d8 Bd7-f5 4.Rd8xd2 Nc1-e2 5.Rd2-d1 Ne2-g3 6.Kh4-g5 Ng3-e4+ 7.Kg5-h6 g6-g5
-+ (-1.70) Depth: 21 00:00:30 990kN
(, 04.02.2008)
And I add the next one by Kekely 2003
[D]3N4/7P/5pK1/1p5B/2k1b3/8/4rn2/8 w - - 0 1 bm Kxf6=
few seconds for rybka without tablebases or glaurung or old Junior with no tablebases
New game
3N4/7P/5pK1/1p5B/2k1b3/8/4rn2/8 w - - 0 1
Analysis by Rybka 2.3.2a 32-bit :
1.Kg6-f7 Be4xh7
µ (-1.40) Depth: 5 00:00:00
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Nf2-d3
µ (-0.97) Depth: 6 00:00:00 2kN
1.Kg6-g7 Be4xh7 2.Bh5xe2+ Bh7-d3
µ (-0.76) Depth: 6 00:00:00 2kN
1.Kg6-g7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Kg7xf6 Kc4-d5
µ (-1.12) Depth: 7 00:00:00 3kN
1.Kg6-g7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Kg7xf6 b5-b4 5.Nd8-c6
µ (-1.39) Depth: 8 00:00:00 6kN
1.Kg6-g7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Kg7xf6 b5-b4 5.Nd8-e6 Kd3-c4
-+ (-2.55) Depth: 9 00:00:00 10kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Nd8-c6 f6-f5 5.Kf7-e6
-+ (-2.20) Depth: 9 00:00:00 11kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Nd8-c6 f6-f5 5.Kf7-e6 f5-f4
-+ (-2.23) Depth: 10 00:00:01 16kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Nd8-b7 b5-b4 5.Kf7-e6 Nf2-e4 6.Nb7-a5
-+ (-2.34) Depth: 11 00:00:01 22kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Kf7-e6 b5-b4 5.Nd8-b7 Nf2-e4 6.Nb7-a5 Kd3-d4
-+ (-2.37) Depth: 12 00:00:01 38kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Kf7-e6 b5-b4 5.Nd8-b7 Nf2-e4 6.Nb7-a5 Kd3-d4 7.Ke6-f5
-+ (-2.26) Depth: 13 00:00:01 53kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Kf7-e6 b5-b4 5.Nd8-b7 Nf2-e4 6.Nb7-a5 Kd3-d4 7.Ke6-f5 Kd4-d5
-+ (-2.27) Depth: 14 00:00:01 74kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Kf7-e6 b5-b4 5.Nd8-b7 Nf2-e4 6.Nb7-a5 Kd3-d4 7.Ke6-f5 Kd4-d5
-+ (-2.27) Depth: 15 00:00:01 106kN
1.Kg6xf6 Nf2-g4+ 2.Bh5xg4 Re2-h2 3.Bg4-e2+ Be4-d3 4.Be2xd3+ Kc4xd3 5.Kf6-g7 b5-b4 6.Nd8-b7 Kd3-d4 7.Nb7-a5 Kd4-c5
µ (-0.73) Depth: 15 00:00:04 250kN
1.Kg6xf6 Nf2-g4+ 2.Bh5xg4 Re2-h2 3.Bg4-e2+ Be4-d3 4.Be2xd3+ Kc4xd3 5.Kf6-g7 b5-b4 6.Nd8-b7 Kd3-d4 7.Nb7-a5 Kd4-c5
µ (-0.73) Depth: 16 00:00:06 380kN
1.Kg6xf6 Nf2-g4+ 2.Bh5xg4 Re2-f2+ 3.Kf6-g7 Be4xh7 4.Kg7xh7 Kc4-d5 5.Bg4-e6+ Kd5-d6 6.Be6-b3 Rf2-f3 7.Bb3-g8 Rf3-c3
µ (-0.83) Depth: 17 00:00:15 973kN
(, 04.02.2008)
New game
3N4/7P/5pK1/1p5B/2k1b3/8/4rn2/8 w - - 0 1
Analysis by Glaurung 2.0.1:
1.Kg6xf6 Be4xh7 2.Bh5xe2+ Nf2-d3
-+ (-2.13) Depth: 2 00:00:00
1.Kg6xf6 Be4xh7 2.Bh5xe2+ Nf2-d3
-+ (-2.13) Depth: 3 00:00:00
1.Kg6xf6 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Nd8-e6
-+ (-1.94) Depth: 4 00:00:00
1.Kg6xf6 Nf2-g4+ 2.Bh5xg4 Re2-h2 3.Bg4-e2+ Kc4-b4 4.Be2xb5 Kb4xb5
-+ (-4.13) Depth: 5 00:00:00
1.Kg6-g7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Kg7xf6 b5-b4
-+ (-2.74) Depth: 5 00:00:00
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Nf2-d3 3.Kf7-g7 Bh7-e4 4.Be2xd3+ Kc4xd3 5.Kg7xf6
-+ (-2.52) Depth: 5 00:00:01
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Kf7xf6 Nf2-e4+ 5.Kf6-e5 b5-b4
-+ (-2.45) Depth: 6 00:00:01 11kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Kf7xf6 b5-b4 5.Nd8-e6 b4-b3
-+ (-2.78) Depth: 7 00:00:01 15kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Kf7xf6 b5-b4 5.Nd8-e6 b4-b3 6.Kf6-f5
-+ (-2.74) Depth: 8 00:00:01 24kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Kf7xf6 Kc4-d5 5.Nd8-e6 b5-b4 6.Ne6-c7+ Kd5-e4 7.Nc7-e6
-+ (-2.43) Depth: 9 00:00:01 47kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Kf7xf6 Kc4-d5 5.Kf6-g5 b5-b4 6.Kg5-f5 b4-b3 7.Nd8-e6
-+ (-2.80) Depth: 10 00:00:01 94kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Kf7xf6 Kc4-d5 5.Nd8-e6 b5-b4 6.Kf6-f5 b4-b3 7.Ne6-c7+ Kd5-c4 8.Nc7-e6
-+ (-2.74) Depth: 11 00:00:01 168kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Kf7xf6 Kc4-d5 5.Nd8-b7 b5-b4 6.Nb7-a5 Nd3-e5 7.Na5-b3 Kd5-c4 8.Nb3-d2+ Kc4-d5
-+ (-2.74) Depth: 12 00:00:01 290kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Kf7xf6 Kc4-d5 5.Nd8-b7 Nd3-c5 6.Nb7-a5 Nc5-e4+ 7.Kf6-f5 b5-b4 8.Na5-b3 Kd5-c4 9.Nb3-a5+ Kc4-d5
-+ (-2.84) Depth: 13 00:00:01 542kN
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Nd8-c6 Nf2-g4 5.Kf7-e6 Kd3-e4 6.Ke6-d6 Ng4-e5 7.Nc6-b4 Ke4-d4 8.Kd6-e6 Kd4-c4 9.Nb4-d5
-+ (-3.01) Depth: 14 00:00:02 1353kN
1.Kg6xf6 Be4xh7 2.Bh5xe2+ Nf2-d3 3.Be2xd3+ Kc4xd3 4.Nd8-e6 b5-b4 5.Kf6-e5 Kd3-c4 6.Ne6-d4 Kc4-c3 7.Nd4-e2+ Kc3-d3 8.Ne2-d4 Bh7-e4 9.Nd4-e6 Kd3-e3
-+ (-1.98) Depth: 14 00:00:04 3924kN
1.Kg6xf6 Be4xh7 2.Bh5xe2+ Nf2-d3 3.Be2-g4 Kc4-c3 4.Nd8-c6 Bh7-e4 5.Bg4-d7 Be4xc6 6.Bd7xc6 b5-b4 7.Bc6-d5 Nd3-f4 8.Bd5-f3 b4-b3 9.Kf6-e5
-+ (-1.94) Depth: 15 00:00:05 5132kN
1.Kg6xf6 Be4xh7 2.Bh5xe2+ Nf2-d3 3.Be2-g4 Kc4-c3 4.Nd8-c6 Bh7-e4 5.Nc6-a7 b5-b4 6.Na7-b5+ Kc3-d2 7.Nb5-d4 Nd3-c5 8.Kf6-e5 Kd2-e3 9.Nd4-f5+ Ke3-d3 10.Nf5-d4
-+ (-1.98) Depth: 16 00:00:06 6501kN
(, 04.02.2008)
New game
3N4/7P/5pK1/1p5B/2k1b3/8/4rn2/8 w - - 0 1
Analysis by Junior 9:
1.Kg6-f7 Be4xh7 2.Bh5xe2+ Bh7-d3
-+ (-3.21) Depth: 3 00:00:00
1.Kg6-g7 Be4xh7 2.Bh5xe2+ Bh7-d3
-+ (-2.78) Depth: 3 00:00:00
1.Kg6xf6 Be4xh7 2.Bh5xe2+ Bh7-d3
-+ (-2.22) Depth: 3 00:00:00 1kN
1.Kg6xf6 Nf2-g4+ 2.Bh5xg4 Re2-h2 3.Bg4-e6+ Kc4-b4 4.Kf6-g7 Rh2xh7+ 5.Kg7-g8
-+ (-4.40) Depth: 6 00:00:00 5kN
1.Kg6-g7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Nf2xd3 4.Kg7xf6 b5-b4
-+ (-2.72) Depth: 6 00:00:00 6kN
1.Kg6-g7!
-+ (-2.42) Depth: 9 00:00:00 20kN
1.Kg6-g7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Kg7xf6 b5-b4 5.Kf6-e5 Kd3-c4
-+ (-1.51) Depth: 9 00:00:00 33kN
1.Kg6-g7!
µ (-1.21) Depth: 12 00:00:00 238kN
1.Kg6-g7 Be4xh7 2.Bh5xe2+ Bh7-d3 3.Be2xd3+ Kc4xd3 4.Kg7xf6 b5-b4 5.Nd8-e6 Nf2-e4+ 6.Kf6-e5 b4-b3 7.Ne6-f4+ Kd3-c4 8.Nf4-d3 Kc4xd3 9.Ke5-d5 b3-b2
-+ (-1.96) Depth: 15 00:00:01 1839kN
1.Kg6xf6 Nf2-g4+ 2.Bh5xg4 Re2-h2 3.Bg4-e2+ Kc4-c5 4.Be2xb5 Kc5xb5 5.h7-h8Q Rh2xh8 6.Nd8-f7
-+ (-1.91) Depth: 15 00:00:03 5535kN
1.Kg6xf6 Nf2-g4+ 2.Bh5xg4 Re2-h2 3.Bg4-e2+ Kc4-c5 4.Be2xb5 Kc5xb5 5.h7-h8Q Rh2xh8 6.Nd8-f7 Rh8-h3 7.Nf7-d6+ Kb5-c5 8.Nd6xe4+ Kc5-d5
-+ (-1.85) Depth: 18 00:00:13 24878kN
(, 04.02.2008)