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Up Topic The Rybka Lounge / Test Positions / Ending win: Stockfish calls itself lost, Lc0 misses it
- - By MrKris (**) Date 2019-08-24 05:15
In the original game Stockfish as black called itself lost, 50...R5c7 {-5.28/30 13secs}, but Lc0 missed the win and drew!
2r5/2r2k1p/1q4p1/3P3P/3pQpP1/5P1K/4R3/4B3 w - - 0 51


Ba5!!, the exchange for 2 pawns down, the deflection bishop sacrifice makes it a rook for 2 pawns down.

Then black returned material but its 2 rooks lost vs. white's Q and advanced d and h pawns.

It does not seem to be very hard at all, the new Xiphos took 99 seconds, Lc0 found it in 12 seconds after the game, other nets except the old badgyal-4a.pb.gz found it quickly.

In the replay, Stockfish instead of Lc0 as white, found it and Lc0 as black could not find a defense.

[Event "Lc0 missed 51.Ba5!!"]
[Site "Replay, G/5'+2''"]
[Date "2019.08.23"]
[Round "?"]
[White "Stockfish_19082110c0"]
[Black "Lc0-0.22.0_T40B.2-106"]
[Result "1-0"]
[BlackElo "2200"]
[Time "20:21:56"]
[WhiteElo "2200"]
[TimeControl "300+2"]
[SetUp "1"]
[FEN "2r5/2r2k1p/1q4p1/3P3P/3pQpP1/5P1K/4R3/4B3 w - - 0 51"]
[Termination "normal"]
[PlyCount "60"]
[WhiteType "program"]
[BlackType "program"]

51. Ba5 {!! +4.97/38 17 ---Stockfish, even at 5|2---}
( {---the original game, Lc0 1/2-1/2 Stockfish, continued:} 51. h6 {?? +0.44/22 11} d3 {! 0.00/24 1} 52. Qxd3 {+0.43/25
0} Qg1 {0.00/31 2} 53. Kh4 {+0.38/25 7} Rg8 {0.00/30 1} 54. Kg5 {+0.37/26
0} Qc5 {0.00/30 1} 55. Bf2 {+0.35/23 2} Qd6 {0.00/30 1} 56. Re6 {+0.16/20
9} Qd8+ {0.00/31 1} 57. Kxf4 {+0.13/21 3} Qb8 {0.00/33 1} 58. Kg5 {+0.09/20
11} Qd8+ {0.00/34 1} 59. Kf4 {+0.07/20 0} Qb8 {0.00/37 1} 60. Re5 {+0.08/18
0} Re7 {0.00/31 1} 61. d6 {+0.08/18 0} Rxe5 {0.00/34 1} 62. Kxe5 {+0.07/17
1} Re8+ {0.00/35 2} 63. Kf4 {+0.06/15 1} Qb4+ {0.00/36 1} 64. Kg3 {+0.03/13
2} Re6 {0.00/39 4} 65. Kg2 {+0.02/11 10} Qxd6 {0.00/39 1} 66. Qc3 {+0.02/10
6} Qe5 {0.00/39 1} 67. Qc2 {+0.02/9 6} Qd5 {0.00/34 1} 68. Qc3 {+0.04/9 3}
Qe5 {0.00/39 1} 69. Qd3 {+0.02/8 1} g5 {0.00/41 1} 70. Qxh7+ {+0.23/9 1}
Kf8 {0.00/42 1 drawn on move 136. Stalemate because Lc0 kept its evaluation above 0.00, Arena---} )
Qxa5 {-2.08/18 20} 52. Qe6+ {+4.97/42 11} Kf8
{-2.19/19 23} 53. d6 {+8.00/44 38} Qa1 {-2.32/21 80} 54. Re1 {+8.60/33 7}
Qxe1 {-2.32/20 0} 55. Qxe1 {+9.07/35 7} Rg7 {-2.34/20 20} 56. h6 {+10.09/33
7} Rd7 {-2.40/19 13} 57. Qe5 {+11.62/31 9} Kf7 {-2.43/17 36} 58. Qd5+
{+12.98/31 8} Kf8 {-2.44/18 0} 59. Qxd4 {+14.40/36 27} Kf7 {-2.46/17 29}
60. Qd5+ {+15.01/31 4} Kf8 {-2.47/19 0} 61. Qe5 {+18.08/35 29} Kf7
{-2.43/16 45} 62. g5 {+19.21/35 10} Rcd8 {-2.29/16 64} 63. Qf6+ {+20.22/33
7} Kg8 {-2.22/14 7} 64. Kg4 {+23.60/33 6} Re8 {-2.26/14 6} 65. Qxf4
{+62.43/31 6} Rf7 {-2.32/13 11} 66. Qd4 {+148.92/45 13} Rd7 {-2.39/11 19}
67. f4 {+148.93/46 12} Rf7 {-2.41/12 3} 68. Qc5 {+148.96/48 6} Rd8
{-2.62/11 15} 69. Qe5 {+148.99/46 20} Rfd7 {-2.84/11 3} 70. f5 {+149.00/46
4} gxf5+ {-3.10/10 2} 71. Kxf5 {+M19/52 25} Rf7+ {-3.88/10 11} 72. Kg4
{+M17/57 7} Rfd7 {-4.25/8 3} 73. Qf6 {+M15/68 11} Re8 {-5.83/7 6} 74. g6
{+M14/76 4} Re1 {-7.84/5 4} 75. g7 {+M10/74 4} Re4+ {-3.71/8 4} 76. Kg5
{+M9/92 4} Re8 {-128.00/2 3} 77. Qd4 {+M8/112 4} Red8 {-128.00/2 3} 78.
Qd5+ {+M5/245 1} Rf7 {-128.00/2} 79. d7 {+M4/245 0} Rxd7 {-128.00/2 5} 80.
Qa8+ {+M3/245 0} Rf8 {-128.00/2 4 Black resigns} 1-0
FEN: 2r5/2r2k1p/1q4p1/3P3P/3pQpP1/5P1K/4R3/4B3 w - - 2 51
Xiphos-0.5.4:
... 41  00:18   214,345k  11,697k  +1.00  51.Bf2 Qd6 52.Bxd4 Re7 53.Be5 Qxe5 54.Qxe5 Rxe5 55.Rxe5 Rc3 56.Kg2 Rc2+ 57.Kf1 Rd2 58.Ke1 Rd4 59.hxg6+ hxg6 60.Re4 Rxd5 61.Rxf4+ Kg7 62.Kf2 g5 63.Rb4 Re5 64.Rc4 Rb5 65.Ra4 Kf6 66.Kg3 Rc5 67.Rd4 Rb5 68.Rc4 Kf7 69.Rc7+ Kf6 70.Rc6+ Kf7 71.Rc8
 42  01:39   1,205,527k  12,173k  +3.78  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 Qxe2 55.Qxe2 Rg7 56.Qe5 Re8 57.Qxd4 Kg8 58.Qxf4 Rf7 59.Qc4 Rd8 60.Qe6 Kf8 61.Qe5 Kg8 62.Kh4 Rfd7 63.h6 Kf7 64.Kh3 Kg8 65.f4 Rf7 66.f5 gxf5 67.gxf5 Rfd7 68.Kg4 Rf7 69.Qd4 Re8 70.Qf4 Rb7 71.Qc4+ Rf7 72.Qd5 Rd8 73.Kh3 Kf8
 43  02:08   1,574,074k  12,259k  +4.23  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa1 54.Re1 Qxe1 55.Qxe1 Rg7 56.Qe5 Re8 57.Qxf4+ Kg8 58.Qxd4 Rf7 59.Kh4 Rd7 60.Qd5+ Kf8 61.f4 gxh5 62.gxh5 h6 63.Qd4 Kg8 64.Qd3 Rg7 65.Kh3 Kh8 66.Qc3 Kh7 67.f5 Kg8 68.f6 Rd7 69.Qd4 Red8 70.Qg4+ Kf8 71.Qg6 Rf7 72.Qxh6+ Ke8 73.Qe3+ Kf8

FEN: 2r5/2r2k1p/1q4p1/3P3P/3pQpP1/5P1K/4R3/4B3 w - - 2 51
Komodo-10.1-64bit:
... 30  00:38   442,670k  11,563k   0.00  51.Bd2 d3 52.Re1 Kg8 53.d6 Qxd6 54.Bxf4 Qc6 55.Bxc7 Qxe4 56.Rxe4 Rxc7 57.hxg6 hxg6 58.Rd4 Rc3 59.Kg3 Kf7 60.Kf4 Ke6 61.Rd8 Ke7 62.Rd5 Ke6 63.Rd4 Rb3 64.Rd8 Ke7 65.Rd5 Ke6 66.Rd4 Rc3
 30+  00:48   559,783k  11,628k  +0.06  51.Ba5 Qxa5 52.Qe6+
 30+  01:21   979,935k  11,978k  +1.86  51.Ba5 Qxa5 52.Qe6+
 30  01:27   1,058,040k  12,024k  +2.44  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Qd5+ Kh7 62.Qe4+ Kg8 63.Kg2 Rf7 64.Qe8+ Rf8 65.Qe5 Qb7 66.Qxd4 Qf7 67.Re5 Qf6 68.Qd5+ Kg7 69.Rg5+ Kh8 70.Rh5+ Kg7 71.Qd3 Qg6 72.Qd7+ Rf7 73.Qd5 Qf6 74.g5 Qb2+ 75.Kh3 Rb7 76.Qe4 Kf8 77.g6 Ra7 78.Qf5+ Ke8 79.Qc8+
 31+  01:35   1,160,116k  12,090k  +2.50  51.Ba5 Qxa5 52.Qe6+
 31  01:38   1,195,573k  12,118k  +2.47  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 Qxe2 55.Qxe2 Rg7 56.Qe5 Re8 57.Qxf4+ Rf7 58.Qxd4 Kg8 59.f4 Rd8 60.Qe5 Rfd7 61.h6 Rf7 62.Kh4 Ra8 63.Qd5 Re8 64.f5 gxf5 65.gxf5 Ref8 66.Qe5 Rd8 67.Kg5 Ra8 68.Qd5 Re8 69.Qd4 Rd7 70.Qc4+ Rf7 71.d7

FEN: 2r5/2r2k1p/1q4p1/3P3P/3pQpP1/5P1K/4R3/4B3 w - - 2 51
Lc0-0.22.0_T40B.2-106:
... 17/49  00:11   126k  11k  +0.59  51.h6 d3 52.Qxd3 Qg1 53.Kh4 Rg8 54.Kg5 Qc5 55.Bf2 Qc3 56.Qa6 Re8 57.Rxe8 Kxe8 58.d6 Qe5+ 59.Kh4 Rd7 60.Qc8+ Rd8 61.d7+ Ke7 62.Kh3 Qa1 63.Qc5+ Kxd7 64.Qd5+ Kc8 65.Qc6+ Kb8 66.Qb5+ Kc8 67.Qc4+ Kb7 68.Qe4+ Kc8 69.Qc6+ Kb8
 17/49  00:12   145k  11k  +1.66  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Qd5+ Kh7 62.Qe4+ Kg8 63.Kg2 Rf7 64.Rd2 d3 65.Qxd3 Qxd3 66.Rxd3 Kg7 67.Rd6 Rf8 68.Rd4
 18/49  00:15   202k  13k  +1.90  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Qd5+ Kh7 62.Qe4+ Kg8 63.Kg2 Rf7 64.Rb2 Qf6 65.Rb5 Re7 66.Qa8+ Kg7 67.Rh5 Kg6 68.Qg8+ Qg7 69.Qd5 Qf6 70.Kh3 Re1
 18/49  00:20   308k  15k  +2.03  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Qd5+ Kh7 62.Qe4+ Kg8 63.Kg2 Rf7 64.Rb2 Qf6 65.Rb5 Re7 66.Qa8+ Kg7 67.Rh5 Kg6 68.Qg8+ Qg7 69.Qd5 Qf6 70.Kh3 Re1 71.Qg8+
 18/49  00:22   354k  16k  +2.05  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Qd5+ Kh7 62.Qe4+ Kg8 63.Kg2 Rf7 64.Rb2 Qf6 65.Rb5 Re7 66.Qa8+ Kg7 67.Rh5 Kg6 68.Qg8+ Qg7 69.Qd5 Qf6 70.Kh3 Re1 71.Qg8+

FEN: 2r5/2r2k1p/1q4p1/3P3P/3pQpP1/5P1K/4R3/4B3 w - - 2 51
Allie_0.4_T40B.2-106:
... 17/55  00:17   974k  55k  +0.96  51.h6 d3 52.Qxd3 Qg1 53.Kh4 Rg8 54.Kg5 Qc5 55.Bf2 Qc3 56.Qa6 Re8 57.Rxe8 Kxe8 58.d6 Qe5+ 59.Kh4 Rd7 60.Qc8+ Rd8 61.Qc6+ Rd7 62.Qc8+ Rd8 63.d7+ Ke7 64.Bc5+ Kf7 65.Qxd8 Qe1+ 66.Kg5 Qe5+ 67.Kh4 Qe1+ 68.Bf2 Qxf2+ 69.Kg5 Qc5+ 70.Kh4 Qf2+ 71.Kg5 Qc5+ 72.Kxf4 g5+ 73.Ke4 Qc4+ 74.Ke3 Qf4+
 17/55  00:18   1,032k  55k  +0.92  51.Ba5 Qxa5 52.Qe6+ Kg7 53.h6+ Kxh6 54.Qe5 Qa8 55.g5+
 17/55  00:21   1,148k  54k  +2.69  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.dxc7 hxg4+ 56.fxg4 Rxc7 57.Qh8+ Kf7 58.Qxh7+ Kf8 59.Qh8+ Kf7 60.Qh7+
 17/55  00:23   1,300k  55k  +3.44  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Kg2 Qd3 62.Qd5+ Kg7 63.Qe5+ Kg8
 17/55  00:26   1,486k  57k  +3.97  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kf8 60.dxc7 Rxc7 61.Qh8+ Kf7 62.Re1 Ra7 63.Qh5+

FEN: 2r5/2r2k1p/1q4p1/3P3P/3pQpP1/5P1K/4R3/4B3 w - - 2 51
Leelafish-v0.8_T40B.2-106 w/Sf 4-threads:
... 19/49  00:41   637k  15k  +0.58  51.Bf2 Qd6 52.Bxd4 Re7 53.Be5 Qxe5 54.Qxe5 Rxe5 55.Rxe5 Rc3 56.Kh4 Rxf3 57.Kg5 Rd3 58.Kxf4 Rd4+ 59.Ke3 Rxg4 60.h6 Rg1 61.Kd4 Rh1 62.d6 Rxh6 63.d7 Rh1 64.Kd5 Rd1+ 65.Kc6 Rc1+ 66.Kb6 Rd1 67.Kc7 Rc1+ 68.Kd8 h5
 19/49  00:46   734k  16k  +5.02  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Qd5+ Kh7 62.Qe4+ Kg8 63.Kg2 Rf7 64.Rb2 Qf6 65.Rb5 Re7 66.Qa8+ Kg7 67.Rh5 Kg6 68.Qg8+ Qg7 69.Qd5 Qf6 70.Kh3 Re1 71.Qg8+
 19/49  00:51   836k  16k  +5.36  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Qd5+ Kh7 62.Qe4+ Kg8 63.Kg2 Rf7 64.Rb2 Qf6 65.Rb5 Re7 66.Qa8+ Kg7 67.Rh5 Kg6 68.Qg8+ Qg7 69.Qc8 Re5 70.Qc2+ Kf6 71.Qc6+
 19/49  00:56   955k  17k  +5.69  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Qd5+ Kh7 62.Qe4+ Kg8 63.Kg2 Rf7 64.Rb2 Qf6 65.Rb5 Re7 66.Qa8+ Kg7 67.Rh5 Kg6 68.Qg8+ Rg7 69.Qe8+ Rf7 70.Qe4+ Kg7 71.Qh7+ Kf8 72.Qd3 Kg7
 20/49  00:58   996k  17k  +5.69  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Qd5+ Kh7 62.Qe4+ Kg8 63.Kg2 Rf7 64.Rb2 Qf6 65.Rb5 Re7 66.Qa8+ Kg7 67.Rh5 Kg6 68.Qg8+ Rg7 69.Qe8+ Rf7 70.Qe4+ Kg7 71.Qh7+ Kf8 72.Qd3 Kg7
 20/49  00:59   1,022k  17k  +5.75  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Qd5+ Kh7 62.Qe4+ Kg8 63.Kg2 Rf7 64.Rb2 Qf6 65.Rb5 Re7 66.Qa8+ Kg7 67.Rh5 Kg6 68.Qg8+ Rg7 69.Qe8+ Rf7 70.Qe4+ Kg7 71.Qh7+ Kf8 72.Qd3 Kg7

FEN: 2r5/2r2k1p/1q4p1/3P3P/3pQpP1/5P1K/4R3/4B3 w - - 2 51
Lc0--0.21.4_badgyal-4a.pb.gz:
... 23/40  01:08   4,837k  71k  +0.58  51.Bf2 Qd6 52.Bxd4 Re7 53.Be5 Qxe5 54.Qxe5 Rxe5 55.Rxe5 Rc3 56.Kg2 Kf6 57.Re6+ Kg5 58.Kf2 Rd3 59.hxg6 hxg6 60.d6 Rd1 61.Ke2 Rd5 62.Kf1 Rd2 63.Ke1 Rd3 64.Ke2 Rd5 65.Ke1 Rd3 66.Kf2 Rd2+ 67.Kf1 Rd3 68.Ke2 Rd5
 23/40  01:12   5,116k  70k  +0.58  51.Bf2 Qd6 52.Bxd4 Re7 53.Be5 Qxe5 54.Qxe5 Rxe5 55.Rxe5 Rc3 56.Kg2 Kf6 57.Re6+ Kg5 58.Kf2 Rd3 59.hxg6 hxg6 60.d6 Rd1 61.Ke2 Rd5 62.Kf1 Rd2 63.Ke1 Rd3 64.Ke2 Rd5 65.Ke1 Rd3 66.Kf2 Rd2+ 67.Kf1 Rd3 68.Ke2 Rd5
Parent - - By dorszcz (**) Date 2019-08-24 17:03
Nice position, but easy for some engines.

Strockfish found it in 39 seconds, Xiphos in 32, Critter in 2, spark in 0, IvanHoe in 2.

Analysis by Stockfish 10 64 POPCNT:

1.Ba5
  =  (0.19 !)   Depth: 32/51   00:00:39  90535kN
1.Ba5
  +/=  (0.28 !)   Depth: 32/51   00:00:40  90968kN
1.Ba5
  +/=  (0.43 !)   Depth: 32/51   00:00:40  92124kN
1.Ba5
  +/=  (0.63 !)   Depth: 32/51   00:00:41  93488kN
1.Ba5
  +/-  (0.90 !)   Depth: 32/51   00:00:41  94089kN
1.Ba5
  +/-  (1.27 !)   Depth: 32/51   00:00:41  95060kN
1.Ba5
  +-  (1.75 !)   Depth: 32/51   00:00:42  95993kN
1.Ba5
  +-  (2.37 !)   Depth: 32/61   00:00:42  97586kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Kg2 Qc6 12.Qxd4 Rg7 13.Qxf4 Rf7 14.Qg5+ Kf8 15.Qe3 Kg7 16.Qe5+ Qf6 17.Qd5 Re7 18.Rxe7+ Qxe7 19.Kg3 Kf8
  +-  (2.30)   Depth: 32/61   00:00:43  98216kN
1.Ba5
  +-  (2.40 !)   Depth: 33/50   00:00:44  101mN
1.Ba5
  +-  (2.50 !)   Depth: 33/50   00:00:46  107mN
1.Ba5
  +-  (2.64 !)   Depth: 33/50   00:00:48  111mN
1.Ba5
  +-  (2.84 !)   Depth: 33/59   00:00:49  113mN
1.Ba5
  +-  (3.12 !)   Depth: 33/59   00:00:50  116mN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qe4+ Kg8 13.Kg2 Qc6 14.Qxd4 Rg7 15.Qxf4 Rf7 16.Qe3 Qf6 17.Re1 Kf8 18.Kg3 Re7 19.Qxe7+ Qxe7 20.Rxe7 Kxe7 21.g5 Kd6 22.f4
  +-  (3.12)   Depth: 33/59   00:00:50  117mN

Analysis by Xiphos 0.5.3 SSE:

1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Kg7 4.dxc7 Rxc7 5.Qd6 Rf7 6.hxg6 hxg6 7.Qxd4+ Kh7 8.Re8 Rg7 9.Qf6 g5 10.Qf8 Qd5 11.Qf5+ Qxf5 12.gxf5 Kh6 13.Kg4 Rb7 14.Re6+ Kg7 15.Kxg5 Kf7 16.Rc6 Ke7 17.Rc3 Rb1 18.Kxf4 Kd6 19.Kg5 Rg1+ 20.Kf4
  +-  (2.28)   Depth: 35   00:00:32  293mN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.gxh5 Qxe2 6.Qxe2 Rd7 7.Qe5 Rcd8 8.Qxf4+ Kg8 9.Qg4+ Kf7 10.Qf5+ Ke8 11.Qe4+ Kf7 12.Qxh7+ Kf6 13.Qg6+ Ke5 14.Qe4+ Kxd6 15.Qxd4+ Ke7 16.Qg7+ Ke8 17.Qg8+ Ke7 18.Qg5+ Ke8 19.h6 Rf7 20.Kg4 Rdd7 21.Qe5+
  +-  (3.03)   Depth: 36   00:00:40  375mN

Analysis by Critter 1.6a 64-bit:

1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa1 4.dxc7 Qh1+ 5.Rh2 Qxf3+ 6.Kh4 Rxc7 7.Qf6+ Rf7 8.Qd8+ Kg7 9.Qxd4+ Kg8 10.hxg6 Qg3+ 11.Kg5 Qxh2 12.gxf7+ Kxf7 13.Qd7+ Kg8 14.Qe8+ Kg7 15.Qe7+ Kg8 16.Qe6+ Kf8 17.Qd6+ Kg8 18.Qe6+
  =  (0.08)   Depth: 15/42   00:00:02  17154kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa1 4.dxc7 Qh1+ 5.Rh2 Qxf3+ 6.Kh4 Rxc7 7.Qf6+ Rf7 8.Qd8+ Kg7 9.Qxd4+ Kg8 10.hxg6 Qg3+ 11.Kg5 Qxh2 12.gxf7+ Kxf7 13.Qd7+ Kg8 14.Qe8+ Kg7 15.Qe5+ Kg8 16.Qb8+ Kf7 17.Qb7+ Ke6 18.Qb3+ Kd6 19.Qb4+ Kd5 20.Qxf4 h6+ 21.Kf5 Qc2+ 22.Kf6
  =  (0.16 !)   Depth: 16/42   00:00:02  19333kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa1 4.dxc7 Qh1+ 5.Rh2 Qxf3+ 6.Kh4 Rxc7 7.Qf6+ Rf7 8.Qd8+ Kg7 9.Qxd4+ Kg8 10.hxg6 Qg3+ 11.Kg5 Qxh2 12.gxf7+ Kxf7 13.Qd7+ Kg8 14.Qe8+ Kg7 15.Qe5+ Kg8 16.Qb8+ Kf7 17.Qb7+ Ke6 18.Qb3+ Kd6 19.Qb4+ Kd5 20.Qxf4 h6+ 21.Kf5 Qc2+ 22.Kf6
  +/=  (0.29 !)   Depth: 16/42   00:00:02  20082kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa1 4.dxc7 Qh1+ 5.Rh2 Qxf3+ 6.Kh4 Rxc7 7.Qf6+ Rf7 8.Qd8+ Kg7 9.Qxd4+ Kg8 10.hxg6 Qg3+ 11.Kg5 Qxh2 12.gxf7+ Kxf7 13.Qd7+ Kg8 14.Qe8+ Kg7 15.Qe5+ Kg8 16.Qb8+ Kf7 17.Qb7+ Ke6 18.Qb3+ Kd6 19.Qb4+ Kd5 20.Qxf4 h6+ 21.Kf5 Qc2+ 22.Kf6
  +/=  (0.48 !)   Depth: 16/42   00:00:02  23139kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qb6 4.Re4 Kg7 5.Qe5+ Kg8 6.dxc7 Qxc7 7.Qe6+ Kh8 8.hxg6 hxg6 9.Qxg6 d3 10.Qf6+ Qg7 11.Qxf4
  +/=  (0.61)   Depth: 16/53   00:00:03  30547kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qb6 4.Re4 Kg7 5.Qe5+ Kg8 6.dxc7 Qxc7 7.Qe6+ Kh8 8.hxg6 hxg6 9.Qxg6 d3 10.Rd4 Qh7+ 11.Qxh7+ Kxh7 12.Rxd3 Kg6 13.Rd6+ Kg5 14.Rd5+ Kg6 15.Rf5 Rc4 16.Kh4 Rd4
  +/=  (0.70 !)   Depth: 17/53   00:00:03  33174kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qe4+ Kg8 13.Kg2 Qf6 14.Qd5+ Kg7 15.g5
  +/=  (0.53)   Depth: 17/53   00:00:04  39699kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qe4+ Kg8 13.Kg2 Qf6 14.Qd5+ Kg7 15.g5 Qb6 16.Qe5+ Kg6 17.Qxf4 Rc5 18.Qe4+ Kxg5 19.Qxd4
  +/=  (0.62 !)   Depth: 18/53   00:00:05  48049kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qe4+ Kg8 13.Kg2 d3 14.Qd5+ Kh7 15.Rd2 Qa1 16.Rxd3 Qb2+ 17.Kh3
  +/-  (0.75 !)   Depth: 18/53   00:00:05  51491kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qg5+ Kh7 12.Qf5+ Qg6 13.Qe5 Qb6 14.Qxf4 Qh6+ 15.Kg3 Qxf4+ 16.Kxf4 Rf7+ 17.Kg3 Rd7 18.Rd2 Rd6 19.f4 Kg6 20.Kf3 d3 21.Ke3
  +/-  (0.79)   Depth: 18/53   00:00:07  62692kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qg5+ Kh7 12.Qf5+ Qg6 13.Qe5 Qb6 14.Qxf4 Qh6+ 15.Qxh6+ Kxh6 16.Rd2 Rc4
  +/-  (0.87 !)   Depth: 19/53   00:00:09  84674kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qg5+ Kh7 12.Qf5+ Qg6 13.Qe5 Qc6 14.Qxf4 Qh6+ 15.Kg3 Qxf4+ 16.Kxf4 Rf7+ 17.Kg3 Rd7 18.Rd2 Kg6 19.Kf4 Rf7+ 20.Ke4 Re7+ 21.Kxd4 Kg5 22.Rd3 Kf4 23.Kc5 Rc7+ 24.Kd6
  +/-  (1.00 !)   Depth: 19/56   00:00:11  104mN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.dxc7 hxg4+ 8.Kxg4 Rxc7 9.Qh8+ Kf7 10.Qe8+ Kg7 11.Re7+ Rxe7 12.Qxe7+ Kg6 13.Qe8+ Kg7 14.Qe7+
  +/-  (1.19 !)   Depth: 19/62   00:00:15  139mN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.dxc7 hxg4+ 8.Kxg4 Rxc7 9.Qh8+ Kf7 10.Qe8+ Kg7 11.Re7+ Rxe7 12.Qxe7+ Kg6 13.Qe8+ Kg7 14.Qe7+
  +/-  (1.19)   Depth: 19/62   00:00:15  146mN

Analysis by spark-1.0-win64-mp-corei:

1.Ba5 Qxa5
  =/+  (-0.48 !)   Depth: 8/18   00:00:00  178kN
1.Ba5 Qxa5
  =  (-0.23 !)   Depth: 8/18   00:00:00  180kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.Qf6+ Kg8 4.Qe6+ Kg7 5.Qe5+ Kf7 6.Qe6+
  =  (0.00)   Depth: 8/18   00:00:00  182kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.Qf6+ Kg8 4.Qe6+ Kg7 5.Qe5+ Kf7 6.Qe6+
  =  (0.00)   Depth: 9/18   00:00:00  208kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.Qf6+ Kg8 4.Qe6+ Kg7 5.Qe5+ Kf7 6.Qe6+
  =  (0.00)   Depth: 10/20   00:00:00  438kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.Qf6+ Kg8 4.Qe6+ Kg7 5.Qe5+ Kf7 6.Qe6+
  =  (0.00)   Depth: 11/23   00:00:00  995kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.Qf6+ Kg8 4.Qe6+ Kg7 5.Qe5+ Kf7 6.Qe6+
  =  (0.00)   Depth: 12/28   00:00:00  2491kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.Qf6+ Kg8 4.Qe6+ Kf8
  =  (0.00)   Depth: 13/32   00:00:01  8316kN
1.Ba5 Qxa5
  =  (0.25 !)   Depth: 14/35   00:00:01  14313kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.dxc7 hxg4+ 6.Kxg4 Qg6+ 7.Kxf4 Qf7+ 8.Kg4 Rxc7 9.Qd6+ Kg8 10.Qd8+ Kg7 11.Qxd4+ Kh6
  =  (0.13)   Depth: 14/35   00:00:01  16954kN
1.Ba5 Qxa5
  +/=  (0.38 !)   Depth: 15/35   00:00:02  22471kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 Kg8 5.dxc7 Qc6 6.Re4 d3 7.Qd4 gxh5 8.gxh5 Qxc7 9.Qxd3
  =  (0.17)   Depth: 15/36   00:00:02  25946kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 Kg8 5.dxc7 Qc6 6.Rb2 Qxc7 7.Qxd4 Rd8 8.Qf6 Rd3 9.Kg2 gxh5 10.gxh5
  =  (0.21)   Depth: 16/40   00:00:04  41721kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 Kg8 5.dxc7 Qc6 6.Rb2 Qxc7 7.Qd5+ Qf7 8.Qxd4 gxh5 9.Rg2 h4 10.Kxh4 Qe7+ 11.Kh3
  +/=  (0.28)   Depth: 17/42   00:00:08  88298kN
1.Ba5 Qxa5
  +/=  (0.53 !)   Depth: 18/42   00:00:13  132mN
1.Ba5 Qxa5
  +/-  (0.78 !)   Depth: 18/42   00:00:13  137mN

Analysis by IvanHoe 9.46b x64:

1.Ba5
  =  (0.19 !)   Depth: 18   00:00:02  27424kN
1.Ba5
  +/=  (0.27 !)   Depth: 18   00:00:02  29469kN
1.Ba5
  +/=  (0.39 !)   Depth: 18   00:00:03  32564kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qf5+ Qg6 13.Qe5 Rd7 14.Rh2 Kg8 15.Qb8+ Kg7 16.Qxf4 d3 17.Kg3 Qd6 18.Rd2 Qc5
  +/=  (0.47)   Depth: 18   00:00:03  38180kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qf5+ Qg6 13.Qe5 Rd7 14.Rh2 Kg8 15.Qb8+ Kg7 16.Qxf4 d3 17.Kg3 Qd6 18.Rd2 Qc5
  +/=  (0.47)   Depth: 18   00:00:03  39034kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qf5+ Qg6 13.Qe5 Rd7 14.Rh2 Kg8 15.Qb8+ Kg7 16.Qxf4 d3 17.Kg3 Qd6 18.Rd2 Qc5
  +/=  (0.55 !)   Depth: 19   00:00:04  45599kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qf5+ Qg6 13.Qe5 Rd7 14.Rh2 Kg8 15.Qb8+ Kg7 16.Qxf4 d3 17.Kg3 Qd6 18.Qxd6 Rxd6 19.Rd2 Kf6 20.Kf4 Rd7
  +/=  (0.63 !)   Depth: 19   00:00:05  54036kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qf5+ Qg6 13.Qe5 Rd7 14.Rh2 Kg8 15.Qb8+ Kg7 16.Qxf4 d3 17.Kg3 Qd6 18.Qxd6 Rxd6 19.Rd2 Kf6 20.Kf4 Rd7
  +/-  (0.75 !)   Depth: 19   00:00:06  64788kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qf5+ Qg6 13.Qe5 Rd7 14.Rh2 Kg8 15.Qb8+ Kg7 16.Qxf4 d3 17.Kg3 Qd6 18.Qxd6 Rxd6 19.Rd2 Kf6 20.Kf4 Rd7
  +/-  (0.93 !)   Depth: 19   00:00:07  78276kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qe4+ Kg8 13.Kg2 Ra7 14.Rd2 Qf6 15.Qxd4 Qxd4 16.Rxd4 Rf7 17.Kf2 Kg7 18.Ke2 Kg6 19.Kd3 Kg5 20.Rd5+ Kg6
  +/-  (0.84)   Depth: 19   00:00:07  81642kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qe4+ Kg8 13.Kg2 Ra7 14.Rd2 Qf6 15.Qxd4 Qxd4 16.Rxd4 Rf7 17.Kf2 Kg7 18.Ke2 Kg6 19.Kd3 Kg5 20.Rd5+ Kg6
  +/-  (0.84)   Depth: 19   00:00:08  83217kN
1.Ba5 Qxa5 2.Qe6+ Kf8 3.d6 Qa6 4.Qe5 gxh5 5.Qh8+ Kf7 6.Qxh7+ Kf8 7.Qh8+ Kf7 8.Qxh5+ Kg7 9.Qe5+ Kg8 10.dxc7 Rxc7 11.Qd5+ Kh7 12.Qe4+ Kg8 13.Kg2 Ra7 14.Rd2 Qf6 15.Qxd4 Qxd4 16.Rxd4 Rf7 17.Kf2 Kg7 18.Ke2 Kg6 19.Kd3 Kg5 20.Rd5+ Kg6 21.Ke4
  +/-  (0.92 !)   Depth: 20   00:00:09  98706kN
Parent - By Vinvin (***) Date 2019-08-25 15:16
And Crystal, 3 runs : 11 secondes average (6*4GHz).

Crystal-x64-mingw:
Found 511 tablebases
...
24/24  00:03   11 005 638  2 843 099   0,00  51.Bf2 Qd6 52.Bxd4 Re7 53.Be5 Qxe5 54.Qxe5 Rxe5 55.Rxe5 Rc3 56.Kg2 Rd3 57.Kf2 Kf6 58.Re6+ Kf7
25/26+  00:07   19 794 312  2 803 726  +0,10  51.Ba5
25/26+  00:07   20 368 314  2 834 443  +0,21  51.Ba5
25/104+  00:11   35 168 099  2 955 799  +1,76  51.Ba5

Crystal-x64-mingw:
Found 511 tablebases
...
23/18  00:06   35 608 184  5 346 574   0,00  51.h6 d3 52.Qxd3 Qg1 53.Kh4 Rg8 54.Kg5 Qc5 55.Bf2 Qd6 56.Re6 Qd8+ 57.Kxf4 Qb8 58.Kg5 Qd8+
24/33+  00:12   65 188 494  5 061 218  +0,10  51.Ba5
24/33+  00:12   65 682 188  5 067 679  +0,21  51.Ba5
24/103+  00:16   84 613 116  5 072 728  +2,41  51.Ba5
24/103  00:18   92 911 108  5 082 108  +2,34  51.Ba5 Qxa5 52.Qe6+ Kf8 53.d6 Qa6 54.Qe5 gxh5 55.Qh8+ Kf7 56.Qxh7+ Kf8 57.Qh8+ Kf7 58.Qxh5+ Kg7 59.Qe5+ Kg8 60.dxc7 Rxc7 61.Kg2 Qc6 62.Qxd4 Rg7 63.Qxf4 Rf7 64.Qg5+ Kh7 65.Kg1 Qb6+ 66.Kh1 Qb1+ 67.Kg2 Qd3 68.Qh5+ Kg7 69.Qe5+ Kh7 70.Rf2
25/43+  00:19   100 188 833  5 153 481  +2,45  51.Ba5

Crystal-x64-mingw:
Found 511 tablebases
...
26/22  00:06   38 903 345  5 976 854   0,00  51.Bf2 Qd6 52.Bxd4 Re7 53.Be5 Qxe5 54.Qxe5 Rxe5 55.Rxe5 Rc3 56.Kg2 Rd3 57.d6 Rxd6 58.Rb5 gxh5 59.Rxh5 Kg6 60.Rf5 Rd3 61.Rxf4
27/36+  00:14   78 452 825  5 331 486  +0,10  51.Ba5
27/36+  00:14   79 741 517  5 348 190  +0,21  51.Ba5
27/36+  00:17   99 179 126  5 552 520  +2,41  51.Ba5
Up Topic The Rybka Lounge / Test Positions / Ending win: Stockfish calls itself lost, Lc0 misses it

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