8 positions where Stockfish could do better

[Vinvin]

From my old test set from 2008 :

1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - - 0 1
3rrk2/2p1n1bQ/1p3pp1/1q2B1N1/p1b1PP2/6PB/P1P5/3R1RK1 w - - 0 1
5rk1/2p2Rpq/p2p2n1/2pPpQPp/4P2P/3P2N1/PP6/6K1 w - - 0 1
8/4K2p/6pr/5pk1/1pB2R2/p4PP1/8/8 w - - 0 1
8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - 0 1
8/8/8/2pK3p/8/5N2/1P4pq/5Rbk w - - 0 1
8/p7/qkpN1p2/8/1B1P4/PP3K2/5P2/8 w - - 0 1
k7/p1pR4/1p3p2/2P2rpB/PbP4p/2N1p2p/KP6/8 w - - 0 1

[pgn]
[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "King's attack"]
[Result "1-0"]
[FEN "k7/p1pR4/1p3p2/2P2rpB/PbP4p/2N1p2p/KP6/8 w - - 0 1"]

1. Bf3+ Rxf3 2. c6 a6 3. Nd5 Bd6 (3. .. e2 4. Rd8+ Ka7 5. Nxc7) 4. a5 bxa5
5. c5 Bxc5 (5. .. Bg3 6. Rd8+ Ka7 7. Ne7 e2 8. Nc8+ Kb8 9. Nb6+ Ka7 10.
Ra8#) 6. Nxc7+ Kb8 7. Nxa6+ Kc8 8. Rg7 Bf8 9. Rg8 Kd8 10. c7+ Ke7 11. c8=Q
1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Endgame"]
[Result "0-1"]
[BlackElo "2000"]
[FEN "8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - 0 1"]

1. ... {Alexander Kotov vs Mikhail Botvinik} g5 {or 1.d4 transposes} 2. fxg5 d4+ 3. exd4 Kg3 4.
g6 Kxh4 5. Be7+ Kg4 6. g7 h4 7. Bf6 Kg3 8. Kd3 h3 9. Be5+ Kg2 10. d5 Bxd5
11. Kd4 Bg8 12. Kd3 h2 13. Bxh2 Kxh2 0-1


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Deep combination"]
[Result "1-0"]
[FEN "8/4K2p/6pr/5pk1/1pB2R2/p4PP1/8/8 w - - 0 1"]

1. Rg4+ $3 fxg4 2. f4+ Kh5 3. Kf8 g5 4. Bf7+ Rg6 5. f5 Kh6 6. fxg6 hxg6 7.
Kg8 b3 8. Bxb3 a2 9. Bxa2 Kh5 10. Bb1 Kh6 11. Kf7 Kh7 12. Bxg6+ 1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Deep combination/zugzwang"]
[Result "1-0"]
[FEN "8/8/8/2pK3p/8/5N2/1P4pq/5Rbk w - - 0 1"]

1. Rb1 c4 2. Kc6 c3 3. bxc3 h4 4. Kb7 h3 5. Ka8 Qb8+ 6. Rxb8 1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Zugzwang"]
[Result "1-0"]
[FEN "8/p7/qkpN1p2/8/1B1P4/PP3K2/5P2/8 w - - 0 1"]

1. Ba5+ {Stockfish 1.5.1 JA: 1)} Kxa5 {Stockfish 1.5.1 JA: 2)} (1. .. Qxa5
2. Nc4+ Kb5 3. Nxa5 Kxa5 4. Ke4 Kb6 5. Kf5 Kc7 6. Kxf6 Kd6 7. f4 a5 8. f5
Kd5 9. Kg7 Kxd4 10. f6 Kc3 11. f7 Kxb3 12. f8=Q Kc4 13. Kf6 Kb5 14. Ke5 Kc4
15. Qb8 Kc3 16. Qb6 Kc4 17. Qxc6+ {+13.29/25 13.29/25}) 2. Nc4+ Kb5 3. Kf4
f5 4. Kg5 f4 5. f3 Qb7 6. Nd6+ Kb6 7. Nxb7 Kxb7 8. Kxf4 Kc8 9. Ke5 Kd7 10.
Kf6 Ke8 11. Ke6 Kf8 12. Kd6 Kf7 13. Kxc6 Ke6 14. d5+ Kf5 15. d6 Ke6 16. b4
Kf6 17. f4 {+5.89/26 5.89/26} 1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Mate"]
[Result "1-0"]
[FEN "3rrk2/2p1n1bQ/1p3pp1/1q2B1N1/p1b1PP2/6PB/P1P5/3R1RK1 w - - 0 1"]

{Shortest mate} 1. Be6 $1 1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Mate"]
[Result "1-0"]
[FEN "1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - - 0 1"]

{Mate in 9} 1. h7 $1 1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Pin/crippled position/zugzwang"]
[Result "1-0"]
[WhiteElo "2000"]
[FEN "5rk1/2p2Rpq/p2p2n1/2pPpQPp/4P2P/3P2N1/PP6/6K1 w - - 0 1"]

1. Qe6 {Stockfish 1.5.1 JA: 1)} Kh8 {Stockfish 1.5.1 JA: 2)} (1. .. Rxf7 2.
Nf5 a5 3. b3 Kh8 4. Qxf7 Qg8 5. Qxg6 Qh7 6. Qe8+ Qg8 7. Qxh5+ Qh7 8. Qf7
Qg8 9. Qxc7 Qf8 10. Ne7 Qa8 11. Qxd6 Qe8 12. Qxe5 Qb5 13. Nf5 {+11.19/19
11.19/19}) 2. Nf5 Rg8 3. Rxc7 Nf4 4. Nxd6 Qg6 5. Nf7+ Kh7 6. Qd7 Qb6 7. Nh6
c4+ 8. Kf1 Qxb2 9. Qf5+ Ng6 10. Nxg8 Qb1+ 11. Ke2 Qc2+ 12. Kf3 Qxd3+ 13.
Kf2 Qd2+ 14. Kf3 Qxa2 {+7.83/18} 1-0
[/pgn]

[kgburcham]

I tried the first one and quit

[d] 1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - - 0 1

Engine: Stockfish 280415 64 BMI2 (8192 MB)
by Tord Romstad, Marco Costalba and Joona

14/25 0:00 +12.47 1.Bxg6 axb4 2.h7 bxa3 3.Qg8 a2+ 4.Kxa2 Qc7 5.h8Q Qa5+ 6.Kb2 Qb4+ 7.Qb3 Qxb3+ 8.Kxb3 Kb7 9.Qd8 Kc6 10.Be8+ Kc5 11.Qc7+ Kd5 12.Bxb5 (657.010) 11135
15/28 0:00 +13.18 1.Bxg6 axb4 2.h7 Qf8 3.Qf7+ Qxf7 4.Bxf7 bxa3 5.h8Q a2+ 6.Kxa2 Kb6 7.Qb8+ Kc6 8.Be8+ Kc5 9.Qxb5+ Kd4 10.Qb4+ Kd5 11.Qc3 Ke4 12.Qd3+ Kf4 13.Qxd6 (1.232.524) 12838
16/28 0:00 +13.34 1.Bxg6 axb4 2.h7 Qf8 3.Qf7+ Qxf7 4.Bxf7 bxa3 5.h8Q a2+ 6.Kxa2 Kb6 7.Qb8+ Kc6 8.Be8+ Kc5 9.Qxb5+ Kd4 10.Qb4+ Kd5 11.Qb3+ Kc5 12.Qc3+ Kd5 (1.651.507) 13003
17/32 0:00 +15.86 1.Bxg6 a4 2.Bd3 Qf8 3.h7 Kb6 4.Bxb5 Qd8 5.Qc6+ Ka7 6.Qd7+ Qxd7 7.Bxd7 e4 8.h8Q e3 9.Qd4+ Kb7 10.Qxe3 Kc7 11.Bxa4 (4.648.201) 16482
18/32 0:00 +22.31 1.Bxg6 Kb6 2.h7 Qf8 3.Qg8 Qf1+ 4.Kb2 Qf6 5.bxa5+ Kc5 6.h8Q Qxh8 7.Qxh8 b4 8.Qc8+ Kd5 9.axb4 e4 10.Qb7+ Ke5 11.Qxe4+ Kf6 12.a6 (6.935.549) 16513
19/32 0:00 +49.80 1.Bxg6 axb4 2.h7 bxa3 3.Qg8 a2+ 4.Kxa2 Qb7 5.h8Q Qc7 6.Qb3 Qc4 7.Qxc4 bxc4 8.Qd8 Ka6 9.Qxd6+ Kb7 10.Be4+ Ka7 11.Qc5+ Kb8 (9.935.672) 16926
20/34 0:00 +53.12 1.Bxg6 e4 2.h7 axb4 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 bxa3 6.Bxe4 d5 7.Qa8+ Kb6 8.Qxd5 a2+ 9.Ka1 Kc7 10.Qxb5 Kd6 11.Kxa2 Ke6 (13.426.530) 17257
21/34 0:00 +53.15 1.Bxg6 e4 2.h7 axb4 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 bxa3 6.Bxe4 d5 7.Qa8+ Kb6 8.Qxd5 Ka5 9.Qd6 Ka4 10.Qd4+ Ka5 11.Qc3+ Ka4 12.Qb3+ Ka5 13.Qxa3+ Kb6 14.Qe3+ (13.506.350) 17205
22/38 0:01 +M24 1.Bxg6 e4 2.h7 e3 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 axb4 6.axb4 e2 7.Qa8+ Kb6 8.Qd8+ Ka7 9.Qd7+ Kb8 10.Qxd6+ Kc8 11.Qe6+ Kc7 12.Qe7+ Kb6 13.Qxe2 Ka6 14.Qe6+ (18.128.306) 16157
23/38 0:01 +M21 1.Bxg6 e4 2.h7 e3 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 axb4 6.axb4 e2 7.Qa8+ Kb6 8.Qd8+ Ka7 9.Qe7+ Kb6 10.Qxd6+ Kb7 11.Qe7+ Kb6 12.Qxe2 Ka6 13.Qe6+ Ka7 14.Qd7+ (18.380.016) 16108
24/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.248.330) 16211
25/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.375.767) 16196
26/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.625.423) 16176

[zullil]

From my old test set from 2008 :

k7/p1pR4/1p3p2/2P2rpB/PbP4p/2N1p2p/KP6/8 w - - 0 1
8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - 0 1
8/4K2p/6pr/5pk1/1pB2R2/p4PP1/8/8 w - - 0 1
8/8/8/2pK3p/8/5N2/1P4pq/5Rbk w - - 0 1
8/p7/qkpN1p2/8/1B1P4/PP3K2/5P2/8 w - - 0 1
3rrk2/2p1n1bQ/1p3pp1/1q2B1N1/p1b1PP2/6PB/P1P5/3R1RK1 w - - 0 1
1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - - 0 1
5rk1/2p2Rpq/p2p2n1/2pPpQPp/4P2P/3P2N1/PP6/6K1 w - - 0 1

[pgn]
[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "King's attack"]
[Result "1-0"]
[FEN "k7/p1pR4/1p3p2/2P2rpB/PbP4p/2N1p2p/KP6/8 w - - 0 1"]

1. Bf3+ Rxf3 2. c6 a6 3. Nd5 Bd6 (3. .. e2 4. Rd8+ Ka7 5. Nxc7) 4. a5 bxa5
5. c5 Bxc5 (5. .. Bg3 6. Rd8+ Ka7 7. Ne7 e2 8. Nc8+ Kb8 9. Nb6+ Ka7 10.
Ra8#) 6. Nxc7+ Kb8 7. Nxa6+ Kc8 8. Rg7 Bf8 9. Rg8 Kd8 10. c7+ Ke7 11. c8=Q
1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Endgame"]
[Result "0-1"]
[BlackElo "2000"]
[FEN "8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - 0 1"]

1. ... {Alexander Kotov vs Mikhail Botvinik} g5 {or 1.d4 transposes} 2. fxg5 d4+ 3. exd4 Kg3 4.
g6 Kxh4 5. Be7+ Kg4 6. g7 h4 7. Bf6 Kg3 8. Kd3 h3 9. Be5+ Kg2 10. d5 Bxd5
11. Kd4 Bg8 12. Kd3 h2 13. Bxh2 Kxh2 0-1


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Deep combination"]
[Result "1-0"]
[FEN "8/4K2p/6pr/5pk1/1pB2R2/p4PP1/8/8 w - - 0 1"]

1. Rg4+ $3 fxg4 2. f4+ Kh5 3. Kf8 g5 4. Bf7+ Rg6 5. f5 Kh6 6. fxg6 hxg6 7.
Kg8 b3 8. Bxb3 a2 9. Bxa2 Kh5 10. Bb1 Kh6 11. Kf7 Kh7 12. Bxg6+ 1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Deep combination/zugzwang"]
[Result "1-0"]
[FEN "8/8/8/2pK3p/8/5N2/1P4pq/5Rbk w - - 0 1"]

1. Rb1 c4 2. Kc6 c3 3. bxc3 h4 4. Kb7 h3 5. Ka8 Qb8+ 6. Rxb8 1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Zugzwang"]
[Result "1-0"]
[FEN "8/p7/qkpN1p2/8/1B1P4/PP3K2/5P2/8 w - - 0 1"]

1. Ba5+ {Stockfish 1.5.1 JA: 1)} Kxa5 {Stockfish 1.5.1 JA: 2)} (1. .. Qxa5
2. Nc4+ Kb5 3. Nxa5 Kxa5 4. Ke4 Kb6 5. Kf5 Kc7 6. Kxf6 Kd6 7. f4 a5 8. f5
Kd5 9. Kg7 Kxd4 10. f6 Kc3 11. f7 Kxb3 12. f8=Q Kc4 13. Kf6 Kb5 14. Ke5 Kc4
15. Qb8 Kc3 16. Qb6 Kc4 17. Qxc6+ {+13.29/25 13.29/25}) 2. Nc4+ Kb5 3. Kf4
f5 4. Kg5 f4 5. f3 Qb7 6. Nd6+ Kb6 7. Nxb7 Kxb7 8. Kxf4 Kc8 9. Ke5 Kd7 10.
Kf6 Ke8 11. Ke6 Kf8 12. Kd6 Kf7 13. Kxc6 Ke6 14. d5+ Kf5 15. d6 Ke6 16. b4
Kf6 17. f4 {+5.89/26 5.89/26} 1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Mate"]
[Result "1-0"]
[FEN "3rrk2/2p1n1bQ/1p3pp1/1q2B1N1/p1b1PP2/6PB/P1P5/3R1RK1 w - - 0 1"]

{Shortest mate} 1. Be6 $1 1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Mate"]
[Result "1-0"]
[FEN "1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - - 0 1"]

{Mate in 9} 1. h7 $1 1-0


[Event "hard CCC 2008"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Pos"]
[Black "Pin/crippled position/zugzwang"]
[Result "1-0"]
[WhiteElo "2000"]
[FEN "5rk1/2p2Rpq/p2p2n1/2pPpQPp/4P2P/3P2N1/PP6/6K1 w - - 0 1"]

1. Qe6 {Stockfish 1.5.1 JA: 1)} Kh8 {Stockfish 1.5.1 JA: 2)} (1. .. Rxf7 2.
Nf5 a5 3. b3 Kh8 4. Qxf7 Qg8 5. Qxg6 Qh7 6. Qe8+ Qg8 7. Qxh5+ Qh7 8. Qf7
Qg8 9. Qxc7 Qf8 10. Ne7 Qa8 11. Qxd6 Qe8 12. Qxe5 Qb5 13. Nf5 {+11.19/19
11.19/19}) 2. Nf5 Rg8 3. Rxc7 Nf4 4. Nxd6 Qg6 5. Nf7+ Kh7 6. Qd7 Qb6 7. Nh6
c4+ 8. Kf1 Qxb2 9. Qf5+ Ng6 10. Nxg8 Qb1+ 11. Ke2 Qc2+ 12. Kf3 Qxd3+ 13.
Kf2 Qd2+ 14. Kf3 Qxa2 {+7.83/18} 1-0
[/pgn]

Edited so that the positions are listed in the same order as they appear in the PGN dropdown.

[Vinvin]

No chance to find the mate in 9 with 1. h7! ?

I tried the first one and quit

1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - - 0 1

Engine: Stockfish 280415 64 BMI2 (8192 MB)
by Tord Romstad, Marco Costalba and Joona

14/25 0:00 +12.47 1.Bxg6 axb4 2.h7 bxa3 3.Qg8 a2+ 4.Kxa2 Qc7 5.h8Q Qa5+ 6.Kb2 Qb4+ 7.Qb3 Qxb3+ 8.Kxb3 Kb7 9.Qd8 Kc6 10.Be8+ Kc5 11.Qc7+ Kd5 12.Bxb5 (657.010) 11135
15/28 0:00 +13.18 1.Bxg6 axb4 2.h7 Qf8 3.Qf7+ Qxf7 4.Bxf7 bxa3 5.h8Q a2+ 6.Kxa2 Kb6 7.Qb8+ Kc6 8.Be8+ Kc5 9.Qxb5+ Kd4 10.Qb4+ Kd5 11.Qc3 Ke4 12.Qd3+ Kf4 13.Qxd6 (1.232.524) 12838
16/28 0:00 +13.34 1.Bxg6 axb4 2.h7 Qf8 3.Qf7+ Qxf7 4.Bxf7 bxa3 5.h8Q a2+ 6.Kxa2 Kb6 7.Qb8+ Kc6 8.Be8+ Kc5 9.Qxb5+ Kd4 10.Qb4+ Kd5 11.Qb3+ Kc5 12.Qc3+ Kd5 (1.651.507) 13003
17/32 0:00 +15.86 1.Bxg6 a4 2.Bd3 Qf8 3.h7 Kb6 4.Bxb5 Qd8 5.Qc6+ Ka7 6.Qd7+ Qxd7 7.Bxd7 e4 8.h8Q e3 9.Qd4+ Kb7 10.Qxe3 Kc7 11.Bxa4 (4.648.201) 16482
18/32 0:00 +22.31 1.Bxg6 Kb6 2.h7 Qf8 3.Qg8 Qf1+ 4.Kb2 Qf6 5.bxa5+ Kc5 6.h8Q Qxh8 7.Qxh8 b4 8.Qc8+ Kd5 9.axb4 e4 10.Qb7+ Ke5 11.Qxe4+ Kf6 12.a6 (6.935.549) 16513
19/32 0:00 +49.80 1.Bxg6 axb4 2.h7 bxa3 3.Qg8 a2+ 4.Kxa2 Qb7 5.h8Q Qc7 6.Qb3 Qc4 7.Qxc4 bxc4 8.Qd8 Ka6 9.Qxd6+ Kb7 10.Be4+ Ka7 11.Qc5+ Kb8 (9.935.672) 16926
20/34 0:00 +53.12 1.Bxg6 e4 2.h7 axb4 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 bxa3 6.Bxe4 d5 7.Qa8+ Kb6 8.Qxd5 a2+ 9.Ka1 Kc7 10.Qxb5 Kd6 11.Kxa2 Ke6 (13.426.530) 17257
21/34 0:00 +53.15 1.Bxg6 e4 2.h7 axb4 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 bxa3 6.Bxe4 d5 7.Qa8+ Kb6 8.Qxd5 Ka5 9.Qd6 Ka4 10.Qd4+ Ka5 11.Qc3+ Ka4 12.Qb3+ Ka5 13.Qxa3+ Kb6 14.Qe3+ (13.506.350) 17205
22/38 0:01 +M24 1.Bxg6 e4 2.h7 e3 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 axb4 6.axb4 e2 7.Qa8+ Kb6 8.Qd8+ Ka7 9.Qd7+ Kb8 10.Qxd6+ Kc8 11.Qe6+ Kc7 12.Qe7+ Kb6 13.Qxe2 Ka6 14.Qe6+ (18.128.306) 16157
23/38 0:01 +M21 1.Bxg6 e4 2.h7 e3 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 axb4 6.axb4 e2 7.Qa8+ Kb6 8.Qd8+ Ka7 9.Qe7+ Kb6 10.Qxd6+ Kb7 11.Qe7+ Kb6 12.Qxe2 Ka6 13.Qe6+ Ka7 14.Qd7+ (18.380.016) 16108
24/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.248.330) 16211
25/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.375.767) 16196
26/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.625.423) 16176

[zullil]

I tried the first one and quit

[d] 1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - - 0 1

Engine: Stockfish 280415 64 BMI2 (8192 MB)
by Tord Romstad, Marco Costalba and Joona

14/25 0:00 +12.47 1.Bxg6 axb4 2.h7 bxa3 3.Qg8 a2+ 4.Kxa2 Qc7 5.h8Q Qa5+ 6.Kb2 Qb4+ 7.Qb3 Qxb3+ 8.Kxb3 Kb7 9.Qd8 Kc6 10.Be8+ Kc5 11.Qc7+ Kd5 12.Bxb5 (657.010) 11135
15/28 0:00 +13.18 1.Bxg6 axb4 2.h7 Qf8 3.Qf7+ Qxf7 4.Bxf7 bxa3 5.h8Q a2+ 6.Kxa2 Kb6 7.Qb8+ Kc6 8.Be8+ Kc5 9.Qxb5+ Kd4 10.Qb4+ Kd5 11.Qc3 Ke4 12.Qd3+ Kf4 13.Qxd6 (1.232.524) 12838
16/28 0:00 +13.34 1.Bxg6 axb4 2.h7 Qf8 3.Qf7+ Qxf7 4.Bxf7 bxa3 5.h8Q a2+ 6.Kxa2 Kb6 7.Qb8+ Kc6 8.Be8+ Kc5 9.Qxb5+ Kd4 10.Qb4+ Kd5 11.Qb3+ Kc5 12.Qc3+ Kd5 (1.651.507) 13003
17/32 0:00 +15.86 1.Bxg6 a4 2.Bd3 Qf8 3.h7 Kb6 4.Bxb5 Qd8 5.Qc6+ Ka7 6.Qd7+ Qxd7 7.Bxd7 e4 8.h8Q e3 9.Qd4+ Kb7 10.Qxe3 Kc7 11.Bxa4 (4.648.201) 16482
18/32 0:00 +22.31 1.Bxg6 Kb6 2.h7 Qf8 3.Qg8 Qf1+ 4.Kb2 Qf6 5.bxa5+ Kc5 6.h8Q Qxh8 7.Qxh8 b4 8.Qc8+ Kd5 9.axb4 e4 10.Qb7+ Ke5 11.Qxe4+ Kf6 12.a6 (6.935.549) 16513
19/32 0:00 +49.80 1.Bxg6 axb4 2.h7 bxa3 3.Qg8 a2+ 4.Kxa2 Qb7 5.h8Q Qc7 6.Qb3 Qc4 7.Qxc4 bxc4 8.Qd8 Ka6 9.Qxd6+ Kb7 10.Be4+ Ka7 11.Qc5+ Kb8 (9.935.672) 16926
20/34 0:00 +53.12 1.Bxg6 e4 2.h7 axb4 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 bxa3 6.Bxe4 d5 7.Qa8+ Kb6 8.Qxd5 a2+ 9.Ka1 Kc7 10.Qxb5 Kd6 11.Kxa2 Ke6 (13.426.530) 17257
21/34 0:00 +53.15 1.Bxg6 e4 2.h7 axb4 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 bxa3 6.Bxe4 d5 7.Qa8+ Kb6 8.Qxd5 Ka5 9.Qd6 Ka4 10.Qd4+ Ka5 11.Qc3+ Ka4 12.Qb3+ Ka5 13.Qxa3+ Kb6 14.Qe3+ (13.506.350) 17205
22/38 0:01 +M24 1.Bxg6 e4 2.h7 e3 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 axb4 6.axb4 e2 7.Qa8+ Kb6 8.Qd8+ Ka7 9.Qd7+ Kb8 10.Qxd6+ Kc8 11.Qe6+ Kc7 12.Qe7+ Kb6 13.Qxe2 Ka6 14.Qe6+ (18.128.306) 16157
23/38 0:01 +M21 1.Bxg6 e4 2.h7 e3 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 axb4 6.axb4 e2 7.Qa8+ Kb6 8.Qd8+ Ka7 9.Qe7+ Kb6 10.Qxd6+ Kb7 11.Qe7+ Kb6 12.Qxe2 Ka6 13.Qe6+ Ka7 14.Qd7+ (18.380.016) 16108
24/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.248.330) 16211
25/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.375.767) 16196
26/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.625.423) 16176

Very strange. I'm using a slightly newer version of SF, but it never finds Bxg6 so early. It always starts with Qf7+. Are you sure you started this search with a clear hash?

In any case, here's what I get:

Code: Select all

info depth 50 seldepth 38 multipv 1 score mate 9 nodes 735804710 nps 31321501 hashfull 146 tbhits 0 time 23492 pv h6h7 g6h8 d5c6 a5b4 a3b4 d6d5 e4d5 h8f7 h7h8q f7h8 c2c4 e5e4 c4b5 b8c8 b5b6 a7a6 d5c4

[zullil]

From my old test set from 2008 :

[d]3rrk2/2p1n1bQ/1p3pp1/1q2B1N1/p1b1PP2/6PB/P1P5/3R1RK1 w - - 0 1

This one challenges Stockfish. Mate in 15?

Code: Select all

info depth 35 currmove h3e6 currmovenumber 17
info depth 35 seldepth 64 multipv 1 score cp 1303 lowerbound nodes 1546759796 nps 24030696 hashfull 594 tbhits 0 time 64366 pv h3e6
info depth 35 currmove h3e6 currmovenumber 1
info depth 35 seldepth 64 multipv 1 score cp 1461 lowerbound nodes 1662369963 nps 24239158 hashfull 633 tbhits 0 time 68582 pv h3e6
info depth 35 currmove h3e6 currmovenumber 1
info depth 35 seldepth 64 multipv 1 score cp 1697 lowerbound nodes 1814098351 nps 24500605 hashfull 674 tbhits 0 time 74043 pv h3e6
info depth 35 currmove h3e6 currmovenumber 1
info depth 35 seldepth 64 multipv 1 score cp 2051 lowerbound nodes 2032877621 nps 24817218 hashfull 722 tbhits 0 time 81914 pv h3e6
info depth 35 currmove h3e6 currmovenumber 1
info depth 35 seldepth 64 multipv 1 score cp 2581 lowerbound nodes 2214243027 nps 25075229 hashfull 759 tbhits 0 time 88304 pv h3e6
info depth 35 currmove h3e6 currmovenumber 1
info depth 35 seldepth 64 multipv 1 score cp 3377 lowerbound nodes 2342386712 nps 25238516 hashfull 779 tbhits 0 time 92810 pv h3e6
info depth 35 currmove h3e6 currmovenumber 1
info depth 35 seldepth 64 multipv 1 score cp 4570 lowerbound nodes 2388433876 nps 25292632 hashfull 786 tbhits 0 time 94432 pv h3e6
info depth 35 currmove h3e6 currmovenumber 1
info depth 35 seldepth 64 multipv 1 score cp 6360 lowerbound nodes 2410157952 nps 25311467 hashfull 791 tbhits 0 time 95220 pv h3e6
info depth 35 currmove h3e6 currmovenumber 1
info depth 35 seldepth 64 multipv 1 score cp 9045 lowerbound nodes 2424196047 nps 25318238 hashfull 794 tbhits 0 time 95749 pv h3e6
info depth 35 currmove h3e6 currmovenumber 1
info depth 35 currmove e5c7 currmovenumber 3
info depth 35 currmove h3f5 currmovenumber 11
info depth 35 currmove h7h6 currmovenumber 12
info depth 35 currmove h7h8 currmovenumber 13
info depth 35 currmove g1f2 currmovenumber 18
info depth 35 currmove h7h4 currmovenumber 19
info depth 35 currmove d1d5 currmovenumber 24
info depth 35 seldepth 64 multipv 1 score mate 16 nodes 3239275200 nps 26204759 hashfull 901 tbhits 0 time 123614 pv h3e6 b5c5 g1h1 d8d1 f1d1 e8c8 e6c8 e7c8 d1d8 f8e7 d8c8 e7d7 c8c7 c5c7 h7g7 d7e8 g7c7 f6e5 c7c4 e8d7 f4e5 b6b5 c4b5 d7d8 e5e6 d8c7 e6e7 c7d6 e7e8q d6c7 e8d7
info depth 36 currmove h3e6 currmovenumber 1
info depth 36 currmove e5d6 currmovenumber 5
info depth 36 currmove d1a1 currmovenumber 9
info depth 36 currmove h3g4 currmovenumber 12
info depth 36 currmove h3f5 currmovenumber 15
info depth 36 currmove g1f2 currmovenumber 30
info depth 36 currmove d1c1 currmovenumber 31
info depth 36 currmove g1h2 currmovenumber 32
info depth 36 currmove h7h4 currmovenumber 36
info depth 36 currmove h7h5 currmovenumber 37
info depth 36 currmove g3g4 currmovenumber 40
info depth 36 currmove d1d5 currmovenumber 41
info depth 36 currmove f1f3 currmovenumber 42
info depth 36 currmove h7g7 currmovenumber 43
info depth 36 seldepth 64 multipv 1 score mate 16 nodes 3482420007 nps 26361200 hashfull 921 tbhits 0 time 132104 pv h3e6 b5c5 g1h1 d8d1 f1d1 e8c8 e6c8 e7c8 d1d8 f8e7 d8c8 e7d7 c8c7 c5c7 h7g7 d7e8 g7c7 f6e5 c7c4 e8d7 f4e5 b6b5 c4b5 d7d8 e5e6 d8c7 e6e7 c7d6 e7e8q d6c7 e8d7
info depth 37 currmove h3e6 currmovenumber 1
info depth 37 currmove e5c7 currmovenumber 3
info depth 37 currmove h3d7 currmovenumber 8
info depth 37 currmove h3c8 currmovenumber 11
info depth 37 currmove e5c3 currmovenumber 13
info depth 37 currmove g5f7 currmovenumber 14
info depth 37 currmove d1d5 currmovenumber 15
info depth 37 seldepth 64 multipv 1 score mate 15 nodes 3721090449 nps 26520304 hashfull 931 tbhits 0 time 140311 pv h3e6 b5c5 g1h1 d8d1 f1d1 e8c8 e6c8 e7c8 d1d8 f8e7 d8c8 e7d7 c8c7 c5c7 h7g7 d7e8 g7c7 f6e5 c7c4 e8d7 c4d5 d7c7 g5e6 c7b8 d5c6 b8a7 e6d8 e5f4 c6b7

[kgburcham]

[d] 1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - -


Engine: Stockfish 280415 64 BMI2 (8192 MB)
by Tord Romstad, Marco Costalba and Joona
1/01 0:00 +5.68 1.Bxg6 (46) 15
2/02 0:00 +5.99 1.Bxg6 axb4 (97) 32
3/03 0:00 +5.99 1.Bxg6 axb4 2.axb4 (183) 61
4/04 0:00 +6.11 1.Bxg6 axb4 2.axb4 Ka6 (332) 110
5/08 0:00 +5.58 1.Qf7+ Ka6 2.Qxg6 axb4 3.axb4 Kb6 (2.063) 515
6/08 0:00 +5.71 1.Bxg6 axb4 2.axb4 Kb6 3.h7 Qf8 (3.821) 955
7/08 0:00 +5.67 1.Bxg6 axb4 2.axb4 Kb6 3.h7 Qd8 4.Bf7 (4.943) 988
8/10 0:00 +6.67 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Qe8 4.Qxd6+ Qc6 5.Qb8+ Ka6 6.Qxe5 (8.917) 1783
9/11 0:00 +6.64 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Kc7 4.h7 Qe8 5.Bxb5 (10.273) 1712
10/14 0:00 +7.79 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Kc7 4.Bxb5 Qf8 5.Qc6+ Kb8 6.h7 d5 7.Qxd5 (43.258) 4325
11/18 0:00 +9.27 1.Bxg6 Kb6 2.Bd3 Kc7 3.bxa5 Qf8 4.h7 Qh8 5.Qf7+ Kc6 6.Be4+ d5 7.Qxd5+ Kc7 8.Qc6+ Kb8 (142.751) 7513
12/22 0:00 +9.38 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Kc7 4.Bxb5 Qd8 5.h7 Kb6 6.Qg8 Qxg8 7.hxg8Q Kxb5 (155.521) 7405
13/22 0:00 +10.74 1.Bxg6 Qd8 2.Qxb5 axb4 3.Be4 d5 4.Bxd5 Qb6 5.Qxb6+ Kxb6 6.h7 Kc5 7.h8Q Kxd5 8.Qd8+ Kc5 (292.756) 8871
14/22 0:00 +12.61 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Qd8 4.Qxb5+ Ka7 5.Be4 Qb6 6.Qxb6+ Kxb6 7.h7 Kb5 8.h8Q Kxb4 9.Qc8 (605.377) 10437
15/32 0:00 +13.43 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Kc7 4.Bxb5 Qd8 5.h7 Qf8 6.Qc6+ Kb8 7.Qe8+ Qxe8 8.Bxe8 Kb7 9.h8Q Kc7 10.Qf6 (1.997.172) 13053
16/32 0:00 +12.39 1.Bxg6 Kb6 2.Bd3 Kc7 3.bxa5 Qe8 4.h7 Qh5 5.Qa8 e4 6.Bxe4 d5 7.h8Q Qxh8 8.Qxh8 dxe4 9.Qe5+ Kc6 10.Qxe4+ Kc5 (2.378.491) 13068
17/32 0:00 +14.34 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Kc7 4.Bxb5 Qd8 5.h7 Qf8 6.Qc6+ Kb8 7.Qe8+ Qxe8 8.Bxe8 Kb7 9.h8Q Kc7 10.Qf6 (2.585.317) 13123
18/32 0:00 +15.14 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Kc7 4.Bxb5 Qd8 5.h7 Qf8 6.Qc6+ Kb8 7.Qe8+ Qxe8 8.Bxe8 Kc7 9.h8Q e4 10.Qd4 e3 11.Qxe3 (3.562.177) 9894
19/32 0:00 +16.94 1.Bxg6 Kb6 2.Bd3 Kc7 3.bxa5 Qf8 4.h7 e4 5.Bxe4 Qf1+ 6.Ka2 Qf6 7.Qb7+ Kd8 8.Qa8+ Ke7 9.h8Q Qxh8 10.Qxh8 Ke6 11.a6 Kd7 12.a7 (5.305.078) 10525
20/34 0:00 +22.79 1.Bxg6 Kb6 2.Bd3 Kc7 3.bxa5 Qe8 4.h7 Qh5 5.Qa8 Qd1+ 6.Kb2 Qh5 7.h8Q Qxh8 8.Qxh8 Kc6 9.Qe8+ Kd5 10.Qxb5+ Ke6 11.a6 e4 12.Bxe4 Kf6 13.a7 d5 14.Qc6+ (7.091.761) 11063
21/38 0:00 +26.84 1.Bxg6 Kb6 2.Bd3 Kc7 3.bxa5 Qd8 4.h7 Qh4 5.Qf7+ Kc6 6.Qe8+ Kd5 7.Qxb5+ Ke6 8.Qe8+ Kd5 9.Qg8+ Kc6 10.Qc8+ Kd5 11.h8Q Qf4 12.Qb7+ Kd4 13.Qb4+ Ke3 14.Qxd6 (11.499.269) 12458
22/40 0:01 +M23 1.Bxg6 axb4 2.axb4 Qb7 3.Qxb7+ Kxb7 4.h7 Kc6 5.h8Q Kd5 6.Qa8+ Kd4 7.Qe4+ Kc3 8.Qc6+ Kd2 9.Qxd6+ Ke1 10.Qxe5+ Kd1 11.Qxb5 Ke1 12.Qg5 Kd1 13.Qc1+ Ke2 14.Bd3+ (15.657.790) 13544
23/40 0:01 +M23 1.Bxg6 axb4 2.axb4 Qb7 3.Qxb7+ Kxb7 4.h7 Kc6 5.h8Q Kd5 6.Qa8+ Kd4 7.Qe4+ Kc3 8.Qc6+ Kd2 9.Qxd6+ Ke1 10.Qxe5+ Kd1 11.Qxb5 Ke1 12.Qg5 Kd1 13.Qc1+ Ke2 14.Bd3+ (15.904.977) 13605
24/40 0:01 +M13 1.Bxg6 axb4 2.axb4 Qb7 3.Qxb7+ Kxb7 4.h7 Kc6 5.h8Q Kd5 6.Qa8+ Ke6 7.Qf8 Kd7 8.Qe8+ Kc7 9.Be4 d5 10.Bxd5 e4 11.Qe7+ Kc8 12.Bxe4 Kb8 13.Qb7+ (17.186.602) 13905
25/40 0:01 +M13 1.Bxg6 axb4 2.axb4 Qb7 3.Qxb7+ Kxb7 4.h7 Kc6 5.h8Q Kd5 6.Qa8+ Ke6 7.Qf8 Kd7 8.Qe8+ Kc7 9.Be4 d5 10.Bxd5 e4 11.Qe7+ Kc8 12.Bxe4 Kb8 13.Qb7+ (17.769.560) 13915
26/40 0:01 +M13 1.Bxg6 axb4 2.axb4 Qb7 3.Qxb7+ Kxb7 4.h7 Kc6 5.h8Q Kd5 6.Qa8+ Ke6 7.Qf8 Kd7 8.Qe8+ Kc7 9.Be4 d5 10.Bxd5 e4 11.Qe7+ Kc8 12.Bxe4 Kb8 13.Qb7+ (18.606.132) 13792
27/40 0:01 +M12 1.Bxg6 axb4 2.axb4 Qb7 3.Qxb7+ Kxb7 4.h7 Kc6 5.h8Q Kd5 6.c3 Ke6 7.Qf8 Kd7 8.Bf5+ Kc6 9.Qc8+ Kb6 10.Be4 d5 11.Bxd5 e4 12.Qb7+ (20.125.593) 13860
28/40 0:01 +M12 1.Bxg6 axb4 2.axb4 Qb7 3.Qxb7+ Kxb7 4.h7 Kc6 5.h8Q Kd5 6.c3 Ke6 7.Qf8 Kd7 8.Bf5+ Kc6 9.Qc8+ Kb6 10.Be4 d5 11.Bxd5 e4 12.Qb7+ (21.649.909) 14104
29/40 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (27.164.921) 15142
30/40 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (28.158.767) 15278
31/40 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (29.179.456) 15447
32/40 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (30.982.967) 15727
33/40 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (32.844.982) 16037
34/40 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (34.816.357) 16376
35/40 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (39.111.107) 16785
36/40 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (42.142.709) 16843
37/40 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (45.744.131) 17229
38/40 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (50.518.149) 17819
39/40 0:03 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (57.883.775) 18576
40/40 0:03 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (63.368.205) 18781
41/40 0:03 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (70.528.479) 19154
42/40 0:04 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (79.594.399) 19755
43/40 0:04 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (89.122.944) 20163
44/40 0:04 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (102.084.125) 20706
45/40 0:05 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (112.925.017) 21064
46/40 0:05 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (127.476.657) 21547
47/40 0:06 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (148.695.192) 22094
48/40 0:07 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (180.811.137) 22936
49/40 0:08 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (204.124.494) 23174
50/40 0:09 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (232.206.063) 23651
51/40 0:10 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (255.712.751) 23844
52/40 0:11 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (282.657.702) 24189
53/40 0:13 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 e4 5.h7 Kb6 6.h8Q Kc7 7.Qg7+ Kd8 8.Bc6 Kc8 9.Qd7+ Kb8 10.Qb7+ (317.882.728) 24452
54/40 0:30 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 e4 7.cxb5 Qc8 8.Qxc8 e3 9.Qb7+ (761.371.052) 25327
55/40 0:30 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 e4 7.cxb5 Qc8 8.Qxc8 e3 9.Qb7+ (781.343.847) 25332
56/40 0:31 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 e4 7.cxb5 Qc8 8.Qxc8 e3 9.Qb7+ (802.054.156) 25343
57/40 0:32 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 e4 7.cxb5 Qc8 8.Qxc8 e3 9.Qb7+ (823.082.457) 25338
58/40 0:33 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 e4 7.cxb5 Qc8 8.Qxc8 e3 9.Qb7+ (837.979.520) 25338
59/40 0:34 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 e4 7.cxb5 Qc8 8.Qxc8 e3 9.Qb7+ (865.966.633) 25367
60/40 0:35 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 e4 7.cxb5 Qc8 8.Qxc8 e3 9.Qb7+ (894.183.755) 25361
61/40 0:35 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 e4 7.cxb5 Qc8 8.Qxc8 e3 9.Qb7+ (912.684.424) 25369
62/40 0:37 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 e4 7.cxb5 Qc8 8.Qxc8 e3 9.Qb7+ (952.392.346) 25416
best move: h6-h7 time: 0:39.500 min n/s: 25.416.106 nodes: 960.266.497

[kgburcham]

I tried the first one and quit

[d] 1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - - 0 1

Engine: Stockfish 280415 64 BMI2 (8192 MB)
by Tord Romstad, Marco Costalba and Joona

14/25 0:00 +12.47 1.Bxg6 axb4 2.h7 bxa3 3.Qg8 a2+ 4.Kxa2 Qc7 5.h8Q Qa5+ 6.Kb2 Qb4+ 7.Qb3 Qxb3+ 8.Kxb3 Kb7 9.Qd8 Kc6 10.Be8+ Kc5 11.Qc7+ Kd5 12.Bxb5 (657.010) 11135
15/28 0:00 +13.18 1.Bxg6 axb4 2.h7 Qf8 3.Qf7+ Qxf7 4.Bxf7 bxa3 5.h8Q a2+ 6.Kxa2 Kb6 7.Qb8+ Kc6 8.Be8+ Kc5 9.Qxb5+ Kd4 10.Qb4+ Kd5 11.Qc3 Ke4 12.Qd3+ Kf4 13.Qxd6 (1.232.524) 12838
16/28 0:00 +13.34 1.Bxg6 axb4 2.h7 Qf8 3.Qf7+ Qxf7 4.Bxf7 bxa3 5.h8Q a2+ 6.Kxa2 Kb6 7.Qb8+ Kc6 8.Be8+ Kc5 9.Qxb5+ Kd4 10.Qb4+ Kd5 11.Qb3+ Kc5 12.Qc3+ Kd5 (1.651.507) 13003
17/32 0:00 +15.86 1.Bxg6 a4 2.Bd3 Qf8 3.h7 Kb6 4.Bxb5 Qd8 5.Qc6+ Ka7 6.Qd7+ Qxd7 7.Bxd7 e4 8.h8Q e3 9.Qd4+ Kb7 10.Qxe3 Kc7 11.Bxa4 (4.648.201) 16482
18/32 0:00 +22.31 1.Bxg6 Kb6 2.h7 Qf8 3.Qg8 Qf1+ 4.Kb2 Qf6 5.bxa5+ Kc5 6.h8Q Qxh8 7.Qxh8 b4 8.Qc8+ Kd5 9.axb4 e4 10.Qb7+ Ke5 11.Qxe4+ Kf6 12.a6 (6.935.549) 16513
19/32 0:00 +49.80 1.Bxg6 axb4 2.h7 bxa3 3.Qg8 a2+ 4.Kxa2 Qb7 5.h8Q Qc7 6.Qb3 Qc4 7.Qxc4 bxc4 8.Qd8 Ka6 9.Qxd6+ Kb7 10.Be4+ Ka7 11.Qc5+ Kb8 (9.935.672) 16926
20/34 0:00 +53.12 1.Bxg6 e4 2.h7 axb4 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 bxa3 6.Bxe4 d5 7.Qa8+ Kb6 8.Qxd5 a2+ 9.Ka1 Kc7 10.Qxb5 Kd6 11.Kxa2 Ke6 (13.426.530) 17257
21/34 0:00 +53.15 1.Bxg6 e4 2.h7 axb4 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 bxa3 6.Bxe4 d5 7.Qa8+ Kb6 8.Qxd5 Ka5 9.Qd6 Ka4 10.Qd4+ Ka5 11.Qc3+ Ka4 12.Qb3+ Ka5 13.Qxa3+ Kb6 14.Qe3+ (13.506.350) 17205
22/38 0:01 +M24 1.Bxg6 e4 2.h7 e3 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 axb4 6.axb4 e2 7.Qa8+ Kb6 8.Qd8+ Ka7 9.Qd7+ Kb8 10.Qxd6+ Kc8 11.Qe6+ Kc7 12.Qe7+ Kb6 13.Qxe2 Ka6 14.Qe6+ (18.128.306) 16157
23/38 0:01 +M21 1.Bxg6 e4 2.h7 e3 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 axb4 6.axb4 e2 7.Qa8+ Kb6 8.Qd8+ Ka7 9.Qe7+ Kb6 10.Qxd6+ Kb7 11.Qe7+ Kb6 12.Qxe2 Ka6 13.Qe6+ Ka7 14.Qd7+ (18.380.016) 16108
24/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.248.330) 16211
25/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.375.767) 16196
26/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.625.423) 16176

Very strange. I'm using a slightly newer version of SF, but it never finds Bxg6 so early. It always starts with Qf7+. Are you sure you started this search with a clear hash?

In any case, here's what I get:

Code: Select all

info depth 50 seldepth 38 multipv 1 score mate 9 nodes 735804710 nps 31321501 hashfull 146 tbhits 0 time 23492 pv h6h7 g6h8 d5c6 a5b4 a3b4 d6d5 e4d5 h8f7 h7h8q f7h8 c2c4 e5e4 c4b5 b8c8 b5b6 a7a6 d5c4

reboot pc, same result
[d] 1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - -

Engine: Stockfish 280415 64 BMI2 (8192 MB)
by Tord Romstad, Marco Costalba and Joona
1/01 0:00 +5.68 1.Bxg6 (46) 11
2/02 0:00 +5.99 1.Bxg6 axb4 (97) 24
3/03 0:00 +5.99 1.Bxg6 axb4 2.axb4 (183) 45
4/04 0:00 +6.11 1.Bxg6 axb4 2.axb4 Ka6 (332) 83
5/08 0:00 +5.58 1.Qf7+ Ka6 2.Qxg6 axb4 3.axb4 Kb6 (2.063) 412
6/08 0:00 +5.71 1.Bxg6 axb4 2.axb4 Kb6 3.h7 Qf8 (3.723) 620
7/08 0:00 +5.67 1.Bxg6 axb4 2.axb4 Kb6 3.h7 Qd8 4.Bf7 (4.823) 689
8/10 0:00 +6.67 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Qb7 4.Qxd6+ Qc6 5.Qb8+ Ka6 (8.949) 1118
9/11 0:00 +7.00 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Kc7 4.h7 Qc8 5.Bxb5 (12.991) 1443
10/15 0:00 +7.31 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Qd8 4.h7 Qf8 5.Bxb5 Kc7 6.Qc6+ Kb8 (34.443) 2460
11/16 0:00 +9.15 1.Bxg6 a4 2.Bd3 Ka6 3.Qxb5+ Qxb5 4.Bxb5+ Kxb5 5.h7 Kc4 6.h8Q e4 7.Qc8+ Kd4 (135.280) 5010
12/16 0:00 +9.15 1.Bxg6 a4 2.Bd3 Ka6 3.Qxb5+ Qxb5 4.Bxb5+ Kxb5 5.h7 Kc4 6.h8Q e4 7.Qc8+ Kd4 (141.756) 5062
13/24 0:00 +11.71 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Qf8 4.h7 Kc7 5.Bxb5 Qd8 6.Qg8 Qh4 7.h8Q Qxb4+ 8.Qb3 Qxb3+ 9.cxb3 (398.096) 7238
14/24 0:00 +13.25 1.Bxg6 a4 2.Bd3 Qb6 3.h7 Qg1+ 4.Ka2 Qg7 5.Qxb5 Qf8 6.Qa5+ Kb8 7.Qb6+ Kc8 8.Bf5+ Qxf5 9.h8Q+ Kd7 10.Qhd8+ Ke6 11.Qdxd6+ Kf7 12.Qbc7+ Ke8 (533.411) 7512
15/26 0:00 +13.57 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Kc7 4.h7 Qd8 5.Be4 Qf8 6.Qc6+ Kd8 7.Qa8+ Ke7 8.Qxf8+ Kxf8 9.h8Q+ Ke7 10.Qb8 Ke6 11.Qxb5 (829.132) 8375
16/26 0:00 +13.94 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qa7 4.axb4 Qd4 5.Qa8+ Kb6 6.Qa5+ Kc6 7.Be8+ Kb7 8.h8Q Qd1+ 9.Kb2 Qd4+ 10.Ka2 Qd5+ 11.Ka3 Qd4 (1.030.797) 8589
17/33 0:00 +14.49 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qa7 4.axb4 Qd4 5.Qa8+ Kb6 6.Qa5+ Kc6 7.Be8+ Kd5 8.Bf7+ Ke4 9.h8Q Qd1+ 10.Kb2 Qd4+ 11.Ka2 Ke3 12.Qh3+ Kd2 (1.434.529) 9137
18/33 0:00 +15.22 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qa7 4.axb4 Qd4 5.Qa8+ Kb6 6.Qa5+ Kc6 7.Be8+ Kd5 8.h8Q Qd1+ 9.Kb2 Qd4+ 10.Ka2 Qc4+ 11.Kb1 Qf1+ 12.Kb2 Ke4 13.Qh4+ Qf4 14.Qh7+ (2.653.928) 10615
19/42 0:00 +24.46 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qa7 4.axb4 Qd4 5.Qa8+ Kb6 6.Qa5+ Kc6 7.Be8+ Kd5 8.h8Q Qg1+ 9.Ka2 Ke4 10.Bc6+ d5 11.Qh7+ Kf4 12.Qf7+ Kg4 13.Qg6+ Kf4 14.Qxg1 (6.500.605) 12453
20/42 0:00 +49.87 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qxg8 4.hxg8Q bxa3 5.Qd5 Kb6 6.Qxd6+ Kb7 7.Qxe5 Kc6 8.Be4+ Kd7 9.Qxb5+ Ke6 10.Qb3+ Ke5 11.Qxa3 Kxe4 12.Qa8+ Kf4 13.Kb2 (8.661.273) 12320
21/42 0:00 +49.87 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qxg8 4.hxg8Q bxa3 5.Qd5 Kb6 6.Qxd6+ Kb7 7.Qxe5 Kc6 8.Be4+ Kd7 9.Qxb5+ Ke6 10.Qb3+ Ke5 11.Qxa3 Kxe4 12.Qa8+ Kf4 13.Kb2 Kg5 (8.718.454) 12296
22/42 0:00 +53.19 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qxg8 4.hxg8Q bxa3 5.Qd5 a2+ 6.Kxa2 Kb6 7.Qxd6+ Kb7 8.Qxe5 Kb6 9.Bd3 Kb7 10.Bxb5 Kb6 11.Qd5 Kc7 12.Qc6+ Kb8 (9.122.335) 12098
23/42 0:00 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (11.659.413) 12324
24/42 0:00 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (11.809.902) 12353
25/42 0:00 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (12.176.539) 12450
26/42 0:00 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (12.437.669) 12525
27/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (12.799.111) 12634
28/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (13.313.476) 12776
29/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (13.891.528) 12982
30/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (14.853.939) 13286
31/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (15.974.129) 13664
32/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (16.995.661) 14011
33/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (18.593.680) 14514
34/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (20.138.227) 14994
35/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (22.349.136) 15650
36/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (26.949.451) 16195
37/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (29.410.594) 16293
38/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (32.514.284) 16734
39/42 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (39.990.292) 17876
40/42 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (44.776.975) 18541
41/42 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (51.024.570) 18904
42/42 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (57.170.111) 19184
43/42 0:03 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (64.461.127) 19883
44/42 0:03 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (75.785.705) 20361
45/42 0:04 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (84.426.421) 20702
46/42 0:04 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (96.665.573) 21395
47/42 0:05 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (112.259.258) 21738
48/42 0:05 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (124.977.491) 22166
49/42 0:17 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (411.196.484) 24169
50/42 0:17 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (423.679.535) 24181
51/42 0:17 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (435.310.833) 24186
52/42 0:18 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (449.935.584) 24205
53/42 0:19 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (463.933.294) 24233
54/42 0:19 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (478.548.867) 24262
55/42 0:20 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (498.234.054) 24334
56/42 0:21 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (513.964.998) 24356
57/42 0:21 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (536.091.390) 24384
58/42 0:22 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (560.766.358) 24439
59/42 0:23 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (582.243.677) 24484
60/42 0:24 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (606.340.683) 24539
61/42 0:25 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (638.888.015) 24617
best move: h6-h7 time: 0:28.406 min n/s: 24.617.116 nodes: 657.691.924

[kgburcham]

From my old test set from 2008 :

[d]3rrk2/2p1n1bQ/1p3pp1/1q2B1N1/p1b1PP2/6PB/P1P5/3R1RK1 w - - 0 1

This one challenges Stockfish. Mate in 15?

Code: Select all

[d] 3rrk2/2p1n1bQ/1p3pp1/1q2B1N1/p1b1PP2/6PB/P1P5/3R1RK1 w - -


8 processor(s) found, POPCNT available
NUMA configuration with 1 node(s), offset 0
8192 MB Hash
Engine: Houdini 4 Pro x64 (8192 MB)
by Robert Houdart

18/78 0:11 +30.99 1.Be6 Qc5+ 2.Kh1 Bd3 3.cxd3 Qd4 4.Qh5 Nf5 5.Qxg6 Nh6 6.Bxd4 Rxd4 7.Nh7+ Ke7 8.Qxg7+ Kxe6 9.Qxf6+ Kd7 10.Qxd4+ Kc8 (276.686.939) 23690
19/78 0:12 +32.28++ 1.Be6 (305.733.277) 23877
19/78 0:12 +32.18 1.Be6 Qc5+ 2.Kh1 Bd3 3.cxd3 Qd4 4.Qh5 Nf5 5.Qxg6 Nh6 6.Bxd4 Rxd4 7.Nh7+ Ke7 8.Qxg7+ Kxe6 9.Qxf6+ Kd7 10.Qxd4+ Kc8 (308.347.414) 23856
20/78 0:14 +35.24 1.Be6 Qc5+ 2.Kh1 Bd3 3.cxd3 Qd4 4.Qh5 Nf5 5.Qxg6 Nh6 6.Bxd4 Rxd4 7.Nh7+ Ke7 8.Qxg7+ Kxe6 9.Qxf6+ Kd7 10.Qxd4+ Kc8 (361.556.911) 24228
21/78 0:16 +33.77-- 1.Be6 Qc5+ (406.158.603) 24791
21/78 0:18 +M17 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nxc8 5.Rd8+ Ke7 6.Rxc8 Kd7 7.Rxc7+ Qxc7 8.Qxg7+ Ke8 9.Qxc7 fxe5 (469.111.602) 25543
22/78 0:18 +M15 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nxc8 5.Rd8+ Ke7 6.Rxc8 Kd7 7.Rxc7+ Qxc7 8.Qxg7+ Ke8 9.Qxc7 fxe5 10.Qxc4 Kd7 (479.836.172) 25641
23/78 0:19 +M15 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nxc8 5.Rd8+ Ke7 6.Rxc8 Kd7 7.Rxc7+ Qxc7 8.Qxg7+ Ke8 9.Qxc7 fxe5 10.Qxc4 Kd7 (496.398.971) 25801
24/78 0:20 +M15 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nxc8 5.Rd8+ Ke7 6.Rxc8 Kd7 7.Rxc7+ Qxc7 8.Qxg7+ Ke8 9.Qxc7 fxe5 10.Qxc4 Kd7 (528.568.395) 26164


Engine: Komodo 9 64-bit (8192 MB)
by Don Dailey, Larry Kaufman, Mark Lefler
Threads now set to 8

21.01 0:09 +26.46 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nf5 5.Bxf5 Qe7 6.Qxg6 Bg8 7.Rd7 fxe5 8.Rxe7 Kxe7 9.Qxg7+ Kd6 10.Qxe5+ Kc6 (254.451.919) 25766
22.01 0:10 +26.53++ 1.Be6 (258.045.820) 25763
22.01 0:21 +M18 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nxc8 5.Rd8+ Ke7 6.Rxc8 Kd7 7.Rxc7+ Qxc7 8.Qxg7+ Ke8 9.Qxc7 fxe5 (614.074.273) 28091
23.01 0:45 +M18 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nxc8 5.Rd8+ Ke7 6.Rxc8 Kd7 7.Rxc7+ Qxc7 8.Qxg7+ Ke8 9.Qxc7 fxe5 10.Qxc4 Kd7 (1.311.087.009) 28725
24.01 1:34 +M18 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nxc8 5.Rd8+ Ke7 6.Rxc8 Kd7 7.Rxc7+ Qxc7 8.Qxg7+ Ke8 9.Qxc7 fxe5 10.Qxc4 Kd7 (2.735.241.684) 29078



Stockfish

33/58 1:27 +65.95++ 1.Be6 (1.564.765.485) 17922
33/58 1:27 +92.80++ 1.Be6 (1.572.650.474) 17929
33/58 2:13 +M16 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nxc8 5.Rd8+ Ke7 6.Rxc8 Kd7 7.Rxc7+ Qxc7 8.Qxg7+ Ke8 9.Qxc7 fxe5 10.Qxc4 Kd7 (2.424.792.687) 18136
34/58 2:26 +M16 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nxc8 5.Rd8+ Ke7 6.Rxc8 Kd7 7.Rxc7+ Qxc7 8.Qxg7+ Ke8 9.Qxc7 fxe5 10.Qxc4 Kd7 (2.654.007.784) 18150
35/58 2:33 +M16 1.Be6 Qc5+ 2.Kh1 Rxd1 3.Rxd1 Rc8 4.Bxc8 Nxc8 5.Rd8+ Ke7 6.Rxc8 Kd7 7.Rxc7+ Qxc7 8.Qxg7+ Ke8 9.Qxc7 fxe5 10.Qxc4 Kd7 (2.790.418.682) 18170

[zullil]

I tried the first one and quit

[d] 1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - - 0 1

Engine: Stockfish 280415 64 BMI2 (8192 MB)
by Tord Romstad, Marco Costalba and Joona

14/25 0:00 +12.47 1.Bxg6 axb4 2.h7 bxa3 3.Qg8 a2+ 4.Kxa2 Qc7 5.h8Q Qa5+ 6.Kb2 Qb4+ 7.Qb3 Qxb3+ 8.Kxb3 Kb7 9.Qd8 Kc6 10.Be8+ Kc5 11.Qc7+ Kd5 12.Bxb5 (657.010) 11135
15/28 0:00 +13.18 1.Bxg6 axb4 2.h7 Qf8 3.Qf7+ Qxf7 4.Bxf7 bxa3 5.h8Q a2+ 6.Kxa2 Kb6 7.Qb8+ Kc6 8.Be8+ Kc5 9.Qxb5+ Kd4 10.Qb4+ Kd5 11.Qc3 Ke4 12.Qd3+ Kf4 13.Qxd6 (1.232.524) 12838
16/28 0:00 +13.34 1.Bxg6 axb4 2.h7 Qf8 3.Qf7+ Qxf7 4.Bxf7 bxa3 5.h8Q a2+ 6.Kxa2 Kb6 7.Qb8+ Kc6 8.Be8+ Kc5 9.Qxb5+ Kd4 10.Qb4+ Kd5 11.Qb3+ Kc5 12.Qc3+ Kd5 (1.651.507) 13003
17/32 0:00 +15.86 1.Bxg6 a4 2.Bd3 Qf8 3.h7 Kb6 4.Bxb5 Qd8 5.Qc6+ Ka7 6.Qd7+ Qxd7 7.Bxd7 e4 8.h8Q e3 9.Qd4+ Kb7 10.Qxe3 Kc7 11.Bxa4 (4.648.201) 16482
18/32 0:00 +22.31 1.Bxg6 Kb6 2.h7 Qf8 3.Qg8 Qf1+ 4.Kb2 Qf6 5.bxa5+ Kc5 6.h8Q Qxh8 7.Qxh8 b4 8.Qc8+ Kd5 9.axb4 e4 10.Qb7+ Ke5 11.Qxe4+ Kf6 12.a6 (6.935.549) 16513
19/32 0:00 +49.80 1.Bxg6 axb4 2.h7 bxa3 3.Qg8 a2+ 4.Kxa2 Qb7 5.h8Q Qc7 6.Qb3 Qc4 7.Qxc4 bxc4 8.Qd8 Ka6 9.Qxd6+ Kb7 10.Be4+ Ka7 11.Qc5+ Kb8 (9.935.672) 16926
20/34 0:00 +53.12 1.Bxg6 e4 2.h7 axb4 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 bxa3 6.Bxe4 d5 7.Qa8+ Kb6 8.Qxd5 a2+ 9.Ka1 Kc7 10.Qxb5 Kd6 11.Kxa2 Ke6 (13.426.530) 17257
21/34 0:00 +53.15 1.Bxg6 e4 2.h7 axb4 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 bxa3 6.Bxe4 d5 7.Qa8+ Kb6 8.Qxd5 Ka5 9.Qd6 Ka4 10.Qd4+ Ka5 11.Qc3+ Ka4 12.Qb3+ Ka5 13.Qxa3+ Kb6 14.Qe3+ (13.506.350) 17205
22/38 0:01 +M24 1.Bxg6 e4 2.h7 e3 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 axb4 6.axb4 e2 7.Qa8+ Kb6 8.Qd8+ Ka7 9.Qd7+ Kb8 10.Qxd6+ Kc8 11.Qe6+ Kc7 12.Qe7+ Kb6 13.Qxe2 Ka6 14.Qe6+ (18.128.306) 16157
23/38 0:01 +M21 1.Bxg6 e4 2.h7 e3 3.Qd4+ Ka6 4.h8Q Qxh8 5.Qxh8 axb4 6.axb4 e2 7.Qa8+ Kb6 8.Qd8+ Ka7 9.Qe7+ Kb6 10.Qxd6+ Kb7 11.Qe7+ Kb6 12.Qxe2 Ka6 13.Qe6+ Ka7 14.Qd7+ (18.380.016) 16108
24/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.248.330) 16211
25/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.375.767) 16196
26/38 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb6 3.Be4 Kb8 4.Qg8+ Kc7 5.Qg7+ Kc8 6.h7 Qg1+ 7.Qxg1 Kd7 8.Qg7+ Ke6 9.h8Q d5 10.Qhh6+ (20.625.423) 16176

Very strange. I'm using a slightly newer version of SF, but it never finds Bxg6 so early. It always starts with Qf7+. Are you sure you started this search with a clear hash?

In any case, here's what I get:

Code: Select all

info depth 50 seldepth 38 multipv 1 score mate 9 nodes 735804710 nps 31321501 hashfull 146 tbhits 0 time 23492 pv h6h7 g6h8 d5c6 a5b4 a3b4 d6d5 e4d5 h8f7 h7h8q f7h8 c2c4 e5e4 c4b5 b8c8 b5b6 a7a6 d5c4

reboot pc, same result
[d] 1q6/k7/3p2nP/pp1Qp3/1P2B3/P7/2P5/1K6 w - -

Engine: Stockfish 280415 64 BMI2 (8192 MB)
by Tord Romstad, Marco Costalba and Joona
1/01 0:00 +5.68 1.Bxg6 (46) 11
2/02 0:00 +5.99 1.Bxg6 axb4 (97) 24
3/03 0:00 +5.99 1.Bxg6 axb4 2.axb4 (183) 45
4/04 0:00 +6.11 1.Bxg6 axb4 2.axb4 Ka6 (332) 83
5/08 0:00 +5.58 1.Qf7+ Ka6 2.Qxg6 axb4 3.axb4 Kb6 (2.063) 412
6/08 0:00 +5.71 1.Bxg6 axb4 2.axb4 Kb6 3.h7 Qf8 (3.723) 620
7/08 0:00 +5.67 1.Bxg6 axb4 2.axb4 Kb6 3.h7 Qd8 4.Bf7 (4.823) 689
8/10 0:00 +6.67 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Qb7 4.Qxd6+ Qc6 5.Qb8+ Ka6 (8.949) 1118
9/11 0:00 +7.00 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Kc7 4.h7 Qc8 5.Bxb5 (12.991) 1443
10/15 0:00 +7.31 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Qd8 4.h7 Qf8 5.Bxb5 Kc7 6.Qc6+ Kb8 (34.443) 2460
11/16 0:00 +9.15 1.Bxg6 a4 2.Bd3 Ka6 3.Qxb5+ Qxb5 4.Bxb5+ Kxb5 5.h7 Kc4 6.h8Q e4 7.Qc8+ Kd4 (135.280) 5010
12/16 0:00 +9.15 1.Bxg6 a4 2.Bd3 Ka6 3.Qxb5+ Qxb5 4.Bxb5+ Kxb5 5.h7 Kc4 6.h8Q e4 7.Qc8+ Kd4 (141.756) 5062
13/24 0:00 +11.71 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Qf8 4.h7 Kc7 5.Bxb5 Qd8 6.Qg8 Qh4 7.h8Q Qxb4+ 8.Qb3 Qxb3+ 9.cxb3 (398.096) 7238
14/24 0:00 +13.25 1.Bxg6 a4 2.Bd3 Qb6 3.h7 Qg1+ 4.Ka2 Qg7 5.Qxb5 Qf8 6.Qa5+ Kb8 7.Qb6+ Kc8 8.Bf5+ Qxf5 9.h8Q+ Kd7 10.Qhd8+ Ke6 11.Qdxd6+ Kf7 12.Qbc7+ Ke8 (533.411) 7512
15/26 0:00 +13.57 1.Bxg6 axb4 2.axb4 Kb6 3.Bd3 Kc7 4.h7 Qd8 5.Be4 Qf8 6.Qc6+ Kd8 7.Qa8+ Ke7 8.Qxf8+ Kxf8 9.h8Q+ Ke7 10.Qb8 Ke6 11.Qxb5 (829.132) 8375
16/26 0:00 +13.94 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qa7 4.axb4 Qd4 5.Qa8+ Kb6 6.Qa5+ Kc6 7.Be8+ Kb7 8.h8Q Qd1+ 9.Kb2 Qd4+ 10.Ka2 Qd5+ 11.Ka3 Qd4 (1.030.797) 8589
17/33 0:00 +14.49 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qa7 4.axb4 Qd4 5.Qa8+ Kb6 6.Qa5+ Kc6 7.Be8+ Kd5 8.Bf7+ Ke4 9.h8Q Qd1+ 10.Kb2 Qd4+ 11.Ka2 Ke3 12.Qh3+ Kd2 (1.434.529) 9137
18/33 0:00 +15.22 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qa7 4.axb4 Qd4 5.Qa8+ Kb6 6.Qa5+ Kc6 7.Be8+ Kd5 8.h8Q Qd1+ 9.Kb2 Qd4+ 10.Ka2 Qc4+ 11.Kb1 Qf1+ 12.Kb2 Ke4 13.Qh4+ Qf4 14.Qh7+ (2.653.928) 10615
19/42 0:00 +24.46 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qa7 4.axb4 Qd4 5.Qa8+ Kb6 6.Qa5+ Kc6 7.Be8+ Kd5 8.h8Q Qg1+ 9.Ka2 Ke4 10.Bc6+ d5 11.Qh7+ Kf4 12.Qf7+ Kg4 13.Qg6+ Kf4 14.Qxg1 (6.500.605) 12453
20/42 0:00 +49.87 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qxg8 4.hxg8Q bxa3 5.Qd5 Kb6 6.Qxd6+ Kb7 7.Qxe5 Kc6 8.Be4+ Kd7 9.Qxb5+ Ke6 10.Qb3+ Ke5 11.Qxa3 Kxe4 12.Qa8+ Kf4 13.Kb2 (8.661.273) 12320
21/42 0:00 +49.87 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qxg8 4.hxg8Q bxa3 5.Qd5 Kb6 6.Qxd6+ Kb7 7.Qxe5 Kc6 8.Be4+ Kd7 9.Qxb5+ Ke6 10.Qb3+ Ke5 11.Qxa3 Kxe4 12.Qa8+ Kf4 13.Kb2 Kg5 (8.718.454) 12296
22/42 0:00 +53.19 1.Bxg6 Ka6 2.h7 axb4 3.Qg8 Qxg8 4.hxg8Q bxa3 5.Qd5 a2+ 6.Kxa2 Kb6 7.Qxd6+ Kb7 8.Qxe5 Kb6 9.Bd3 Kb7 10.Bxb5 Kb6 11.Qd5 Kc7 12.Qc6+ Kb8 (9.122.335) 12098
23/42 0:00 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (11.659.413) 12324
24/42 0:00 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (11.809.902) 12353
25/42 0:00 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (12.176.539) 12450
26/42 0:00 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (12.437.669) 12525
27/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (12.799.111) 12634
28/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (13.313.476) 12776
29/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (13.891.528) 12982
30/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (14.853.939) 13286
31/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (15.974.129) 13664
32/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (16.995.661) 14011
33/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (18.593.680) 14514
34/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (20.138.227) 14994
35/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (22.349.136) 15650
36/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (26.949.451) 16195
37/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (29.410.594) 16293
38/42 0:01 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (32.514.284) 16734
39/42 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (39.990.292) 17876
40/42 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (44.776.975) 18541
41/42 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (51.024.570) 18904
42/42 0:02 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (57.170.111) 19184
43/42 0:03 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (64.461.127) 19883
44/42 0:03 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (75.785.705) 20361
45/42 0:04 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (84.426.421) 20702
46/42 0:04 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (96.665.573) 21395
47/42 0:05 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (112.259.258) 21738
48/42 0:05 +M10 1.Bxg6 axb4 2.axb4 Qb7 3.Be4 Qxd5 4.Bxd5 Kb6 5.h7 Kc7 6.h8Q Kd7 7.Qh7+ Kd8 8.Be6 Ke8 9.Qd7+ Kf8 10.Qf7+ (124.977.491) 22166
49/42 0:17 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (411.196.484) 24169
50/42 0:17 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (423.679.535) 24181
51/42 0:17 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (435.310.833) 24186
52/42 0:18 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (449.935.584) 24205
53/42 0:19 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (463.933.294) 24233
54/42 0:19 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (478.548.867) 24262
55/42 0:20 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (498.234.054) 24334
56/42 0:21 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (513.964.998) 24356
57/42 0:21 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (536.091.390) 24384
58/42 0:22 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (560.766.358) 24439
59/42 0:23 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (582.243.677) 24484
60/42 0:24 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (606.340.683) 24539
61/42 0:25 +M9 1.h7 Nh8 2.Qc6 axb4 3.axb4 d5 4.Bxd5 Nf7 5.h8R Nxh8 6.c4 Ng6 7.cxb5 Qc8 8.b6+ Ka6 9.Bc4+ (638.888.015) 24617
best move: h6-h7 time: 0:28.406 min n/s: 24.617.116 nodes: 657.691.924

Weird. Is this an official Stockfish development version? Or something else?