StockFish Default vs Modified one(Request to Marco Costalba)

Discussion of computer chess matches and engine tournaments.

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neelbasant
Posts: 226
Joined: Sun Apr 01, 2012 7:57 pm

StockFish Default vs Modified one(Request to Marco Costalba)

Post by neelbasant »

When i downloaded newer dev.. versions i could not find the parameters configuration setting Which were available in earlier versions.

So, My request to Marco is kindly revert the changes that we can change different parameters to check.

here is one example where Default SF finds the best move but takes longer time compared to Modified one.

[pgn][Event "w"]
[Site "w"]
[Date "w"]
[Round "?"]
[White "w"]
[Black "w"]
[Result "1-0"]
[ECO "B90"]
[PlyCount "2"]
[EventDate "w"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 Be6 8. Be3
Be7 9. Qd2 O-O 10. O-O-O Nbd7 11. g4 b5 12. g5 b4 13. gxf6 bxc3 14. Qxc3 Nxf6
15. Na5 Rc8 16. Nc6 Qc7 17. Nxe7+ Qxe7 18. Qa5 Rc6 19. Kb1 Rfc8 20. Rd2 Nh5 21.
Be2 Nf4 22. Bd1 Qb7 23. h4 h6 24. h5 Rb8 25. b3 Qc8
[/pgn]
neelbasant
Posts: 226
Joined: Sun Apr 01, 2012 7:57 pm

Re: StockFish Default vs Modified one(Request to Marco Costa

Post by neelbasant »

Another one good move.

Which engine finds the Novelty 20.Rd2 !! ...?
neelbasant
Posts: 226
Joined: Sun Apr 01, 2012 7:57 pm

Re: StockFish Default vs Modified one(Request to Marco Costa

Post by neelbasant »

which one finds another novelty 22. Bd1!! ............?

my Modified SF finds at ply 34...
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: StockFish Default vs Modified one(Request to Marco Costa

Post by zullil »

neelbasant wrote:Another one good move.

[d]2r3k1/4qppp/p1rpbn2/Q3p3/4P3/4BP2/PPP4P/1K1R1B1R w - - 4 20
Which engine finds the Novelty 20.Rd2 !! ...?
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: StockFish Default vs Modified one(Request to Marco Costa

Post by zullil »

neelbasant wrote:
[d]2r3k1/4qppp/p1rpb3/Q3p3/4Pn2/4BP2/PPPRB2P/1K5R w - - 8 22
which one finds another novelty 22. Bd1!! ............?

my Modified SF finds at ply 34...
neelbasant
Posts: 226
Joined: Sun Apr 01, 2012 7:57 pm

Re: StockFish Default vs Modified one(Request to Marco Costa

Post by neelbasant »

[pgn][Event "NEEL-PC, 120m/40+60m/20+30m"]
[Site "Mumbai"]
[Date "2014.06.07"]
[Round "1"]
[White "Stockfish 5 64 SSE4.2 t1"]
[Black "Komodo 7a 64-bit"]
[Result "1-0"]
[ECO "E90"]
[Annotator "0.53;0.35"]
[PlyCount "129"]
[TimeControl "40/7200:20/3600:1800"]

{AMD Phenom(tm) II X6 1075T Processor 3013 MHz W=34.1 plies; 7,057kN/s B=25.
0 plies; 6,372kN/s} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. h3
Nbd7 7. Bd3 e5 8. d5 a5 9. O-O b6 {Both last book move} 10. Bc2 {0.53/31 263}
Nh5 {0.35/25 227 (Nc5)} 11. Bg5 {0.56/32 224} Bf6 {0.45/27 257} 12. Be3 {0.55/
32 109} Nc5 {0.49/26 310 (Nf4)} 13. a3 {0.55/32 317} Nf4 {0.61/25 259 (Bg7)}
14. b4 {0.74/33 305 (Kh2)} Na6 {0.57/24 217 (Nd7)} 15. Qd2 {0.72/31 412 (Kh2)}
Bd7 {0.54/23 324 (Bg7)} 16. bxa5 {0.72/30 405 (Nb5)} bxa5 {0.60/23 225} 17.
Rab1 {0.84/33 103} g5 {0.67/24 237 (Bg7)} 18. Ne1 {1.12/30 210 (Ne2)} Kh8 {0.
81/22 304 (Qe7)} 19. f3 {1.26/32 818} Qe8 {0.74/25 221 (Qe7)} 20. Nd3 {1.29/32
93} Rg8 {0.66/21 54 (Be7)} 21. Ne2 {1.20/30 313 (Nf2)} c6 {0.91/23 368 (Be7)}
22. Nc3 {1.27/29 220} Bd8 {0.90/23 418} 23. Rfd1 {1.18/31 184 (Kh2)} c5 {0.81/
25 226 (Rg6)} 24. Rb7 {1.33/31 271 (Kh2)} Rg6 {0.67/26 259 (Bc8)} 25. Rdb1 {1.
27/32 125} a4 {0.78/26 211} 26. Nf2 {1.17/32 485 (Ne2)} Ba5 {0.74/23 104} 27.
Bd1 {1.17/32 82} Bc8 {0.77/25 550 (Nc7)} 28. R7b5 {1.38/32 178 (R7b2)} Qd8 {0.
75/24 90} 29. Qc2 {1.38/33 139 (Kh2)} Nc7 {0.85/23 201} 30. Rb8 {1.54/32 749}
Ra6 {0.84/24 212 (Rg8)} 31. Ne2 {1.43/32 97} Ne8 {1.17/25 508 (Na8)} 32. Qxa4 {
1.69/32 140} Nxe2+ {1.24/28 392 (Nf6)} 33. Bxe2 {1.56/35 124} Nc7 {1.17/28 92}
34. Qb3 {1.54/35 87} Ra7 {1.18/27 177 (Ne8)} 35. Qc2 {1.59/35 95 (Nd3)} Na6 {
1.18/26 159 (Ne8)} 36. R8b3 {1.65/31 105} Nc7 {1.16/27 136 (h5)} 37. Nd3 {1.65/
33 260} Rg8 {1.20/26 221 (Qe7)} 38. Nxc5 {2.11/30 60 (Qb2)} dxc5 {1.28/22 13}
39. Bxc5 {2.08/33 142} Ra8 {1.37/23 37} 40. Be3 {2.08/33 71 (Bf2)} Ba6 {1.28/
24 59} 41. c5 {2.34/35 330} Bxe2 {1.28/23 78} 42. Qxe2 {2.24/35 175} Qf6 {1.39/
25 160} 43. Qc4 {2.11/35 269 (Rb7)} Rgd8 {1.39/26 192} 44. Rd1 {2.12/36 665
(Rb7)} Ne6 {1.38/24 151 (Kg8)} 45. d6 {1.95/33 148} Kg8 {1.51/25 188 (Nf4)} 46.
Rb5 {2.01/31 104 (Rbb1)} Bc7 {1.66/24 165} 47. a4 {2.11/32 111 (Qb4)} h5 {1.62/
24 207 (h6)} 48. Rb7 {2.66/31 182} Qg7 {1.55/23 140 (Bb8)} 49. Rd5 {2.85/31
125 (Kh2)} Bb8 {1.64/21 57} 50. Bf2 {3.05/31 107} Qg6 {1.72/25 182} 51. Rxe5 {
3.35/35 135} g4 {1.86/24 132} 52. fxg4 {3.53/37 102} hxg4 {2.22/23 130} 53. Rb3
{3.53/38 72 (hxg4)} Ra5 {2.67/25 254 (Nxc5)} 54. Rd5 {5.46/35 119 (Rf5)} Nf4 {
4.05/25 306} 55. Rf5 {5.63/38 78} Bxd6 {4.32/27 311} 56. cxd6 {6.58/38 85} Rxf5
{4.46/28 183} 57. exf5 {7.39/37 157} Qxf5 {4.50/26 37} 58. Bg3 {7.62/39 167}
Ng6 {4.88/27 199 (Nd5)} 59. hxg4 {8.53/37 187 (Qxg4)} Qf6 {5.48/28 257 (Qg5)}
60. Rb5 {9.57/39 293 (Rf3)} Qe6 {6.09/27 364 (Nf8)} 61. Qxe6 {26.77/39 127}
fxe6 {6.20/28 13} 62. a5 {38.93/40 64} Ra8 {6.83/27 17} 63. Rb7 {40.10/50 69
(a6)} Rxa5 {8.60/29 82 (Nf8)} 64. d7 {105.77/50 310} Rd5 {250.00/30 81 (Ra1+)}
65. Rb8+ {45.18/34 62} 1-0
[/pgn]

The modified SF won against K7a .
Very good game.
neelbasant
Posts: 226
Joined: Sun Apr 01, 2012 7:57 pm

Re: StockFish Default vs Modified one(Request to Marco Costa

Post by neelbasant »

[pgn][Event "NEEL-PC, 120m/40+60m/20+30m"]
[Site "Mumbai"]
[Date "2014.06.10"]
[Round "1"]
[White "Stockfish 5 64 SSE4.2"]
[Black "Komodo 7a 64-bit"]
[Result "0-1"]
[ECO "E90"]
[Annotator "0.34;0.35"]
[PlyCount "103"]
[TimeControl "40/7200:20/3600:1800"]

{AMD Phenom(tm) II X6 1075T Processor 3013 MHz W=33.7 plies; 6,846kN/s B=25.
2 plies; 5,991kN/s} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. h3
Nbd7 7. Bd3 e5 8. d5 a5 9. O-O b6 {Both last book move} 10. Bc2 {0.34/31 185}
Nh5 {0.35/25 255 (Nc5)} 11. Bg5 {0.46/31 149 (Be3)} Bf6 {0.43/27 237} 12. Be3 {
0.52/32 111} Nf4 {0.49/25 799 (Bg7)} 13. a3 {0.52/33 368} h5 {0.56/24 363 (Bg7)
} 14. Kh2 {0.77/30 215} Nc5 {0.65/25 232 (h4)} 15. b4 {0.86/30 193 (Rb1)} axb4
{0.51/25 136 (Na6)} 16. axb4 {0.83/32 159} Rxa1 {0.48/26 112} 17. Qxa1 {1.00/
35 462} Na6 {0.62/27 171} 18. Qa3 {1.00/34 112} g5 {0.64/26 244 (Bg7)} 19. Ng1
{0.88/32 322} g4 {0.64/24 122} 20. g3 {0.90/33 153 (Ba4)} Ng6 {0.75/24 251} 21.
Bh6 {0.90/35 116} Bg7 {0.80/23 98} 22. Bd2 {0.96/33 119} Ne7 {0.62/24 309 (Qf6)
} 23. Nge2 {0.88/33 206 (Bd1)} gxh3 {0.46/23 98 (f5)} 24. f3 {1.01/30 180 (Bd1)
} Kh7 {0.54/22 206 (Qd7)} 25. Bd3 {1.09/30 357 (Nd1)} Rg8 {0.58/25 509 (Kh8)}
26. Nd1 {1.15/32 195} Nb8 {0.55/25 158} 27. c5 {1.13/33 126} dxc5 {0.53/22 63}
28. bxc5 {1.01/32 435} Nd7 {0.53/24 184} 29. cxb6 {1.04/32 631} cxb6 {0.51/23
77 (Nxb6)} 30. Bc4 {0.81/31 928 (Nf2)} Bf8 {0.47/24 178 (Nc5)} 31. Qc1 {0.92/
31 272 (Qc3)} Nc5 {0.30/22 81 (Ng6)} 32. Ndc3 {0.67/32 479 (Be3)} Ng6 {0.17/24
288 (Qd6)} 33. Bg5 {0.84/30 61 (Be3)} Be7 {0.20/26 138} 34. Be3 {0.66/32 277}
Nb7 {0.20/26 220 (Bf8)} 35. Na4 {1.01/29 61} Nc5 {0.11/25 103} 36. Nxc5 {0.98/
31 68} Bxc5 {0.11/24 53} 37. Bxc5 {0.84/33 101} bxc5 {0.10/26 52} 38. Qe3 {0.
84/34 25} Qb6 {0.10/29 311} 39. Ra1 {0.84/33 85} Bd7 {0.08/28 236 (Nf8)} 40.
Qc1 {0.20/29 49 (Qc3)} Rb8 {-0.35/24 96 (Qf6)} 41. Ra6 {0.06/40 166} Qd8 {-0.
34/24 77 (Qb1)} 42. Nc3 {0.00/36 382 (Ra7)} Rb7 {-0.53/26 301 (Rb4)} 43. Rd6 {
-0.21/33 133} h4 {-1.05/27 252} 44. g4 {-0.23/38 452} Qa5 {-1.13/25 89 (Kg7)}
45. Ra6 {-1.35/34 137 (Kxh3)} Qb4 {-1.45/26 77} 46. Ne2 {-1.46/40 152} Ba4 {-1.
57/28 148 (Bb5)} 47. Qc3 {-1.64/39 398} Bb3 {-1.59/28 124} 48. Qxb4 {-1.81/41
150 (Qxb3)} Rxb4 {-1.72/26 88} 49. Bxb3 {-1.88/42 196} Rxb3 {-1.87/28 338} 50.
Ng1 {-2.01/42 171 (Ra2)} Rb2+ {-1.91/26 90 (c4)} 51. Kxh3 {-2.04/36 101} Kh6 {
-1.97/27 149} 52. f4 {-2.07/38 94 adjud.} 0-1
[/pgn]

And Default SF reached almost lost position.
(Needed to adjudicated because of power failure).
May be this time SF Default is unlucky against K7a.

Enjoy
Neel

Note:- newer versions seem to be better compared to SF5 but we can not modify parameters .
neelbasant
Posts: 226
Joined: Sun Apr 01, 2012 7:57 pm

Re: StockFish Default vs Modified one(Request to Marco Costa

Post by neelbasant »

[pgn][Event "NEEL-PC, 120m/40+60m/20+30m"]
[Site "Mumbai"]
[Date "2014.06.13"]
[Round "1"]
[White "Stockfish 5 64 SSE4.2"]
[Black "Stockfish 5 64 SSE4.2 t1"]
[Result "0-1"]
[ECO "E90"]
[Annotator "0.36;0.37"]
[PlyCount "53"]
[TimeControl "40/7200:20/3600:1800"]

{AMD Phenom(tm) II X6 1075T Processor 3013 MHz W=31.3 plies; 6,406kN/s B=31.
9 plies; 6,330kN/s} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. h3
Nbd7 7. Bd3 e5 8. d5 a5 9. O-O b6 {Both last book move} 10. Bc2 {0.36/30 176}
Nh5 {0.37/32 191 (Nc5)} 11. Bg5 {0.46/32 147} Bf6 {0.48/31 175} 12. Be3 {0.47/
33 112} Bg7 {0.42/30 112} 13. a3 {0.53/31 114 (Kh2)} Ba6 {0.38/32 246} 14. Nd2
{0.42/32 1280} Bc8 {0.38/32 242} 15. Rb1 {0.54/32 232 (Kh2)} Nf4 {0.43/32 172}
16. Nf3 {0.54/31 98} Nf6 {0.43/33 116 (Nc5)} 17. Kh2 {0.51/31 410} h6 {0.46/31
267} 18. Re1 {0.55/30 146} g5 {0.43/33 119 (Nh7)} 19. Ng1 {0.51/31 452 (Kg1)}
Bd7 {0.44/31 171} 20. Qd2 {0.53/32 195 (f3)} Qc8 {0.46/31 191} 21. f3 {0.55/32
93} Nh7 {0.53/33 162 (N6h5)} 22. b3 {0.55/31 177 (Rbd1)} Kh8 {0.50/32 199 (Rd8)
} 23. Rec1 {0.59/31 97 (g3)} Bf6 {0.20/31 385 (f5)} 24. g3 {0.55/31 253 (Nce2)}
Rg8 {0.17/34 129} 25. Nb5 {0.63/30 279 (Nce2)} Bxh3 {-0.62/32 207 (Be7)} 26.
Bd1 {-0.17/31 344} Bd7 {-0.91/32 196} 27. Kh1 {-0.59/32 302 adjud.} 0-1
[/pgn]

SF Default could not see the 25. ......Bxh3 !!
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: StockFish Default vs Modified one(Request to Marco Costa

Post by zullil »

neelbasant wrote:
SF Default could not see the 25. ......Bxh3 !!
[d]r1q3rk/2pb1p1n/1p1p1b1p/pN1Pp1p1/2P1Pn2/PP2BPPP/2BQ3K/1RR3N1 b - - 2 25

The current development version of Stockfish does see that Bxh3 is best, though it requires depth 28 or 29 to do so:

Code: Select all

Searching: r1q3rk/2pb1p1n/1p1p1b1p/pN1Pp1p1/2P1Pn2/PP2BPPP/2BQ3K/1RR3N1 b - - 2 25
infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0

 1   -0.02   00:00     283  Nxh3 Nxh3 Bxh3 
 2   -0.12   00:00     416  Nxh3 Ne2 
 3   -0.02   00:00     853  Nxh3 Nxh3 Bxh3 
 4   -0.12   00:00    1225  Nxh3 Nxh3 Bxh3 Kh1 
 5   -0.21   00:00    2363  Nxh3 Nxh3 Bxh3 Kh1 Kg7 
 6   -0.23   00:00    3936  Nxh3 Nxh3 Bxh3 Kh1 g4 f4 exf4 Bxf4 
 7   -0.23   00:00    6616  Nxh3 Nxh3 Bxh3 Kh1 g4 f4 exf4 Bxf4 
 8   -0.38   00:00    9550  Nxh3 Nxh3 Bxh3 g4 Bxg4 Nxc7 Qxc7 fxg4 
 9   -0.14   00:00   67391  Be7 h4 Bxb5 cxb5 Nh5 g4 Nf4 Kh1 Qe8 
10   -0.10   00:00   98133  Be7 a4 Nf6 h4 N6h5 gxf4 gxf4 Bf2 Kh7 Bd3 
11   -0.36   00:00  301284  Be7 Kh1 Bxh3 Nxh3 Nxh3 Rf1 Nf6 Qh2 g4 f4 exf4 Rxf4 
                            Nxf4 Qxh6+ Nh7 Bxf4 
12   -0.34   00:00  427294  Be7 Kh1 Nxh3 Nxh3 Bxb5 cxb5 Qxh3+ Qh2 Qxh2+ Kxh2 
                            Nf6 Bd3 Rac8 Kg2 Kg7 a4 
13   -0.34   00:01   1035K  Be7 Bf2 Ng6 Nc3 f5 exf5 Bxf5 Rb2 Bxc2 Rbxc2 Kg7 
                            Qd3 Nf6 Nge2 Rf8 g4 
14   -0.25   00:02   1717K  Bxh3 Nxc7 Qxc7 Nxh3 Nxh3 Kxh3 g4+ fxg4 Qc8 Qe2 h5 
                            Bf2 Rxg4 Kh2 h4 gxh4 Bxh4 Bxb6 
15   -0.42   00:02   2188K  Bxh3 Nxc7 Qxc7 Nxh3 Nxh3 Kxh3 g4+ fxg4 Qc8 Qe2 Bg5 
                            Kg2 Bxe3 Qxe3 Ng5 Qe2 Qc5 Rh1 
16   -0.08   00:04   4261K  Bxh3 a4 Bd7 Kh1 Ng6 Qh2 Bg7 Ne2 Re8 Nec3 Kg8 Rf1 
                            Nf6 Kg2 Rf8 Kg1 
17   -0.08   00:04   4952K  Bxh3 a4 Bd7 Kh1 Bh3 Nxh3 Nxh3 Rf1 g4 fxg4 Bg5 Bxg5 
                            N7xg5 Rf5 Qd7 Rbf1 Rae8 Bd3 
18   +0.00   00:05   5815K  Bxh3 a4 Bg2 Bxf4 gxf4 Kxg2 Rxg3+ Kh1 Rh3+ Nxh3 
                            Qxh3+ Qh2 Qxf3+ Qg2 Qh5+ Qh2 Qf3+ 
19   +0.00   00:05   7301K  Bxh3 a4 Bg2 Bxf4 gxf4 Kxg2 Rxg3+ Kh1 Rh3+ Nxh3 
                            Qxh3+ Qh2 Qxf3+ Qg2 Qh5+ Qh2 Qf3+ 
20   -0.29   00:06  11332K  Bxh3 Nxc7 Qxc7 Nxh3 Nxh3 Kxh3 g4+ fxg4 Qd7 Bd1 Bg5 
                            Qf2 Rg6 Kg2 Nf6 Qf3 Bxe3 Qxe3 Nxg4 Bxg4 Qxg4 Rh1 
21   -0.46   00:07  16217K  Bxh3 Nxc7 Qxc7 Nxh3 Nxh3 Kxh3 g4+ fxg4 Qd7 Bd1 Bg5 
                            Bxg5 Rxg5 Qf2 Rg6 Kg2 Nf6 Qf5 Qd8 Be2 Rg5 Qf2 Nxe4 
                            Qxf7 
22   -0.47   00:28 347299K  Bd8 Re1 Ng6 Nc3 h5 Bd3 Bf6 Rb2 h4 g4 Nf4 Nge2 Be7 
                            Rc1 Qf8 Nb5 Qc8 Bf2 a4 Nxf4 gxf4 Kg1 Ng5 
23   -0.47   00:29 360455K  Bd8 Re1 Ng6 Nc3 h5 Rbd1 Be7 Bd3 Kg7 Rf1 Kh8 a4 Kg7 
                            Rde1 Kh8 Rb1 
24   -0.53   00:38 482546K  Be7 Qe1 Nf6 Qf1 Ng6 Ne2 Kg7 Qg2 Kh8 Bd2 h5 a4 h4 
                            g4 Nf4 Qf2 Bxb5 axb5 Nd7 Ra1 Bf6 Bc3 Kg7 Bb2 Re8 
                            Nxf4 exf4 
25   -0.53   00:40 509562K  Be7 Qe1 Nf6 Qf1 Ng6 Ne2 Kg7 Qg2 Kh8 Bd2 h5 a4 h4 
                            g4 Nf4 Qf2 Bxb5 axb5 Nd7 Ra1 Bf6 Bc3 Kg7 Bb2 Re8 
                            Nxf4 exf4 
26   -0.53   00:41 527053K  Be7 Qe1 Nf6 Qf1 Ng6 Ne2 Kg7 Qg2 Kh8 Bd2 h5 a4 h4 
                            g4 Nf4 Qf2 Bxb5 axb5 Nd7 Ra1 Bf6 Bc3 Kg7 Bb2 Re8 
                            Nxf4 exf4 
27   -0.47   00:58 762839K  Be7 Qe1 Nf6 Qf1 Ng6 Ne2 h5 Bxg5 Nxd5 Bd2 Nf6 Nbc3 
                            Nf8 Nd5 Nxd5 cxd5 Bb5 Qf2 Rg7 Nc3 Ba6 Be3 Bf6 g4 
                            Ng6 Bh6 Nf4 Bxg7+ Kxg7 
28   +0.15   01:39   1374M  Bxh3 b4 axb4 axb4 Bd7 Kh1 Nh3 Qh2 g4 Nxh3 gxh3 
                            Bxh6 Rg6 Be3 Bg5 Re1 Bxe3 Rxe3 c5 dxc6 Qxc6 Rd1 Qxc4 
                            Nxd6 Rxd6 
29   +0.15   02:12   1863M  Bxh3 a4 h5 Re1 Bg2 Bxf4 gxf4 Kxg2 Rxg3+ Kh1 Ng5 
                            Re2 h4 Rh2 h3 Qd3 Qd7 Rf1 Rg8 Ne2 Rg6 Nxg3 fxg3 Rg1 
                            Nh7 Re2 Bh4 Ra1 g2+ Kg1 Bg3 Rd1 
30   +0.23   02:24   2021M  Bxh3 a4 h5 Re1 Bd7 gxf4 gxf4 Bf2 h4 Bd3 Rg7 Bf1 
                            Be7 Ne2 f5 exf5 Bxf5 Rbd1 Bf6 Kh1 Qd7 Ned4 exd4 Nxd4 
                            Be5 Nxf5 Qxf5 Qd3 Qxd3 Bxd3 Ng5 
31   +0.23   02:27   2067M  Bxh3 a4 h5 Re1 Bd7 gxf4 gxf4 Bf2 h4 Bd3 Rg7 Bf1 
                            Be7 Ne2 f5 exf5 Bxf5 Rbd1 Bf6 Kh1 Qd7 Ned4 exd4 Nxd4 
                            Be5 Nxf5 Qxf5 Qd3 Qxd3 Bxd3 Ng5 
Nodes: 2067428118
Nodes/second: 14003455
Best move: Bxh3
Ponder move: a4
neelbasant
Posts: 226
Joined: Sun Apr 01, 2012 7:57 pm

Re: StockFish Default vs Modified one(Request to Marco Costa

Post by neelbasant »

zullil wrote:
neelbasant wrote:
SF Default could not see the 25. ......Bxh3 !!
[d]r1q3rk/2pb1p1n/1p1p1b1p/pN1Pp1p1/2P1Pn2/PP2BPPP/2BQ3K/1RR3N1 b - - 2 25

The current development version of Stockfish does see that Bxh3 is best, though it requires depth 28 or 29 to do so:

Code: Select all

Searching: r1q3rk/2pb1p1n/1p1p1b1p/pN1Pp1p1/2P1Pn2/PP2BPPP/2BQ3K/1RR3N1 b - - 2 25
infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0

 1   -0.02   00:00     283  Nxh3 Nxh3 Bxh3 
 2   -0.12   00:00     416  Nxh3 Ne2 
 3   -0.02   00:00     853  Nxh3 Nxh3 Bxh3 
 4   -0.12   00:00    1225  Nxh3 Nxh3 Bxh3 Kh1 
 5   -0.21   00:00    2363  Nxh3 Nxh3 Bxh3 Kh1 Kg7 
 6   -0.23   00:00    3936  Nxh3 Nxh3 Bxh3 Kh1 g4 f4 exf4 Bxf4 
 7   -0.23   00:00    6616  Nxh3 Nxh3 Bxh3 Kh1 g4 f4 exf4 Bxf4 
 8   -0.38   00:00    9550  Nxh3 Nxh3 Bxh3 g4 Bxg4 Nxc7 Qxc7 fxg4 
 9   -0.14   00:00   67391  Be7 h4 Bxb5 cxb5 Nh5 g4 Nf4 Kh1 Qe8 
10   -0.10   00:00   98133  Be7 a4 Nf6 h4 N6h5 gxf4 gxf4 Bf2 Kh7 Bd3 
11   -0.36   00:00  301284  Be7 Kh1 Bxh3 Nxh3 Nxh3 Rf1 Nf6 Qh2 g4 f4 exf4 Rxf4 
                            Nxf4 Qxh6+ Nh7 Bxf4 
12   -0.34   00:00  427294  Be7 Kh1 Nxh3 Nxh3 Bxb5 cxb5 Qxh3+ Qh2 Qxh2+ Kxh2 
                            Nf6 Bd3 Rac8 Kg2 Kg7 a4 
13   -0.34   00:01   1035K  Be7 Bf2 Ng6 Nc3 f5 exf5 Bxf5 Rb2 Bxc2 Rbxc2 Kg7 
                            Qd3 Nf6 Nge2 Rf8 g4 
14   -0.25   00:02   1717K  Bxh3 Nxc7 Qxc7 Nxh3 Nxh3 Kxh3 g4+ fxg4 Qc8 Qe2 h5 
                            Bf2 Rxg4 Kh2 h4 gxh4 Bxh4 Bxb6 
15   -0.42   00:02   2188K  Bxh3 Nxc7 Qxc7 Nxh3 Nxh3 Kxh3 g4+ fxg4 Qc8 Qe2 Bg5 
                            Kg2 Bxe3 Qxe3 Ng5 Qe2 Qc5 Rh1 
16   -0.08   00:04   4261K  Bxh3 a4 Bd7 Kh1 Ng6 Qh2 Bg7 Ne2 Re8 Nec3 Kg8 Rf1 
                            Nf6 Kg2 Rf8 Kg1 
17   -0.08   00:04   4952K  Bxh3 a4 Bd7 Kh1 Bh3 Nxh3 Nxh3 Rf1 g4 fxg4 Bg5 Bxg5 
                            N7xg5 Rf5 Qd7 Rbf1 Rae8 Bd3 
18   +0.00   00:05   5815K  Bxh3 a4 Bg2 Bxf4 gxf4 Kxg2 Rxg3+ Kh1 Rh3+ Nxh3 
                            Qxh3+ Qh2 Qxf3+ Qg2 Qh5+ Qh2 Qf3+ 
19   +0.00   00:05   7301K  Bxh3 a4 Bg2 Bxf4 gxf4 Kxg2 Rxg3+ Kh1 Rh3+ Nxh3 
                            Qxh3+ Qh2 Qxf3+ Qg2 Qh5+ Qh2 Qf3+ 
20   -0.29   00:06  11332K  Bxh3 Nxc7 Qxc7 Nxh3 Nxh3 Kxh3 g4+ fxg4 Qd7 Bd1 Bg5 
                            Qf2 Rg6 Kg2 Nf6 Qf3 Bxe3 Qxe3 Nxg4 Bxg4 Qxg4 Rh1 
21   -0.46   00:07  16217K  Bxh3 Nxc7 Qxc7 Nxh3 Nxh3 Kxh3 g4+ fxg4 Qd7 Bd1 Bg5 
                            Bxg5 Rxg5 Qf2 Rg6 Kg2 Nf6 Qf5 Qd8 Be2 Rg5 Qf2 Nxe4 
                            Qxf7 
22   -0.47   00:28 347299K  Bd8 Re1 Ng6 Nc3 h5 Bd3 Bf6 Rb2 h4 g4 Nf4 Nge2 Be7 
                            Rc1 Qf8 Nb5 Qc8 Bf2 a4 Nxf4 gxf4 Kg1 Ng5 
23   -0.47   00:29 360455K  Bd8 Re1 Ng6 Nc3 h5 Rbd1 Be7 Bd3 Kg7 Rf1 Kh8 a4 Kg7 
                            Rde1 Kh8 Rb1 
24   -0.53   00:38 482546K  Be7 Qe1 Nf6 Qf1 Ng6 Ne2 Kg7 Qg2 Kh8 Bd2 h5 a4 h4 
                            g4 Nf4 Qf2 Bxb5 axb5 Nd7 Ra1 Bf6 Bc3 Kg7 Bb2 Re8 
                            Nxf4 exf4 
25   -0.53   00:40 509562K  Be7 Qe1 Nf6 Qf1 Ng6 Ne2 Kg7 Qg2 Kh8 Bd2 h5 a4 h4 
                            g4 Nf4 Qf2 Bxb5 axb5 Nd7 Ra1 Bf6 Bc3 Kg7 Bb2 Re8 
                            Nxf4 exf4 
26   -0.53   00:41 527053K  Be7 Qe1 Nf6 Qf1 Ng6 Ne2 Kg7 Qg2 Kh8 Bd2 h5 a4 h4 
                            g4 Nf4 Qf2 Bxb5 axb5 Nd7 Ra1 Bf6 Bc3 Kg7 Bb2 Re8 
                            Nxf4 exf4 
27   -0.47   00:58 762839K  Be7 Qe1 Nf6 Qf1 Ng6 Ne2 h5 Bxg5 Nxd5 Bd2 Nf6 Nbc3 
                            Nf8 Nd5 Nxd5 cxd5 Bb5 Qf2 Rg7 Nc3 Ba6 Be3 Bf6 g4 
                            Ng6 Bh6 Nf4 Bxg7+ Kxg7 
28   +0.15   01:39   1374M  Bxh3 b4 axb4 axb4 Bd7 Kh1 Nh3 Qh2 g4 Nxh3 gxh3 
                            Bxh6 Rg6 Be3 Bg5 Re1 Bxe3 Rxe3 c5 dxc6 Qxc6 Rd1 Qxc4 
                            Nxd6 Rxd6 
29   +0.15   02:12   1863M  Bxh3 a4 h5 Re1 Bg2 Bxf4 gxf4 Kxg2 Rxg3+ Kh1 Ng5 
                            Re2 h4 Rh2 h3 Qd3 Qd7 Rf1 Rg8 Ne2 Rg6 Nxg3 fxg3 Rg1 
                            Nh7 Re2 Bh4 Ra1 g2+ Kg1 Bg3 Rd1 
30   +0.23   02:24   2021M  Bxh3 a4 h5 Re1 Bd7 gxf4 gxf4 Bf2 h4 Bd3 Rg7 Bf1 
                            Be7 Ne2 f5 exf5 Bxf5 Rbd1 Bf6 Kh1 Qd7 Ned4 exd4 Nxd4 
                            Be5 Nxf5 Qxf5 Qd3 Qxd3 Bxd3 Ng5 
31   +0.23   02:27   2067M  Bxh3 a4 h5 Re1 Bd7 gxf4 gxf4 Bf2 h4 Bd3 Rg7 Bf1 
                            Be7 Ne2 f5 exf5 Bxf5 Rbd1 Bf6 Kh1 Qd7 Ned4 exd4 Nxd4 
                            Be5 Nxf5 Qxf5 Qd3 Qxd3 Bxd3 Ng5 
Nodes: 2067428118
Nodes/second: 14003455
Best move: Bxh3
Ponder move: a4
But after Bxh3 the resulting position should favor Black..
Or Still white is better ?