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Up Topic The Rybka Lounge / Computer Chess / Engine programmers, test your engines material imbalance.
- By rocket (***) [se] Date 2017-11-20 13:34 Edited 2017-11-20 13:50
In the game below, Deep Fritz 10.1 concidered winning the queen and two pawns in exchange for a knight, bishop and a rook, to be favourable for white.

The reality is that this material count favors black. White is strategically lost and has to fight to hold a draw.



[Event "DESKTOP-M7G326U, Blitz:5'+3""]
[Site "DESKTOP-M7G326U"]
[Date "2017.11.19"]
[Round "2"]
[White "Deep Fritz 10"]
[Black "Stockfish 8 64 POPCNT"]
[Result "0-1"]
[ECO "C55"]
[Annotator "0.29;0.15"]
[PlyCount "126"]
[TimeControl "300+3"]

{Intel(R) Celeron(R) CPU  N3050  @ 1.60GHz  W=14.0 plies; 1 340kN/s; 15 072
TBAs  B=22.8 plies; 805kN/s} 1. e4 {White last book move Black last book move}
e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bc4 {0.29/13 12} Nxe4 {0.15/21 16 (Bb4)} 5. Nxe4 {
0.15/14 22} d5 {0.29/18 2} 6. Bd3 {0.12/15 19} dxe4 {0.24/21 9} 7. Bxe4 {0.03/
15 17} Nd4 {0.21/20 3 (Ne7)} 8. Nxe5 {0.50/13 13 (Nxd4)} Qe7 {-0.39/20 7 (Bd6)}
9. O-O {0.48/15 12 (f4)} Qxe5 {-0.52/21 5} 10. Re1 {0.48/15 9} Qe7 {-0.47/19 2}
11. Bxb7 {0.68/15 6} Bxb7 {-0.32/25 17} 12. Rxe7+ {0.61/16 4} Bxe7 {-0.37/24 5}
13. c3 {0.55/16 10} Ne6 {-0.45/24 8} 14. Qb3 {0.63/16 13} Nc5 {-0.37/22 3} 15.
Qb4 {0.64/16 16 (Qb5+)} a5 {-0.64/21 6} 16. Qb5+ {0.50/16 10} c6 {-0.68/24 11}
17. Qe2 {0.46/16 8} Ne6 {-0.60/23 3 (0-0)} 18. d4 {0.35/15 13} O-O {-0.74/21 9}
19. h3 {0.10/14 19 (Be3)} a4 {-0.62/21 13} 20. Qf3 {-0.11/14 17} Rfb8 {-0.70/
24 58} 21. Qe4 {0.09/14 8} Bf6 {-0.67/24 11} 22. Qf5 {-0.04/14 8 (Rb1)} Ba6 {
-0.87/19 4 (Rd8)} 23. Qf3 {0.00/13 9 (Qe4)} Bb5 {-1.24/20 5 (Bb7)} 24. Be3 {-0.
12/13 9 (g3)} Ra6 {-1.21/24 19 (Rc8)} 25. Bf4 {-0.18/13 7 (Qe4)} Nxf4 {-1.29/
23 6} 26. Qxf4 {-0.38/14 6} Re8 {-1.24/24 10} 27. Qc7 {-0.38/15 10 (Qd6)} Raa8
{-1.37/21 5} 28. Qb7 {-0.38/15 6 (Qb6)} Rec8 {-1.72/21 9 (Rab8)} 29. Re1 {-0.
26/16 8 (Qd7)} Bc4 {-1.95/23 5} 30. a3 {-0.30/16 7} Bd5 {-1.92/23 25 (Rab8)}
31. Qb4 {-0.27/13 9 (Re2)} g6 {-2.00/23 13 (Rcb8)} 32. h4 {-0.23/13 6 (Kh2)} h5
{-2.33/22 6} 33. c4 {-0.57/14 5} Be6 {-2.35/25 18} 34. Qd6 {-0.94/14 6} Kg7 {
-2.61/20 1} 35. Rxe6 {-0.68/14 4} fxe6 {-2.80/21 7} 36. Qxe6 {-0.75/14 9} Rc7 {
-2.68/19 1 (Rd8)} 37. d5 {-1.55/14 8 (g3)} cxd5 {-3.15/21 8} 38. cxd5 {-1.54/
14 8} Rf8 {-3.08/18 1 (Rd8)} 39. Qe4 {-1.44/13 4 (f3)} Re7 {-3.53/21 5 (Rc1+)}
40. Qb4 {-1.32/14 5} Re2 {-3.54/19 3 (Ra7)} 41. f4 {-1.37/13 5 (f3)} Rd8 {-3.
60/22 8} 42. b3 {-1.37/13 5} axb3 {-3.79/20 1} 43. Qxb3 {-1.37/13 4} Rd2 {-4.
17/22 7} 44. Qb7+ {-1.78/13 9} Kh6 {-4.25/20 1} 45. Qc6 {-1.79/11 3 (Qf7)} Bd4+
{-4.74/21 4} 46. Kh2 {-2.23/14 4} Rxd5 {-4.90/20 2} 47. a4 {-2.23/14 8} Rc5 {
-5.13/22 4 (Rf5)} 48. Qa8 {-2.25/14 3 (Qe8)} Rf5 {-5.46/25 4} 49. Qe4 {-2.39/
14 4} Bg7 {-7.21/31 42} 50. Qe3 {-2.49/14 4} Rd4 {-7.84/22 3} 51. g3 {-2.50/14
5 (Kg3)} Rxa4 {-9.12/22 3} 52. Kg2 {-2.79/13 4} Ra2+ {-10.25/22 4 (Kh7)} 53.
Kf3 {-4.32/14 5} Kh7 {-10.43/21 1} 54. Qe6 {-4.62/13 5 (g4)} Rfa5 {-46.66/23 3}
55. Qe1 {-4.95/12 3} Ra1 {-48.14/22 1 (R5a3+)} 56. Qe2 {-5.81/12 7} R5a4 {-51.
31/26 3 (R1a3+)} 57. Qb5 {-6.07/13 3} R4a3+ {-51.43/26 1} 58. Ke4 {-8.12/14 3
(Kg2)} Rd1 {-60.08/25 4} 59. Qb4 {-8.41/15 7 (Qc5)} Rd4+ {-#19/25 4 (Rxg3)} 60.
Qxd4 {-5.98/13 0} Bxd4 {-#18/25 1} 61. Kxd4 {-8.47/13 7} Rxg3 {-#15/32 4} 62.
Ke4 {-15.47/15 6 (Kd5)} Rg4 {-#14/35 4} 63. Ke5 {-15.75/14 6 (Ke3)} Kg7 {-#13/
37 4 (Rxh4)} 0-1

If your engine conciders the position advantageous for white after the trades.. you are well adviced to tweak the parameters, because it is strategically close to lost.
- By rocket (***) [se] Date 2017-11-20 13:41
If your engine has a correct evaluation and material value, the eval should be around -50 after the trades. Any strong human player knows this because white has no breaks to attack due to the pawn structure and will fight to hold a draw.

Not stating that black is objectively winning, but he is much better.
Up Topic The Rybka Lounge / Computer Chess / Engine programmers, test your engines material imbalance.

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