Dagegen ist man machtlos!

Man kann an Büchern feilen soviel man will, manchmal staunt man trotzdem nur. Als ich bei dieser Partie den weißen Springer suchte, war er plötzlich nicht mehr da. Gerade noch gesehen, war er plötzlich verschwunden.

PGN:

[Event "Rated game, 5 min"]
[Site "Engine Room"]
[Date "2021.04.25"]
[Round "?"]
[White "OldFire, SugaR AI 2.00 avx2"]
[Black "Victorious, Stockfish 250421"]
[Result "0-1"]
[ECO "C67"]
[WhiteElo "2711"]
[BlackElo "2701"]
[Annotator "-0.09;0.00"]
[PlyCount "94"]
[EventDate "2021.04.25"]
[SourceTitle "playchess.com"]
[TimeControl "300"]

{Stockfish 250421 (30 threads): 35.8 plies; 19.419kN/s Intel(R) Xeon(R) CPU
E5-2690 0 @ 2.90GHz 2893MHz, (16 cores, 32 threads), eddi-eng-bullet.ctg, 2048
MB} 1. e4 {B 0} e5 {B 1} 2. Nf3 {B 0} Nc6 {B 1} 3. Bb5 {B 0} Nf6 {B 1} 4. O-O {
B 0} Nxe4 {B 1} 5. d4 {B 0} Nd6 {B 1} 6. Bxc6 {B 0} dxc6 {B 1} 7. dxe5 {B 0}
Nf5 {B 1} 8. Qxd8+ {B 0} Kxd8 {B 1} 9. Nc3 {B 0} Bd7 {B 1} 10. h3 {B 0} h6 {B 1
} 11. b3 {B 0} Kc8 {B 1} 12. Bb2 {B 0} b6 {B 1} 13. Rad1 {B 0} c5 {B 1} 14. Nd5
{B 0} a5 {B 1} 15. a4 {B 0} Ne7 {B 1} 16. c4 {B 0} Nxd5 {B 1} 17. cxd5 {B 0}
Bf5 {B 1} 18. Rd2 {B 0} Be7 {0.00/39 11} 19. Nh2 {B 0} h5 {-0.28/31 5} 20. f4 {
B 0} Kb7 {-0.16/33 4} 21. Rfd1 {B 0} Rad8 {-0.24/27 4} 22. Nf1 {B 0} h4 {
-0.18/30 6} 23. Ne3 {B 0} Be4 {-0.28/32 6} 24. Bc3 {B 0} Rh5 {-0.08/43 28} 25.
Kf2 {B 0} f6 {0.00/42 5} 26. Ng4 {B 0} fxe5 {-0.48/33 5} 27. Bxe5 {B 0} Bf8 {
-0.41/42 27} 28. Ne3 {B 0} Rh6 {-0.37/29 2} 29. Nc4 {B 0} Bg6 {-0.41/33 4} 30.
d6 {B 0} cxd6 {-0.17/40 6} 31. Bxd6 {B 0} Bxd6 {-0.14/39 4} 32. Nxd6+ {B 0} Kc6
{-0.16/39 3} 33. Nc4 {B 0} Rxd2+ {-0.06/38 4} 34. Rxd2 {B 0} Bf5 {0.00/37 5}
35. Kf3 {B 0} Kc7 {0.00/38 4} 36. Ne3 {-0.09/39 33} Bd7 {-0.08/53 1 (Be6)} 37.
Nd5+ {0.00/41 7} Kb7 {-0.09/41 1} 38. Nxb6 {0.00/42 5} Bc6+ {-5.99/26 3} 39.
Nd5 {0.00/43 6} Rh5 {-6.72/29 4 (Re6)} 40. Ke4 {-6.14/35 30} g6 {-7.43/28 5}
41. Rd3 {-6.60/39 7} Kc8 {-7.94/30 1 (Rf5)} 42. g4 {-6.60/34 7} hxg3 {-8.62/28
4} 43. Rxg3 {-6.60/34 1} Bxd5+ {-8.95/26 2} 44. Kd3 {-6.63/33 3} Bxb3 {-9.49/
28 4 (Bf7)} 45. Kd2 {-8.79/30 70} Bf7 {-12.56/34 1} 46. Rc3 {-9.02/28 16} c4 {
-14.17/27 12 (Kd7)} 47. Rf3 {-10.33/26 20} Kd7 {-16.35/28 8 OldFire,SugaR AI 2.
00 avx2 resigns (Lag: Av=0.18s, max=0.8s)} 0-1

Was war passiert?

OldFire,S - Victorious,S 0-1, Rated game, 5 min 2021


SugaR AI meinte dass der schwarze Bauer auf b6 gefressen werden kann. So wurde 38. Nxb6 {0.00/42 5} nach 5s gespielt. Unfassbar, denn gleich danach sah sich die Engine immer noch bei 0.00 und der Gegner aber bei +6 für sich.

Hier einige Analysen (wichtig ist dass die HT gelöscht sind und die Lerndatei ebenfalls).

Analysis by Cfish 110421 64 AVX2 NUMA:

38.Nxb6 Bc6+ 39.Nd5 Re6 40.Rd1 Rg6 41.f5 Rg3+ 42.Kf4 Bxd5 43.Rxd5 Kc6 44.Rd8 Rxb3 45.Rg8 Rb7 46.Ke4 Rd7 47.Rc8+ Rc7 48.Re8 c4 49.Kd4 c3 50.Re2 Kd6 51.Rc2 Rb7 52.Rxc3 Rb4+ 53.Rc4 Rb2 54.Kc3 Rxg2 55.Rxh4 Ke5 56.Kc4 Rb2 57.Rg4 Kxf5 58.Rxg7 Rb4+ 59.Kc5 Rxa4
  = (-0.16 --)  Depth: 46/55   00:00:13  369MN, tb=1238889
38.Nxb6 Bc6+ 39.Nd5 Re6 40.Rd1 Rg6 41.f5 Rg3+ 42.Kf4 Bxd5 43.Rxd5 Kc6 44.Rd8 Rxb3 45.Rg8 Rb7 46.Ke4 Rd7 47.Rc8+ Rc7 48.Re8 c4 49.Kd4 c3 50.Re2 Kd6 51.Rc2 Rb7 52.Rxc3 Rb4+ 53.Rc4 Rb2 54.Kc3 Rxg2 55.Rxh4 Ke5 56.Kc4 Rb2 57.Rg4 Kxf5 58.Rxg7 Rb4+ 59.Kc5 Rxa4
  = (-0.28 --)  Depth: 46/55   00:00:14  408MN, tb=1305129
38.Ne3
  = (-0.18 ++)  Depth: 46/62   00:00:28  814MN, tb=2493167

8/1k1b2p1/1p5r/p1pN4/P4P1p/1P3K1P/3R2P1/8 w - - 0 1

Analysis by SugaR AI 2.00 avx2:

38.Nxb6 Bc6+ 39.Nd5 Rg6 40.Ke4 Re6+ 41.Kf5 Bd7 42.Kg5 Rd6 43.Rd1 Be6 44.Nc3 Rxd1 45.Nxd1 Bxb3 46.Nc3 Kc6 47.Kxh4 c4 48.f5 Kc5 49.g4 Kb4 50.g5 Bxa4 51.Nxa4 Kxa4 52.f6 gxf6 53.gxf6
  = (-0.28 --)  Depth: 47/32   00:00:15  452MN, tb=1665770
38.Ne3
  = (-0.18 ++)  Depth: 47/50   00:00:20  593MN, tb=2183880
38.Ne3 Be6 39.Rd3 Rg6 40.f5 Rg3+ 41.Kf4 Bg8 42.Ke5 b5 43.Kd6 c4 44.bxc4 Bxc4 45.Rc3 Ka6 46.Kc5 b4 47.Rxc4 Rxe3 48.Rg4 Rc3+ 49.Kd4 Rc7 50.Rg6+ Kb7 51.Rg5 Kb6 52.Rg6+ Rc6 53.Rxg7 b3 54.Rg8 Ka7 55.Rg7+ Kb8 56.Rg8+ Kb7
  = (0.00)  Depth: 47/50   00:00:24  713MN, tb=2599532

OldFire,S - Victorious,S 0-1, Rated game, 5 min 2021
8/1k1b2p1/1p5r/p1pN4/P4P1p/1P3K1P/3R2P1/8 w - - 0 1

Analysis by Eman 6.95 64-bit AVX2:

38.Ne3 Be6 39.Rd3 Rg6 40.Ke4 Bg8 41.f5 Rg3 42.Kf4 Kc6 43.Ke5 b5 44.axb5+ Kxb5 45.Kf4 c4
  = (-0.26)  Depth: 10/17   00:00:00
38.Ne3 Be6 39.Rd3 Rg6 40.Ke4 Rg3 41.Ke5 Bf7 42.f5 Kc6 43.Rd6+ Kc7
  = (0.00)  Depth: 11/17   00:00:00
38.Ne3 Be6 39.Rd3 Rg6 40.Ke4 Rg3 41.Ke5 Bf7 42.f5 Kc6 43.Rd6+ Kc7 44.Rd3
  = (0.00)  Depth: 12/20   00:00:00
38.Ne3 Be6 39.Rd3 Rg6 40.f5 Rg3+ 41.Ke4 Bg8 42.Ke5 b5 43.axb5 Kb6 44.Ke4 Kxb5 45.Kf4 Bf7 46.Ke4
  = (0.00)  Depth: 13/20   00:00:00  15249kN, tb=37694
38.Ne3 Be6 39.Rd3 Rg6 40.f5 Rg3+ 41.Ke4 Bg8 42.Rd7+ Kc6 43.Rd3
  = (0.00)  Depth: 14/23   00:00:01  28095kN, tb=44536
38.Nxb6 Bc6+ 39.Nd5 Re6 40.Rd1 Rg6 41.f5 Rg3+ 42.Kf4 Rxb3 43.Ke5 Rb2 44.Rc1 Bxa4 45.Ra1 Bb5 46.Rxa5 Kc6 47.Nc3 Bf1 48.Ne4
  = (-0.11)  Depth: 15/32   00:00:01  40422kN, tb=49724
38.Nxb6 Bc6+ 39.Nd5 Re6 40.Rd1 Rg6 41.f5 Rg3+ 42.Kf4 Rxb3 43.Ke5 Rb2 44.Rc1 Bxa4 45.Ra1 Bb3 46.Rxa5 Bxd5 47.Kxd5 Kb6 48.Ra4 Rb4 49.Ra8 Rf4 50.Ke5 Rf2 51.Ra4 Kc6 52.Rxh4 Rxg2
  = (-0.19)  Depth: 16/32   00:00:02  60727kN, tb=60065
38.Nxb6 Bc6+ 39.Nd5 Re6 40.Rd1 Rg6 41.f5 Rg3+ 42.Kf4 Rxb3 43.Ke5 c4 44.Rc1 Rd3 45.Nf4 Bxa4 46.Rxc4 Bb5 47.Rc5 Rb3 48.Nd5 a4 49.Rc7+ Ka6 50.Rxg7 a3 51.Rg8 Bc6
  = (-0.29)  Depth: 17/36   00:00:03  94150kN, tb=74672
38.Nxb6 Bc6+ 39.Nd5 Re6 40.Rd1 Rg6 41.f5 Rg3+ 42.Kf4 Rxb3 43.Ke5 c4 44.Rc1 Rd3 45.Nf4 Bxa4 46.Rxc4 Bb5 47.Rc5 Rb3 48.Ne6 a4 49.Rc1 Rb2 50.Nxg7 Re2+ 51.Kf6
  = (-0.02)  Depth: 18/36   00:00:03  105MN, tb=77466
(---)
38.Nxb6 Bc6+ 39.Nd5 Re6 40.Rd1 Rg6 41.f5 Rg3+ 42.Kf4 Bxd5 43.Rxd5 Kc6 44.Rd8 Rxb3 45.Kg5 c4 46.Kxh4 Rb6 47.g4 Kc5 48.g5 c3 49.Rc8+ Rc6 50.Rxc6+ Kxc6 51.f6 gxf6 52.g6 c2 53.g7 c1Q 54.g8Q Qf4+ 55.Qg4 Qh6+ 56.Kg3 Qe3+ 57.Kg2 Qd2+ 58.Kf3 Qd1+ 59.Kg3 Qe1+ 60.Kf4 Qe5+ 61.Kf3 Kd6 62.Qe4 Qxe4+ 63.Kxe4
  = (0.00)  Depth: 50/52   00:01:23  2842MN, tb=4440067
38.Nxb6 Bc6+ 39.Nd5 Re6 40.Rd1 Rg6 41.f5 Rg3+ 42.Kf4 Rxb3 43.Ke5 Ka6 44.Nc7+ Kb6 45.Nd5+
  = (0.00)  Depth: 51/17   00:01:23  2859MN, tb=4520180