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 Some people say Stockfish is unbeatable

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Chris Whittington




Posts : 1254
Join date : 2020-11-17
Location : France

Some people say Stockfish is unbeatable Empty
PostSubject: Some people say Stockfish is unbeatable   Some people say Stockfish is unbeatable EmptyWed Mar 01, 2023 12:50 am

Chess-System-Tal speculative sacrifice against SF14, and a very nice instructive win, if I say so myself

[pgn][Event "?"]
[Site "?"]
[Date "2023.03.01"]
[Round "84"]
[White "Stockfish_14"]
[Black "Chess-System-Tal-1.59"]
[Result "0-1"]
[ECO "D11"]
[Opening "QGD Slav"]
[Variation "4.e3"]
[TimeControl "20+0.05"]
[Termination "adjudication"]
[PlyCount "209"]
[GameDuration "00"]
[GameEndTime "2023-03-01T00.687 W. Europe Standard Time"]
[GameStartTime "2023-03-01T00.733 W. Europe Standard Time"]

1. d4 { book } 1... d5 { book } 2. c4 { book } 2... c6 { book } 3. Nf3 {
book } 3... Nf6 { book } 4. e3 { book } 4... a6 { book } 5. Nc3 { book }
5... Bf5 { book } 6. Qb3 { book } 6... b5 { book } 7. c5 { book } 7... Nbd7
{ book } 8. a4 { book } 8... g6 { book } 9. Qa3 { +1.25/19 1.4s } 9... b4 {
-1.53/17 0.79s } 10. Qxb4 { +1.25/17 0.30s } 10... Rb8 { -0.88/19 1.0s }
11. Qa3 { +1.22/18 0.31s } 11... a5 { -0.51/17 0.75s } 12. Be2 { +1.31/17
0.30s } 12... Bg7 { -0.35/16 0.37s } 13. Na2 { +1.10/18 0.62s } 13... Ne4 {
-0.89/17 0.51s } 14. O-O { +0.99/18 0.53s } 14... O-O { -0.62/17 0.86s }
15. b4 { +0.85/19 0.83s } 15... Bg4 { -0.65/16 0.61s } 16. Re1 { +1.37/15
0.26s } 16... e5 { -0.60/14 0.51s } 17. Bb2 { +1.10/18 0.55s } 17... Bxf3 {
-1.17/15 1.1s } 18. Bxf3 { +1.29/15 0.28s } 18... f5 { -0.72/15 0.71s } 19.
b5 { +1.27/16 0.35s } 19... exd4 { -0.36/15 0.48s } 20. Bxd4 { +1.48/20
1.5s } 20... Ne5 { -0.57/14 0.55s } 21. Be2 { +1.33/17 0.28s } 21... f4 {
-0.51/16 0.70s } 22. exf4 { +1.36/15 0.23s } 22... Rxf4 { -0.56/14 0.45s }
23. Be3 { +1.04/18 0.70s } 23... Qh4 { +0.95/12 0.38s } 24. g3 { +2.64/15
0.22s } 24... Rg4 { +0.63/14 0.73s } 25. bxc6 { +2.58/18 0.57s } 25... Nxg3
{ +2.78/13 0.29s } 26. hxg3 { -0.85/23 2.1s } 26... Rxg3+ { +2.67/15 0.35s
} 27. fxg3 { -1.11/22 0.41s } 27... Qxg3+ { +1.88/14 0.27s } 28. Kh1 {
-1.18/21 0.19s } 28... Nf3 { +3.03/17 0.52s } 29. Bxf3 { -1.38/20 0.21s }
29... Qxf3+ { +2.90/17 0.49s } 30. Kg1 { -0.99/21 0.23s } 30... Be5 {
+2.23/18 0.30s } 31. Bf4 { -0.89/20 0.40s } 31... Bd4+ { +2.83/15 0.21s }
32. Be3 { -1.06/20 0.20s } 32... Be5 { 0.00/8 0.005s } 33. Bf4 { -0.97/20
0.26s } 33... Bd4+ { 0.00/4 0.006s } 34. Be3 { -1.10/21 0.36s } 34... Qg3+
{ +1.81/17 0.51s } 35. Kh1 { -1.07/20 0.19s } 35... Rb2 { +2.15/15 0.25s }
36. Qxb2 { -0.87/19 0.29s } 36... Bxb2 { +1.98/16 0.23s } 37. c7 { -0.84/18
0.19s } 37... Qh3+ { +1.63/14 0.21s } 38. Kg1 { -0.95/18 0.26s } 38... Be5
{ +2.59/16 0.48s } 39. Rad1 { -0.95/17 0.20s } 39... Bh2+ { +2.61/16 0.27s
} 40. Kf2 { -0.91/18 0.23s } 40... Bxc7 { +2.40/17 0.46s } 41. Rg1 {
-1.96/18 0.53s } 41... Qh4+ { +2.70/16 0.22s } 42. Kf3 { -1.91/18 0.32s }
42... Bh2 { +1.72/16 0.30s } 43. Rgf1 { -2.14/21 0.89s } 43... Qe4+ {
+1.53/17 0.26s } 44. Kf2 { -1.96/18 0.12s } 44... Be5 { +1.67/18 0.21s }
45. Nc1 { -2.05/17 0.15s } 45... d4 { +1.79/18 0.17s } 46. Bd2 { -2.25/18
0.17s } 46... Qg4 { +1.63/18 0.22s } 47. Rg1 { -2.21/17 0.22s } 47... Qf5+
{ +1.55/17 0.37s } 48. Ke2 { -1.87/18 0.16s } 48... Qe4+ { +3.00/13 0.14s }
49. Kf2 { -2.07/18 0.43s } 49... Qf5+ { 0.00/4 0.002s } 50. Ke2 { -2.18/19
0.27s } 50... Qe4+ { 0.00/4 0.002s } 51. Kf2 { -2.01/17 0.15s } 51... Bf6 {
+2.76/14 0.14s } 52. Rg3 { -1.76/15 0.13s } 52... Bh4 { +2.63/16 0.39s }
53. Rg1 { -1.75/15 0.18s } 53... h5 { +3.06/14 0.24s } 54. Ne2 { -1.77/14
0.13s } 54... Qf5+ { +2.80/12 0.24s } 55. Kg2 { -1.66/16 0.25s } 55... Bxg3
{ +2.45/15 0.15s } 56. Nxg3 { -1.76/14 0.18s } 56... Qc2 { +2.92/15 0.11s }
57. Nf1 { -1.68/15 0.17s } 57... Kf7 { +2.46/14 0.25s } 58. Kf2 { -1.45/14
0.14s } 58... Qf5+ { +2.14/13 0.19s } 59. Ke1 { -1.55/15 0.26s } 59... h4 {
+1.94/15 0.43s } 60. Rg2 { -1.51/14 0.13s } 60... Qxc5 { +2.00/14 0.17s }
61. Nh2 { -2.06/19 0.96s } 61... h3 { +3.30/12 0.17s } 62. Rg3 { -2.16/17
0.10s } 62... d3 { +1.27/13 0.22s } 63. Rxh3 { -2.25/18 0.16s } 63... Qe5+
{ +2.39/14 0.13s } 64. Be3 { -2.38/18 0.20s } 64... Qa1+ { +2.51/17 0.14s }
65. Kf2 { -3.08/18 0.35s } 65... Qb2+ { +2.47/17 0.17s } 66. Kg3 { -2.45/16
0.098s } 66... Qe2 { +2.83/18 0.11s } 67. Ng4 { -3.26/15 0.23s } 67... Qe1+
{ +3.13/15 0.14s } 68. Kf4 { -2.67/17 0.49s } 68... d2 { +3.42/13 0.082s }
69. Bxd2 { -2.24/15 0.043s } 69... Qxd2+ { +3.61/15 0.11s } 70. Re3 {
-3.12/15 0.16s } 70... Qd6+ { +3.69/16 0.17s } 71. Kg5 { -3.95/16 0.37s }
71... Qb4 { +3.64/18 0.087s } 72. Re2 { -2.62/11 0.087s } 72... Kg7 {
+3.97/15 0.17s } 73. Re6 { -3.87/13 0.062s } 73... Qd2+ { +4.38/14 0.16s }
74. Ne3 { -1.42/13 0.021s } 74... Qd4 { +5.23/15 0.090s } 75. Rxg6+ {
-3.35/11 0.059s } 75... Kf7 { +3.12/12 0.11s } 76. Ng4 { -3.01/11 0.019s }
76... Qxa4 { +3.25/14 0.19s } 77. Nh6+ { -3.45/11 0.051s } 77... Ke7 {
+3.49/13 0.14s } 78. Rf6 { -4.10/10 0.12s } 78... Qa2 { +3.74/13 0.14s }
79. Nf5+ { -4.74/10 0.064s } 79... Kd7 { +4.11/12 0.21s } 80. Ra6 {
-4.64/10 0.052s } 80... a4 { +4.43/12 0.077s } 81. Kf6 { -4.55/10 0.033s }
81... Qb2+ { +5.08/12 0.11s } 82. Kf7 { -4.73/12 0.068s } 82... a3 {
+5.46/12 0.12s } 83. Ra7+ { -4.64/10 0.014s } 83... Kc6 { +5.20/11 0.10s }
84. Ne7+ { -4.60/11 0.030s } 84... Kc5 { +5.82/12 0.10s } 85. Ra5+ {
-4.38/11 0.023s } 85... Kb6 { +6.79/12 0.082s } 86. Rxa3 { -2.96/12 0.050s
} 86... Qxa3 { +6.71/13 0.070s } 87. Ng6 { -2.72/12 0.050s } 87... Qf3+ {
+6.81/12 0.094s } 88. Ke6 { -2.66/11 0.027s } 88... Qe4+ { +7.10/16 0.098s
} 89. Kf6 { -3.83/15 0.14s } 89... Qc6+ { +6.90/16 0.091s } 90. Kf5 {
-3.54/12 0.038s } 90... Qd7+ { +6.94/16 0.080s } 91. Kf6 { -3.07/13 0.054s
} 91... Qd5 { +7.17/15 0.083s } 92. Nf4 { -3.12/14 0.065s } 92... Qd4+ {
+7.33/16 0.076s } 93. Kf5 { -2.80/13 0.016s } 93... Kc6 { +7.26/17 0.064s }
94. Nh5 { -5.34/15 0.085s } 94... Kd6 { +7.07/16 0.091s } 95. Nf4 {
-2.56/14 0.007s } 95... Qe5+ { +7.66/14 0.047s } 96. Kg4 { -5.52/15 0.017s
} 96... Qe4 { +7.68/16 0.061s } 97. Kg3 { -3.97/18 0.036s } 97... Qe3+ {
+8.61/16 0.074s } 98. Kg4 { -3.95/16 0.023s } 98... Ke5 { +10.08/16 0.042s
} 99. Ng2 { -M56/20 0.15s } 99... Qf2 { +12.17/16 0.078s } 100. Kh3 {
-M18/20 0.018s } 100... Qf3+ { +M19/19 0.034s } 101. Kh2 { -M16/27 0.012s }
101... Ke4 { +M15/29 0.030s } 102. Nh4 { -M14/30 0.015s } 102... Qg4 {
+M13/29 0.023s } 103. Ng2 { -M10/36 0.018s } 103... Kf3 { +M11/39 0.029s }
104. Ne1+ { -M8/66 0.021s } 104... Kf2 { +M9/42 0.029s } 105. Nd3+ {
-M6/245 0.019s, Black wins by adjudication } 0-1
[/pgn]

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Mclane

Mclane


Posts : 2948
Join date : 2020-11-17
Age : 57
Location : United States of Europe, Germany, Ruhr area

Some people say Stockfish is unbeatable Empty
PostSubject: Re: Some people say Stockfish is unbeatable   Some people say Stockfish is unbeatable EmptyWed Mar 01, 2023 1:02 am

This was easy
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mwyoung

mwyoung


Posts : 880
Join date : 2020-11-25
Location : USA

Some people say Stockfish is unbeatable Empty
PostSubject: Re: Some people say Stockfish is unbeatable   Some people say Stockfish is unbeatable EmptyThu Mar 02, 2023 11:12 am

Here is the deep analysis of the game. It was not the knight sacrifice that won the game. But a pure endgame blunder by this Stockifish 14 at move 39 Rad1?? a -3.26 error . a move the current version of stockfish would never play. 39.Nc3 holds the draw.

[pgn][Event "?"]
[Site "?"]
[Date "2023.03.01"]
[Round "84"]
[White "Stockfish_14"]
[Black "Chess-System-Tal-1.59"]
[Result "0-1"]
[ECO "D11"]
[PlyCount "209"]
[EventDate "2023.??.??"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 a6 5. Nc3 Bf5 6. Qb3 b5 {D15: Slav Defence: 4 Nc3 a6 and gambit lines after 4 Nc3 dxc4.} 7. c5 Nbd7 8. a4 g6 {1.15/46} (8... e5 $14 {0.39/46}) 9. Qa3 {0.45/54} (9. Nh4 $1 $16 {1.15/46}) 9... b4 $1 $14 10. Qxb4 Rb8 {Repels Qb7} 11. Qa3 a5 12. Be2 Bg7 13. Na2 Ne4 14. O-O O-O 15. b4 $1 {[#] Threatens to win with Bb2.} Bg4 $146 ({Predecessor:} 15... Qc8 16. Nh4 e5 17. Nxf5 gxf5 18. f3 exd4 19. fxe4 d3 20. Bxd3 fxe4 21. Bxe4 dxe4 {1-0 Shinkevich,V (2503)-Airapetian,G (2328) Chigorin Memorial-A 14th St Petersburg 2006 (2)}) 16. Re1 (16. h3 $5 Bxf3 17. gxf3 $14 (17. Bxf3 Ng5 $11)) 16... e5 17. Bb2 Bxf3 18. Bxf3 f5 {[#]} 19. b5 $1 exd4 (19... Qh4 20. g3 (20. bxc6 Qxf2+ 21. Kh1 Ndf6 $14) 20... Qf6 21. Be2 $16) 20. Bxd4 Ne5 21. Be2 f4 (21... Qh4 22. g3 Qh3 23. Nc3 Nxf2 24. Qa2 $16) (21... Ng4 {simplifies} 22. Bxg4 Bxd4 23. exd4 fxg4 24. Nc3 Nxc3 25. Qxc3 cxb5 26. axb5 Rxb5 27. Re6 Qb8) 22. exf4 Rxf4 23. Be3 {This pair of bishops is nice.} (23. Qe3 $5 Qg5 24. g3 Nf3+ 25. Bxf3 Rxf3 26. Qxg5 (26. Qxf3 Bxd4 27. Rxe4 dxe4 $17) 26... Nxg5 27. Bxg7 Kxg7 28. bxc6 $14) 23... Qh4 24. g3 Rg4 {Strongly threatening ...Nxg3!} 25. bxc6 {-0.37/40 [#]} (25. Bxg4 Qxg4 26. Rac1 Nf3+ 27. Kf1 Qh3+ 28. Ke2 Qxh2 $19) (25. Kg2 $1 $11 {0.00/62} Rf8 26. Qb3) 25... Nxg3 $1 $15 {Demolition} 26. hxg3 {[#]} (26. fxg3 Rxg3+) 26... Rxg3+ $1 {Demolition} 27. fxg3 Qxg3+ 28. Kh1 Nf3 29. Bxf3 Qxf3+ 30. Kg1 $1 Be5 {( -> ...Rf8!). Black has compensation.} 31. Bf4 $1 Bd4+ $1 $40 {Black has some attack.} 32. Be3 Be5 33. Bf4 $1 Bd4+ $1 34. Be3 Qg3+ 35. Kh1 $1 Rb2 36. Qxb2 Bxb2 37. c7 $1 Qh3+ 38. Kg1 Be5 {The board is on fire.} 39. Rad1 $2 {-3.26/54 White does not recover from this.} (39. Nc3 $1 $11 {-0.15/55}) 39... Bh2+ $19 40. Kf2 Bxc7 41. Rg1 {[#] Dodges Bg3+} Qh4+ $1 42. Kf3 Bh2 (42... Qxa4 $2 43. Nc3 Qh4 44. Nxd5 Qh5+ 45. Kf2 Qh2+ 46. Kf1 $18 (46. Rg2 Qh4+ 47. Kg1 Bh2+ 48. Kf1 Be5 $18)) 43. Rgf1 {Nc3 is the strong threat.} Qe4+ (43... Qxa4 $2 44. Nc3 Qc6 45. Ke2 $18 (45. Nxd5 Be5 $18)) 44. Kf2 Be5 {Prevents Nc3. ...d4 would be deadly.} (44... Qxa4 45. Nc3 Qc2+ 46. Ne2 $14) 45. Nc1 d4 (45... Qxa4 46. Rxd5 (46. Nd3 Bc3 $11) 46... Qg4 47. Rg1 $14 (47. Rxe5 Qh4+ 48. Kf3 Qh3+ 49. Ke2 Qh2+ 50. Kd3 Qxe5 $14)) 46. Bd2 Qg4 47. Rg1 {Prevents Bg3+} (47. Bxa5 $2 Qg3+ 48. Ke2 Qe3#) 47... Qf5+ 48. Ke2 Qe4+ 49. Kf2 Qf5+ 50. Ke2 Qe4+ 51. Kf2 Bf6 {Hoping for ...Bh4+.} 52. Rg3 Bh4 53. Rdg1 h5 (53... Bxg3+ 54. Rxg3 Qf5+ 55. Ke2 $17) 54. Ne2 Qf5+ (54... Bxg3+ 55. Rxg3 Qf5+ 56. Rf3 Qxc5 57. Rf4 $19) 55. Kg2 {aiming for Rxg6+!} Bxg3 (55... Qxc5 $2 56. Rxg6+ Kf7 57. Kh2 $18) 56. Nxg3 Qc2 (56... Qxc5 57. Ne4 Qc8 58. Kf3 Qh3+ 59. Rg3 Qf1+ 60. Nf2 $19) 57. Nf1 Kf7 58. Kf2 Qf5+ (58... Qxc5 59. Rg5 Qb6 60. Rxa5 $17) ({Weaker is} 58... Qxa4 59. Nh2 $15) 59. Ke1 h4 {White must now prevent ...d3.} ({Stronger than} 59... Qxc5 60. Rg5 Qe7+ 61. Kf2 $17) 60. Rg2 $2 {-5.56/35} (60. Rg5 {-2.87/38} Qe4+ 61. Kf2) 60... Qxc5 61. Nh2 h3 62. Rg3 {[#]} d3 $1 63. Rxh3 (63. Rf3+ Kg8) 63... Qe5+ 64. Be3 Qa1+ 65. Kf2 Qb2+ ({Inferior is} 65... Qxa4 66. Nf3 $17) 66. Kg3 Qe2 67. Ng4 Qe1+ 68. Kf4 d2 69. Bxd2 Qxd2+ {Endgame. KQ-KRN} 70. Re3 Qd6+ 71. Kg5 Qb4 72. Re2 Kg7 73. Re6 Qd2+ 74. Ne3 Qd4 {And now ...Kf7 would win.} 75. Rxg6+ Kf7 76. Ng4 Qxa4 {-1/0} (76... Ke7 $19 {-10.53/40} 77. Nf6 Kf7) 77. Nh6+ {Black mates.} Ke7 78. Rf6 Qa2 79. Nf5+ Kd7 80. Ra6 a4 81. Kf6 Qb2+ 82. Kf7 a3 83. Ra7+ Kc6 84. Ne7+ Kc5 85. Ra5+ Kb6 86. Rxa3 Qxa3 87. Ng6 Qf3+ 88. Ke6 Qe4+ 89. Kf6 Qc6+ 90. Kf5 Qd7+ 91. Kf6 Qd5 92. Nf4 Qd4+ 93. Kf5 Kc6 94. Nh5 Kd6 95. Nf4 Qe5+ 96. Kg4 Qe4 97. Kg3 Qe3+ 98. Kg4 Ke5 99. Ng2 Qf2 100. Kh3 Qf3+ 101. Kh2 Ke4 102. Nh4 Qg4 103. Ng2 Kf3 104. Ne1+ Kf2 105. Nd3+ {Ingenious play by Chess-System-Tal-1.59! Weighted Error Value: White=0.21 (precise) /Black=0.08 (flawless) . Loses game: White=1 --- Missed win: --- --- Mistake: White=3 Black=1 Inaccurate: White=3 Black=1 OK: White=22 Black=26 Best: White=10 Black=9 Strong: White=5 Black=2 Brilliant: --- Black=2} 0-1

[/pgn]

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Brendan




Posts : 394
Join date : 2020-11-18
Age : 40

Some people say Stockfish is unbeatable Empty
PostSubject: Re: Some people say Stockfish is unbeatable   Some people say Stockfish is unbeatable EmptyThu Mar 02, 2023 3:44 pm

mwyoung wrote:
Here is the deep analysis of the game. It was not the knight sacrifice that won the game. But a pure endgame blunder by this Stockifish 14 at move 39 Rad1??  a -3.26 error . a move the current version of stockfish would never play. 39.Nc3 holds the draw.

[pgn][Event "?"]
[Site "?"]
[Date "2023.03.01"]
[Round "84"]
[White "Stockfish_14"]
[Black "Chess-System-Tal-1.59"]
[Result "0-1"]
[ECO "D11"]
[PlyCount "209"]
[EventDate "2023.??.??"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 a6 5. Nc3 Bf5 6. Qb3 b5 {D15: Slav Defence: 4 Nc3 a6 and gambit lines after 4 Nc3 dxc4.} 7. c5 Nbd7 8. a4 g6 {1.15/46} (8... e5 $14 {0.39/46}) 9. Qa3 {0.45/54} (9. Nh4 $1 $16 {1.15/46}) 9... b4 $1 $14 10. Qxb4 Rb8 {Repels Qb7} 11. Qa3 a5 12. Be2 Bg7 13. Na2 Ne4 14. O-O O-O 15. b4 $1 {[#] Threatens to win with Bb2.} Bg4 $146 ({Predecessor:} 15... Qc8 16. Nh4 e5 17. Nxf5 gxf5 18. f3 exd4 19. fxe4 d3 20. Bxd3 fxe4 21. Bxe4 dxe4 {1-0 Shinkevich,V (2503)-Airapetian,G (2328) Chigorin Memorial-A 14th St Petersburg 2006 (2)}) 16. Re1 (16. h3 $5 Bxf3 17. gxf3 $14 (17. Bxf3 Ng5 $11)) 16... e5 17. Bb2 Bxf3 18. Bxf3 f5 {[#]} 19. b5 $1 exd4 (19... Qh4 20. g3 (20. bxc6 Qxf2+ 21. Kh1 Ndf6 $14) 20... Qf6 21. Be2 $16) 20. Bxd4 Ne5 21. Be2 f4 (21... Qh4 22. g3 Qh3 23. Nc3 Nxf2 24. Qa2 $16) (21... Ng4 {simplifies} 22. Bxg4 Bxd4 23. exd4 fxg4 24. Nc3 Nxc3 25. Qxc3 cxb5 26. axb5 Rxb5 27. Re6 Qb8) 22. exf4 Rxf4 23. Be3 {This pair of bishops is nice.} (23. Qe3 $5 Qg5 24. g3 Nf3+ 25. Bxf3 Rxf3 26. Qxg5 (26. Qxf3 Bxd4 27. Rxe4 dxe4 $17) 26... Nxg5 27. Bxg7 Kxg7 28. bxc6 $14) 23... Qh4 24. g3 Rg4 {Strongly threatening ...Nxg3!} 25. bxc6 {-0.37/40 [#]} (25. Bxg4 Qxg4 26. Rac1 Nf3+ 27. Kf1 Qh3+ 28. Ke2 Qxh2 $19) (25. Kg2 $1 $11 {0.00/62} Rf8 26. Qb3) 25... Nxg3 $1 $15 {Demolition} 26. hxg3 {[#]} (26. fxg3 Rxg3+) 26... Rxg3+ $1 {Demolition} 27. fxg3 Qxg3+ 28. Kh1 Nf3 29. Bxf3 Qxf3+ 30. Kg1 $1 Be5 {( -> ...Rf8!). Black has compensation.} 31. Bf4 $1 Bd4+ $1 $40 {Black has some attack.} 32. Be3 Be5 33. Bf4 $1 Bd4+ $1 34. Be3 Qg3+ 35. Kh1 $1 Rb2 36. Qxb2 Bxb2 37. c7 $1 Qh3+ 38. Kg1 Be5 {The board is on fire.} 39. Rad1 $2 {-3.26/54 White does not recover from this.} (39. Nc3 $1 $11 {-0.15/55}) 39... Bh2+ $19 40. Kf2 Bxc7 41. Rg1 {[#] Dodges Bg3+} Qh4+ $1 42. Kf3 Bh2 (42... Qxa4 $2 43. Nc3 Qh4 44. Nxd5 Qh5+ 45. Kf2 Qh2+ 46. Kf1 $18 (46. Rg2 Qh4+ 47. Kg1 Bh2+ 48. Kf1 Be5 $18)) 43. Rgf1 {Nc3 is the strong threat.} Qe4+ (43... Qxa4 $2 44. Nc3 Qc6 45. Ke2 $18 (45. Nxd5 Be5 $18)) 44. Kf2 Be5 {Prevents Nc3. ...d4 would be deadly.} (44... Qxa4 45. Nc3 Qc2+ 46. Ne2 $14) 45. Nc1 d4 (45... Qxa4 46. Rxd5 (46. Nd3 Bc3 $11) 46... Qg4 47. Rg1 $14 (47. Rxe5 Qh4+ 48. Kf3 Qh3+ 49. Ke2 Qh2+ 50. Kd3 Qxe5 $14)) 46. Bd2 Qg4 47. Rg1 {Prevents Bg3+} (47. Bxa5 $2 Qg3+ 48. Ke2 Qe3#) 47... Qf5+ 48. Ke2 Qe4+ 49. Kf2 Qf5+ 50. Ke2 Qe4+ 51. Kf2 Bf6 {Hoping for ...Bh4+.} 52. Rg3 Bh4 53. Rdg1 h5 (53... Bxg3+ 54. Rxg3 Qf5+ 55. Ke2 $17) 54. Ne2 Qf5+ (54... Bxg3+ 55. Rxg3 Qf5+ 56. Rf3 Qxc5 57. Rf4 $19) 55. Kg2 {aiming for Rxg6+!} Bxg3 (55... Qxc5 $2 56. Rxg6+ Kf7 57. Kh2 $18) 56. Nxg3 Qc2 (56... Qxc5 57. Ne4 Qc8 58. Kf3 Qh3+ 59. Rg3 Qf1+ 60. Nf2 $19) 57. Nf1 Kf7 58. Kf2 Qf5+ (58... Qxc5 59. Rg5 Qb6 60. Rxa5 $17) ({Weaker is} 58... Qxa4 59. Nh2 $15) 59. Ke1 h4 {White must now prevent ...d3.} ({Stronger than} 59... Qxc5 60. Rg5 Qe7+ 61. Kf2 $17) 60. Rg2 $2 {-5.56/35} (60. Rg5 {-2.87/38} Qe4+ 61. Kf2) 60... Qxc5 61. Nh2 h3 62. Rg3 {[#]} d3 $1 63. Rxh3 (63. Rf3+ Kg8) 63... Qe5+ 64. Be3 Qa1+ 65. Kf2 Qb2+ ({Inferior is} 65... Qxa4 66. Nf3 $17) 66. Kg3 Qe2 67. Ng4 Qe1+ 68. Kf4 d2 69. Bxd2 Qxd2+ {Endgame. KQ-KRN} 70. Re3 Qd6+ 71. Kg5 Qb4 72. Re2 Kg7 73. Re6 Qd2+ 74. Ne3 Qd4 {And now ...Kf7 would win.} 75. Rxg6+ Kf7 76. Ng4 Qxa4 {-1/0} (76... Ke7 $19 {-10.53/40} 77. Nf6 Kf7) 77. Nh6+ {Black mates.} Ke7 78. Rf6 Qa2 79. Nf5+ Kd7 80. Ra6 a4 81. Kf6 Qb2+ 82. Kf7 a3 83. Ra7+ Kc6 84. Ne7+ Kc5 85. Ra5+ Kb6 86. Rxa3 Qxa3 87. Ng6 Qf3+ 88. Ke6 Qe4+ 89. Kf6 Qc6+ 90. Kf5 Qd7+ 91. Kf6 Qd5 92. Nf4 Qd4+ 93. Kf5 Kc6 94. Nh5 Kd6 95. Nf4 Qe5+ 96. Kg4 Qe4 97. Kg3 Qe3+ 98. Kg4 Ke5 99. Ng2 Qf2 100. Kh3 Qf3+ 101. Kh2 Ke4 102. Nh4 Qg4 103. Ng2 Kf3 104. Ne1+ Kf2 105. Nd3+ {Ingenious play by Chess-System-Tal-1.59!   Weighted Error Value: White=0.21 (precise) /Black=0.08 (flawless) .  Loses game:     White=1     ---        Missed win:     ---       ---        Mistake:       White=3     Black=1      Inaccurate:     White=3     Black=1      OK:         White=22     Black=26     Best:         White=10     Black=9      Strong:       White=5     Black=2      Brilliant:       ---       Black=2} 0-1

[/pgn]  


Interesting analysis.

Even so, to beat Stockfish 14 in such swashbuckling fashion reminds me of Chess System Tal sacrificing an exchange against Chess Genius in the old days.

Always masterful at blurring the edges of the horizon and outsmarting giants.

@Chris: When do I get to try this monster on my machine? Laughing Twisted Evil
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Damir Desevac

Damir Desevac


Posts : 317
Join date : 2020-11-27
Age : 43
Location : Denmark

Some people say Stockfish is unbeatable Empty
PostSubject: Re: Some people say Stockfish is unbeatable   Some people say Stockfish is unbeatable EmptyThu Mar 02, 2023 6:10 pm

Chris when can we expect CS Tal to be released?
How long do we have to wait?
I am tired of waiting Smile
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Some people say Stockfish is unbeatable Empty
PostSubject: Re: Some people say Stockfish is unbeatable   Some people say Stockfish is unbeatable Empty

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Some people say Stockfish is unbeatable
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