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Up Topic The Rybka Lounge / Test Positions / But what about correspondence chess?
- By MrKris (***) Date 2020-11-09 21:07
This position is from a brief discussion I saw on Discord.
I sometimes like the term 'quasi-chess' regarding engines (pseudo- would be false, too much) because of
opposite colored bishops, over-optimistically rushing to advantages that draw (TCEC), blockades, human problems etc.
It is difficult because a simple engine move should win also sometimes , as here, but without strong humans or problemists who would know when engines are wrong or less than best.

For example not having seen the solution from a human maybe even Crystal is missing something from the 15"/move:


[Event "15 secs./move, 8GBh, Sy.6"]
[Site "R7 2700X 14th"]
[Date ""]
[Round ""]
[White "Crystal-201019"]
[Black "Cfish-201024"]
[Result "1-0"]
[FEN "1B1r4/rp2npkp/2b1pbp1/1qp5/nPN1R3/1P1P1QP1/2P2PBP/5R1K w - - 0 1"]
[PlyCount "46"]
[SetUp "1"]
[Termination "adjudication"]
[TimeControl "15/move"]

{'+' and '-' to mover not white} 1. Qxf6+ {+8.40/24 15s}
(1.Bxa7 {? I ran a blitz game, not shown, where white won somewhat easily with the pawn and strong bishop pair.})
(1.bxa4 {?! from Cfish-Pure} 1... Bxe4 2.Qxf6+ Kxf6 3.Be5+ Kg5 4.axb5 Bxg2+ 5.Kxg2 Ra2 6.bxc5 {white has pawns for the exchange} )
(1.bxa4 {?!} Qxb4 2.Bxa7 Bxe4 3.Qxe4 Nc6 4.c3 Bxc3 5.Bb6 {with a bishop vs. pawn} )
1... Kxf6 {-7.31/32 15s} 2. Be5+ {+13.19/27 15s}
Kg5 {-10.64/39 15s The ? in 1.Bxa7?: a normal 9 or 10 resign score would end it right here.} 3. Bg7 {+13.25/30 15s} Bxe4 {-11.01/42 15s}
4. f4+ {+13.50/29 15s} Kh5 {-11.32/40 15s} 5. Bxe4 {+13.71/30 15s}
g5 {-11.40/40 15s} 6. Ne5 {+13.72/30 15s} Qc6 {-11.66/37 15s}
7. Bf6 {+13.64/29 15s} h6 {-11.66/38 15s} 8. fxg5 {+13.85/29 15s}
Qxe4+ {-8.96/31 15s} 9. dxe4 {+13.96/29 15s} hxg5 {-9.17/30 15s}
10. Bxe7 {+13.85/29 15s} Rg8 {-9.22/33 15s} 11. Rxf7 {+14.02/27 15s}
Kh6 {-7.98/31 15s} 12. bxa4 {+14.07/27 15s} Rxa4 {-8.26/31 15s}
13. Bxc5 {+13.98/27 15s} b6 {-8.40/31 15s} 14. Bf8+ {+14.19/28 15s}
Rxf8 {-9.10/31 15s} 15. Rxf8 {+14.28/30 15s} Rxb4 {-9.37/30 15s}
16. Rf6+ {+14.57/28 15s} Kg7 {-9.43/31 15s} 17. Rg6+ {+14.62/27 15s}
Kf8 {-9.19/29 15s} 18. Rxe6 {+15.07/27 15s} b5 {-9.88/27 15s}
19. Kg2 {+24.28/25 15s} Rb2 {-10.69/27 15s} 20. Kf3 {+144.31/35 15s}
Rxc2 {-11.34/31 15s} 21. Kg4 {+M41/40 15s} Rc7 {-298.74/50 15s}
22. Kxg5 {+M25/36 15s} Rb7 {-M34/65 15s} 23. Kf6 {+M21/33 15s}
Kg8 {-M20/104 15s, White wins by adjudication} 1-0
FEN: 1B1r4/rp2npkp/2b1pbp1/1qp5/nPN1R3/1P1P1QP1/2P2PBP/5R1K w - - 0 1 

                   Lc0 and Cfish (at defaults) fail at 6 minuets:

Lc0.24.1-Ls14.3:
  1/2  00:02             2  166  +0.91  1.Bxa7 Nc3
?21/52  06:09        4,320k  12k  +2.27  1.Bxa7 Bxe4 2.dxe4 e5 3.bxc5 Nxc5 4.Qc3 Ne6 5.Bb6 Rd7 6.Ra1 h5 7.h4 Nc8 8.Ba5 Ne7 9.Bf1 Qc6 10.Nb6 Rd8 11.Qxc6 Nxc6 12.Nd5 Nxa5 13.Rxa5 g5 14.hxg5 Bxg5 15.Rb5 h4 16.Kg2 hxg3 17.fxg3 Nd4 18.Rc5 Ra8 19.Bd3

Cfish-201024:  Hybrid NNUE evaluation using nn-eba324f53044.nnue enabled.
  1/1  00:00           830  415k  +2.01  1.Bxa7 Bxe4 2.Qxe4
?55/81  06:00    5,554,621k  15,430k  +2.92  1.Bxa7 Bxe4 2.dxe4 e5 3.Ra1 Qxb4 4.Qe3 b5 5.bxa4 Qxc4 6.Bf1 Qxc2 7.axb5 c4 8.Rc1 Qb2 9.Bxc4 Nc8 10.b6 Rd2 11.Rf1 Rd4 12.Qc1 Qb4 13.Qb1 Qxc4 14.b7 Nxa7 15.b8Q Nc6 16.Q8b3 Qe2 17.Kg2 Nd8 18.Re1 Qg4 19.h3 Qd7 20.Qb5 Qe7 21.h4 Ne6 22.Q1b3 h6 23.Qe3 Rb4 24.Qa5 Rd4 25.Rb1 h5 26.Rb8 Rd8 27.Rb5 Rd4 28.Qa2 Qd8 29.Ra5 Rd3 30.Qee2 Rd7 31.Rd5 Qe7 32.Qea6 Bxh4 33.Rxe5 Bf6 34.Rxe6 fxe6 35.Q6xe6 h4 36.Qg8+ Kh6 37.Qc2 Rd8 38.Qc1+ g5 39.Qgc4 hxg3 40.fxg3 Kg7

(Engines and Arena restarted:)

                  PV=4 : Cfish succeeds at only 32 seconds, 
                         Lc0 fails at 8 minuets although at higher depth than above.
                  
Lc0.24.1-Ls14.3 PV=4 :
... ... ... ---------------------------------------------------------------------------
 23/61  07:57        5,595k  12k  -2.11  1.Nd6 Qb6 2.Nc4 Rxb8 3.Nxb6 Nxb6 4.bxc5 Nbd5 5.d4 b5 6.c4 bxc4 7.bxc4 Nb4 8.Qf4
 23/61  07:57        5,595k  12k  +0.50  1.Qxf6+ Kxf6 2.Be5+ Kg5 3.Bg7 Bxe4 4.Bxe4 Qxc4 5.f4+ Kg4 6.bxc4 Nf5 7.Bf6 Ne3 8.Bf3+ Kf5 9.Bxd8 Nxf1 10.Be4+
 23/61  07:57        5,595k  12k  +0.29  1.bxa4 Rxa4 2.Qxf6+ Kxf6 3.Be5+ Kg5 4.Rh4 Bxg2+ 5.Kxg2 Qc6+ 6.Kg1 Qf3 7.Nd2 Qe2 8.Ne4+ Kf5 9.f4 g5 10.Rh6 Ng6 11.h3 gxf4 12.gxf4 Qe3+ 13.Kg2 Qe2+ 14.Kg1 Qe3+ 15.Kh2 Qe2+ 16.Kg1
?23/61  07:57        5,595k  12k  +2.43  1.Bxa7 Bxe4 2.dxe4 e5 3.Ra1 Qxb4 4.Qe3 b5 5.bxa4 Qxc4 6.Bf1 Qxc2 7.axb5 c4 8.Qe2 Qc3 9.Ra4 Nc8 10.Qxc4 Qe1 11.Kg2 h6 12.h4 Rd1 13.Be3 Nd6 14.Qe2 Qxe2 15.Bxe2 Rb1 16.b6 Rb2 17.Ba6 Be7 18.Kf1 f5 19.Bd3 fxe4 20.Bxe4 Nxe4 21.Rxe4 Bd8 22.Rxe5 Bxb6 23.Re7+ Kf8 24.Rb7 Bd4 25.Bxh6+

Cfish-201024 PV=4 :  Hybrid NNUE evaluation using nn-eba324f53044.nnue enabled.
... ... ... ---------------------------------------------------------------------------
 32/49  00:32      470,159k  15,408k  -0.34  1.Bc7 Bxe4 2.dxe4 Nc8 3.e5 Be7 4.Bxd8 Bxd8 5.Qd3 Be7 6.bxa4 Rxa4 7.Nd6 Nxd6 8.exd6 Qxd3 9.cxd3 Bxd6 10.bxc5 Bxc5 11.Bxb7 Ra3 12.f4 Rxd3 13.Bf3 Be3 14.h4 Rd2 15.Bc6 Kf6 16.Rf3 Bd4 17.Be4 Bf2 18.Kg2 Bc5+ 19.Kh1 Rd4 20.Bd3 Ra4 21.Rf1 Be3 22.Kg2 Ra2+ 23.Kf3 Bb6 24.Rb1
 32/53  00:32      470,159k  15,408k  +2.15  1.Bxa7 Bxe4 2.dxe4 e5 3.bxc5 Nxc5 4.Qc3 Ne6 5.Bb6 Rd7 6.Be3 h5 7.h4 Nc8 8.Qb2 Nd4 9.Rb1 Rd8 10.c3 Ne6 11.Kg1 Qc6 12.Rc1 b5 13.Na5 Qc7 14.b4 Nd6 15.Qc2 Qd7 16.Bh3 Rc8 17.Kh2 Ra8 18.Qd1 Qc7
 32/59  00:32      470,159k  15,408k  +3.37  1.bxa4 Bxe4 2.Qxf6+ Kxf6 3.Be5+ Kg5 4.axb5 Bxg2+ 5.Kxg2 Nd5 6.bxc5 Ra2 7.Nd6 Rd7 8.Rb1 Rxc2 9.c6 Rxd6 10.cxb7 Rd8 11.b8Q Rxb8 12.Bxb8 Rc3 13.b6 Nxb6 14.Rxb6 Rxd3 15.Rb5+ Rd5 16.Rxd5+ exd5 17.Kf3 d4 18.h4+ Kf5 19.Bf4 f6 20.Bd2 h5 21.Ke2 d3+ 22.Kxd3 Ke5 23.Be3 Kd5 24.f3 Kd6 25.Bd4
!32/61  00:32      470,159k  15,408k  +5.90  1.Qxf6+ Kxf6 2.Be5+ Kg5 3.Bg7 Bxe4 4.f4+ Kh5 5.Bxe4 g5 6.Ne5 Qc6 7.g4+ Kh4 8.Bf6 h6 9.fxg5 Ng8 10.Bxd8 Qd6 11.Nxf7 Qxd8 12.Nxd8 Nc3 13.Bxb7 cxb4 14.Rf8 hxg5 15.Rxg8 Kxg4 16.Kg2 Ra2 17.h3+ Kf4 18.Rf8+ Ke3 19.Rf3+ Kd2 20.Rf2+ Kc1 21.Nxe6 Rxc2 22.Nxg5 Nb5 23.Rxc2+ Kxc2
- By MrKris (***) Date 2020-11-10 02:06
C42 Petrov Defense, Damiano Variation
Book: 1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nxe4 colors reversed, 2 draws:

[Event "G/40'+3'' Ponder=ON 8GBh Sy.6"]
[Site "R7 2700X 14th | RTX 2060"]
[Date "+ - to MOVER  2020.11.09"]
[Round "1"]
[White "Cfish-201024-Pure"]
[Black "Lc0v0.26.3_J92-330"]
[Result "1/2-1/2"]
[ECO "C42"]
[Opening "Petrov"]
[PlyCount "108"]
[Termination "adjudication"]
[TimeControl "2400+3"]
[Variation "Damiano Variation"]

1. e4 {book} e5 {book} 2. Nf3 {book} Nf6 {book} 3. Nxe5 {book} Nxe4 {book}
4. Qe2 {+0.72/41 63s} Qe7 {-0.36/21 23s} 5. Qxe4 {+0.93/40 6.1s}
d6 {-0.38/23 22s} 6. d4 {+0.67/42 47s} dxe5 {-0.39/25 2.5s}
7. dxe5 {+0.95/41 31s} Nc6 {-0.40/23 1.2s} 8. Nc3 {+0.58/41 68s}
Qxe5 {-0.40/22 0.72s} 9. Qxe5+ {+1.05/39 31s} Nxe5 {-0.41/21 5.8s}
10. Nb5 {+0.90/43 77s} Bb4+ {-0.42/25 1.5s} 11. Bd2 {+0.62/43 82s}
Bxd2+ {-0.42/21 1.6s} 12. Kxd2 {+0.59/40 42s} Kd8 {-0.41/21 50s}
13. Re1 {+0.88/42 0s <<<--same both games--<<<} Ng4 {-0.38/18 276s} 14. Bc4 {+1.16/39 130s}
Rf8 {-0.41/19 0.42s} 15. f3 {+1.20/39 23s} Nf6 {-0.44/17 4.2s}
16. a4 {+1.17/37 40s} Bd7 {-0.43/18 77s} 17. Kc1 {+0.92/41 0s}
Ne8 {-0.43/17 25s} 18. Rd1 {+0.93/40 110s} a6 {-0.42/17 86s}
19. Nc3 {+1.37/44 7.8s} Nd6 {-0.42/15 18s} 20. Rd4 {+1.25/44 52s}
Kc8 {-0.41/16 127s} 21. Rhd1 {+1.09/45 14s} Nxc4 {-0.42/17 42s}
22. Rxc4 {+1.11/43 12s} Re8 {-0.41/18 36s} 23. Nd5 {+1.18/47 206s}
Bc6 {-0.40/13 26s} 24. b3 {+1.13/41 3.3s} Re2 {-0.41/15 165s}
25. Nf4 {+1.12/47 2.1s} Re7 {-0.42/14 7.3s} 26. Nd3 {+1.28/47 154s}
a5 {-0.28/13 95s} 27. h4 {+1.06/43 9.0s} Ra6 {-0.28/16 97s}
28. Nf4 {+1.09/42 118s} f6 {-0.33/18 55s} 29. Rc5 {+1.43/41 27s}
h6 {-0.34/21 7.5s} 30. Ng6 {+1.24/41 18s} Re2 {-0.33/21 32s}
31. Kb2 {+1.20/39 24s} Be8 {-0.29/20 72s} 32. Nf4 {+0.99/42 39s}
Re5 {-0.29/29 20s} 33. Rdd5 {+0.55/43 62s} Re1 {-0.30/30 13s}
34. Rxa5 {+0.66/43 94s} Rxa5 {-0.30/31 0.32s} 35. Rxa5 {+0.58/49 33s}
b6 {-0.27/23 34s} 36. Ra8+ {+0.50/51 86s} Kb7 {-0.26/23 6.2s}
37. Rd8 {+0.50/47 26s} g5 {-0.25/22 7.1s} 38. Nd5 {+0.44/49 33s}
Bc6 {-0.22/22 84s} 39. Nb4 {+0.42/42 44s} gxh4 {-0.26/20 142s}
40. Nxc6 {+0.11/51 0.001s} Kxc6 {-0.27/22 12s} 41. Rh8 {+0.11/51 16s}
h3 {-0.26/19 41s} 42. gxh3 {+0.11/55 0s} Rf1 {-0.25/18 53s}
43. Rxh6 {+0.11/46 23s} Rxf3 {-0.25/20 0.33s} 44. h4 {+0.11/50 25s}
Kd7 {-0.25/16 54s} 45. Ka3 {+0.10/44 33s} Rf2 {-0.26/14 173s}
46. h5 {+0.10/59 0.001s} f5 {-0.21/14 79s} 47. Kb2 {+0.10/61 0s}
Rf3 {-0.20/14 30s} 48. Rf6 {+0.06/61 237s} f4 {-0.14/16 54s}
49. h6 {+0.06/63 0s} Rh3 {-0.18/15 39s} 50. Rxf4 {+0.06/65 0.001s}
Rxh6 {-0.03/7 50s} 51. b4 {+0.06/69 0s} Kc8 {-0.01/6 84s} 52. c3 {+0.06/67 15s}
Kb8 {-0.01/6 36s} 53. Rf2 {+0.06/74 42s} Rh3 {-0.01/6 23s}
54. Rd2 {+0.06/245 99s} Ka8 {-0.01/6 21s, Draw by adjudication} 1/2-1/2 Colors reversed was the same moves through 13.Re1: [Event "G/40'+3'' Ponder=ON 8GBh Sy.6"]
[Site "R7 2700X 14th | RTX 2060"]
[Date "+ - to MOVER  2020.11.09"]
[Round "2"]
[White "Lc0v0.26.3_J92-330"]
[Black "Cfish-201024-Pure"]
[Result "1/2-1/2"]
[ECO "C42"]
[Opening "Petrov"]
[PlyCount "89"]
[Termination "adjudication"]
[TimeControl "2400+3"]
[Variation "Damiano Variation"]
[FEN "r1bk3r/ppp2ppp/8/1N2n3/8/8/PPPK1PPP/4RB1R b - - 2 13"]

13... Nd7 {-0.79/41 167s} 14. Bc4 {+0.44/23 107s}
Rf8 {-0.90/38 34s} 15. Kc1 {+0.43/17 97s} a6 {-0.65/42 0s}
16. Nd4 {+0.38/19 177s} Nb6 {-0.65/43 0s} 17. Bd3 {+0.43/14 77s}
Bd7 {-0.44/41 27s} 18. Bxh7 {+0.37/20 87s} g6 {-0.72/47 29s}
19. Nf3 {+0.34/29 11s} Bc6 {-1.05/47 86s} 20. Ng5 {+0.31/28 0.62s}
Bxg2 {-0.93/47 43s} 21. Rhg1 {+0.29/29 0.63s} Bc6 {-0.94/47 33s}
22. Rg4 {+0.29/22 1.1s} Bd7 {-1.17/49 62s} 23. Rd4 {+0.27/27 99s}
c5 {-0.24/40 36s} 24. Rd6 {+0.27/28 30s} Kc7 {-0.14/42 9.9s}
25. Rf6 {+0.27/27 11s} Nd5 {-0.12/46 26s} 26. Rxf7 {+0.26/26 15s}
Rxf7 {-0.12/49 33s} 27. Nxf7 {+0.26/24 8.8s} Bf5 {-0.07/50 45s}
28. h4 {+0.26/22 10s} Rf8 {-0.06/50 31s} 29. Nh6 {+0.26/21 14s}
Rh8 {-0.06/54 23s} 30. Nxf5 {+0.25/20 41s} Rxh7 {-0.06/54 0s}
31. Re5 {+0.25/18 39s} gxf5 {-0.06/44 2.5s} 32. Rxd5 {+0.24/17 17s}
Kc6 {-0.06/54 21s} 33. Rxf5 {+0.24/14 39s} Rxh4 {-0.06/56 3.0s}
34. Rf6+ {+0.24/13 223s} Kc7 {-0.06/61 0.001s} 35. Kd2 {+0.21/12 397s}
a5 {-0.03/41 62s} 36. Re6 {+0.21/9 0.54s} b5 {0.00/44 38s} 37. a3 {+0.19/11 62s}
Rd4+ {0.00/57 35s} 38. Ke1 {+0.17/12 81s} Rh4 {0.00/59 0s}
39. Ke2 {+0.17/10 58s} Rc4 {0.00/64 45s} 40. Kd1 {+0.16/10 51s}
Rd4+ {0.00/65 231s} 41. Ke1 {+0.17/11 30s} Rh4 {0.00/65 0.48s}
42. Kd1 {+0.17/10 59s} Rd4+ {0.00/61 36s} 43. Ke2 {+0.14/11 30s}
Rc4 {0.00/62 28s} 44. Kd2 {+0.11/11 42s} Rd4+ {0.00/60 39s}
45. Ke3 {+0.10/12 39s, Draw by adjudication} 1/2-1/2
- By MrKris (***) Date 2020-11-10 08:59
B48 Sicilian Defense, Paulsen Variation
Book through 14.f4 - leads to white 3 minors vs. black queen + 2 pawns !? !?
In all 4 games, 2 TCEC and 2 here, black sacrificed the exchange !? !? !?

TCEC SuFi Bonus 3 :
      Lc0 J92-330 1/2-1/2 StockfishClassical  https://tcec-chess.com/#div=sfb3&game=33&season=19
StockfishClassical  1-0  Lc0 J92-330  https://tcec-chess.com/#div=sfb3&game=34&season=19
Here :
Lc0 1/2-1/2 Cfish ,  Cfish 1-0 Lc0


[Event "G/40'+3'' Ponder=ON 8GBh Sy.6"]
[Site "R7 2700X 14th | RTX 2060"]
[Date "+ - to MOVER, 2020.11.09"]
[Round "1"]
[White "Lc0v0.26.3_J92-330"]
[Black "Cfish-201024-Pure"]
[Result "1/2-1/2"]
[ECO "B32"]
[Opening "Sicilian defense"]
[PlyCount "298"]
[Termination "adjudication"]
[TimeControl "2400+3"]

1. e4 {book} c5 {book} 2. Nf3 {book} Nc6 {book} 3. d4 {book} cxd4 {book}
4. Nxd4 {book} e6 {book} 5. Nc3 {book} Qc7 {book} 6. Be3 {book} a6 {book}
7. Qd2 {book} Nf6 {book} 8. O-O-O {book} Bb4 {book} 9. f3 {book} Ne5 {book}
10. Nb3 {book} b5 {book} 11. Qe1 {book} Rb8 {book} 12. Qg3 {book} O-O {book}
13. Bd4 {book} Bd6 {book} 14. f4 {book} Nh5 {-0.98/42 90s}
15. fxe5 {+0.55/18 29s} Nxg3 {-0.75/41 30s} 16. exd6 {+0.55/22 4.3s}
Qxd6 {-0.76/40 56s} 17. hxg3 {+0.54/24 0.80s} Qxg3 {-0.93/40 68s}
18. Rh3 {+0.54/21 0.36s} Qc7 {-0.74/44 302s <<< 18...Qg5+ see human game below >>>} 19. Bc5 {+0.51/15 0.25s}
Bb7 {-1.25/38 41s} 20. Bd6 {+0.51/24 1.2s} Qb6 {-1.28/39 51s}
21. Nc5 {+0.52/20 0.72s} Bc6 {-0.81/38 44s} 22. b4 {+0.52/18 116s}
a5 {-1.25/35 45s} 23. a3 {+0.53/18 5.0s <<< 23.e5 Cfish 1-0 Lc0 below >>>} Qa7 {-1.33/40 235s}
24. Nb3 {+0.60/19 143s} axb4 {-1.68/41 72s} 25. axb4 {+0.60/15 0.34s}
Ra8 {-1.80/42 418s} 26. Bc5 {+0.64/17 0.43s} Qa3+ {-1.73/39 89s}
27. Kb1 {+0.77/15 227s} h6 {-2.00/42 15s} 28. Bxb5 {+0.72/20 195s}
Bxb5 {-0.93/35 22s} 29. Nxb5 {+0.72/22 0.29s} Qa2+ {-1.22/41 60s}
30. Kc1 {+0.76/1 0.075s} Rfb8 {-1.51/43 55s} 31. Nd6 {+0.82/17 17s}
Qa4 {-1.78/40 51s} 32. Rd4 {+1.11/18 196s} Qa3+ {-1.75/51 0s}
33. Kd2 {+1.14/18 34s} Qb2 {-1.74/50 38s} 34. Nc4 {+1.20/16 41s}
Qb1 {-1.81/53 6.8s} 35. Ne3 {+1.26/16 27s} d6 {-1.74/52 0s}
36. Bxd6 {+1.56/15 169s} Rc8 {-2.02/55 4.7s} 37. e5 {+1.54/17 56s}
Ra3 {-1.94/57 0s} 38. Nc5 {+1.44/18 66s} Qa1 {-2.00/40 57s}
39. Rd3 {+1.62/14 113s} Rxd3+ {-2.06/44 3.3s} 40. Nxd3 {+1.45/20 98s}
Qc3+ {-2.13/44 101s} 41. Ke2 {+1.79/12 96s} Ra8 {-2.33/44 0s}
42. Rh4 {+1.76/11 38s} Qc6 {-2.40/43 0s} 43. Bc5 {+1.73/10 118s}
Ra1 {-1.85/39 19s} 44. Kd2 {+1.67/10 132s} Rg1 {-1.98/41 19s}
45. Rd4 {+1.67/9 58s} Kh7 {-1.85/36 11s} 46. Rf4 {+1.63/9 20s}
Kg8 {-2.36/37 43s} 47. Rc4 {+1.56/10 63s} Qb5 {-2.07/37 40s}
48. Rd4 {+1.72/8 40s} Kh7 {-1.96/38 15s} 49. Rf4 {+1.71/8 35s}
Kg8 {-2.22/38 57s} 50. Rd4 {+1.63/9 58s} Kh7 {-2.61/41 48s}
51. Rf4 {+1.66/9 11s} Kg8 {-2.22/35 7.9s} 52. Ne1 {+1.61/9 61s}
g5 {-1.93/35 9.2s} 53. Rg4 {+1.58/9 18s} Kh7 {-1.98/38 42s}
54. Nd1 {+1.48/11 19s} Qd7+ {-1.39/34 34s} 55. Nd3 {+1.70/12 20s}
Rh1 {-1.56/39 0s} 56. Nf2 {+1.70/11 15s} Rh2 {-1.13/34 16s}
57. Ke2 {+1.68/13 12s} Kg6 {-1.38/36 62s} 58. Kf1 {+1.72/17 17s}
Qa4 {-1.02/43 0.001s} 59. Kg1 {+1.69/18 20s} Rh4 {-0.94/44 10s}
60. Rxh4 {+1.65/19 1.8s} gxh4 {-0.66/41 8.4s} 61. Ne1 {+1.67/18 3.5s}
f6 {-0.56/42 17s} 62. Nfd3 {+1.63/17 4.7s} fxe5 {-0.56/44 8.6s}
63. Nxe5+ {+1.60/16 5.0s} Kh7 {-0.56/45 7.6s} 64. Kh2 {+1.39/16 37s}
Qa3 {-0.72/51 9.9s} 65. N1f3 {+1.33/17 47s} Qc3 {-0.99/53 0s}
66. Bd4 {+1.36/20 0.30s} Qxc2 {-1.00/52 12s} 67. b5 {+1.38/19 0.42s}
Qf5 {-1.00/53 7.1s} 68. b6 {+1.30/15 13s} Qf4+ {-0.99/48 0s}
69. Kh1 {+1.47/16 9.9s} Qe4 {-1.07/55 21s} 70. Kg1 {+1.43/12 15s}
Kg8 {-1.07/53 0.001s} 71. Bf2 {+1.37/12 16s} Qc2 {-1.08/52 0.002s}
72. Be3 {+1.39/11 2.6s} Qc3 {-1.08/55 6.5s} 73. Bd4 {+1.39/13 4.6s}
Qc1+ {-1.00/54 69s} 74. Kh2 {+1.43/17 0.34s} Qf4+ {-0.91/48 2.3s}
75. Kh1 {+1.43/15 0.42s} Qe4 {-0.84/47 4.8s} 76. Kg1 {+1.48/13 0.30s}
Kf8 {-0.75/39 2.1s} 77. Bf2 {+1.52/12 11s} h3 {-0.66/45 0s}
78. gxh3 {+1.43/11 4.5s} Ke8 {-0.66/46 0s} 79. Kg2 {+1.38/10 6.0s}
h5 {-0.65/46 0s} 80. Bd4 {+1.28/10 11s} Kd8 {-0.65/44 5.9s}
81. Nf7+ {+1.22/10 3.2s} Ke7 {-0.76/45 5.2s} 82. Ng5 {+1.35/9 2.9s}
Qf4 {-0.65/43 0.20s} 83. h4 {+1.36/10 2.2s} Qf5 {-0.19/36 3.8s}
84. Kg3 {+1.38/10 1.9s} Kd7 {-0.50/42 21s} 85. Ne5+ {+1.39/12 1.9s}
Kd6 {-0.50/41 0s} 86. Nc4+ {+1.38/11 2.3s} Kc6 {-0.19/41 1.6s}
87. Nf3 {+1.35/11 1.6s} Qd5 {-0.19/41 0.17s} 88. Nce5+ {+1.36/10 8.0s}
Kb7 {-0.19/45 2.0s} 89. Kf4 {+1.34/10 0.89s} Qd8 {-0.19/49 1.6s}
90. Ke4 {+1.27/9 5.6s} Qc8 {-0.18/43 2.5s} 91. Kd3 {+1.18/10 6.3s}
Qc1 {-0.18/45 0.002s} 92. Ke2 {+1.14/9 1.6s} Qf4 {-0.17/48 6.4s}
93. Kf1 {+1.03/9 5.0s} Qe4 {-0.16/43 2.4s} 94. Kg2 {+0.90/8 3.7s}
Ka6 {-0.15/44 2.4s} 95. Kf1 {+0.89/8 3.1s} Qc2 {-0.15/45 5.1s}
96. Ke1 {+0.87/9 2.6s} Qe4+ {-0.14/43 4.7s} 97. Kd2 {+0.81/9 3.1s}
Kb7 {-0.08/45 4.3s} 98. Be3 {+0.73/10 1.9s} Qb4+ {-0.08/45 2.0s}
99. Kd3 {+0.73/11 4.9s} Qb1+ {-0.08/45 2.1s} 100. Ke2 {+0.70/11 1.7s}
Qe4 {-0.08/45 3.6s} 101. Kf2 {+0.69/10 0.27s} Qb1 {-0.08/46 2.7s}
102. Kg2 {+0.72/8 5.7s} Qf5 {-0.08/47 2.6s} 103. Kg3 {+0.68/8 4.5s}
Ka6 {-0.08/49 0.001s} 104. Bc5 {+0.66/8 3.1s} Kb7 {-0.08/51 2.8s}
105. Be3 {+0.65/8 2.8s} Qe4 {-0.08/51 2.5s} 106. Bg1 {+0.61/9 3.2s}
Qf5 {-0.08/54 6.7s} 107. Bd4 {+0.58/9 2.8s} Ka6 {-0.08/50 4.7s}
108. Kg2 {+0.57/8 2.8s} Qe4 {-0.08/48 0s} 109. Kh2 {+0.56/7 3.1s}
Qb1 {-0.08/49 3.0s} 110. Kh3 {+0.54/8 2.8s} Kb7 {-0.08/43 2.7s}
111. Kg2 {+0.53/8 3.3s} Qf5 {-0.08/51 2.3s} 112. Kf1 {+0.51/8 3.2s}
Qc2 {-0.08/50 6.2s} 113. Ke1 {+0.45/9 2.0s} Ka6 {-0.07/43 7.5s}
114. Nd2 {+0.51/8 2.3s} Qa4 {-0.07/46 1.5s} 115. Nec4 {+0.52/9 2.4s}
Qd7 {-0.07/44 1.2s} 116. Bf6 {+0.45/8 5.3s} Qd5 {0.00/47 2.6s}
117. Kd1 {+0.42/9 2.8s} e5 {0.00/46 1.9s} 118. Bg5 {+0.42/10 3.1s}
e4 {0.00/54 0s} 119. Ke2 {+0.32/10 3.2s} Qd3+ {0.00/44 2.8s}
120. Kf2 {+0.25/10 2.1s} Qd5 {0.00/53 1.9s} 121. Ke1 {+0.29/9 3.7s}
Qd3 {0.00/53 0.002s} 122. Kf2 {+0.30/10 2.2s} Qd4+ {0.00/72 2.8s}
123. Ke1 {+0.28/10 3.9s} Qd3 {0.00/55 2.8s} 124. Kd1 {+0.24/10 1.2s}
Kb7 {0.00/47 3.8s} 125. Kc1 {+0.39/10 3.2s} Qc3+ {0.00/56 4.0s}
126. Kb1 {+0.35/10 1.9s} Kc6 {0.00/44 4.0s} 127. Be3 {+0.41/9 4.0s}
Kd7 {0.00/50 0.002s} 128. Ka2 {+0.36/10 4.6s} Kc6 {0.00/55 2.8s}
129. Kb1 {+0.36/10 0.85s} Kd5 {0.00/53 2.0s} 130. Bf4 {+0.36/10 5.1s}
Ke6 {0.00/51 4.0s} 131. Ka2 {+0.43/9 2.1s} Qb4 {0.00/53 4.6s}
132. Be3 {+0.39/14 0.34s} Kd5 {0.00/47 3.4s} 133. Nb2 {+0.38/13 5.2s}
Qc3 {0.00/46 3.5s} 134. Ndc4 {+0.37/12 0.32s} Kc6 {0.00/47 2.5s}
135. Bh6 {+0.36/12 6.3s} Qf6 {0.00/49 2.8s} 136. Bg5 {+0.33/11 3.1s}
Qc3 {0.00/48 0s} 137. Be3 {+0.31/11 3.8s} Qe1 {0.00/48 2.8s}
138. Kb3 {+0.66/11 1.3s} Qxh4 {0.00/46 2.9s} 139. Ka4 {+0.27/14 0.91s}
Qh2 {0.00/49 2.0s} 140. Na5+ {+0.16/14 1.4s} Kd7 {0.00/54 2.2s}
141. Nbc4 {+0.13/15 0.28s} h4 {0.00/58 3.2s} 142. Kb5 {+0.07/12 8.9s}
h3 {0.00/54 3.1s} 143. Bd4 {+0.03/13 4.7s} e3 {0.00/49 3.6s}
144. Be5 {+0.42/13 1.9s} Qg1 {0.00/48 3.0s} 145. b7 {+0.33/18 0.52s}
Qg8 {0.00/48 18s} 146. Nxe3 {+0.08/9 3.6s} h2 {0.00/68 0s}
147. Bxh2 {+0.05/7 1.9s} Qg5+ {0.00/79 2.2s} 148. Kb4 {+0.04/5 4.4s}
Qe7+ {0.00/94 0s} 149. Ka4 {+0.03/5 4.5s}
Qh4+ {0.00/111 2.9s, Draw by adjudication} 1/2-1/2

Moves 41 to 72 had no captures or pawn moves but white finally got an idea. [Event "G/40'+3'' Ponder=ON 8GBh Sy.6"]
[Site "R7 2700X 14th | RTX 2060"]
[Date "+ - to MOVER, 2020.11.09"]
[Round "2"]
[White "Cfish-201024-Pure"]
[Black "Lc0v0.26.3_J92-330"]
[Result "1-0"]
[BlackElo "2400"]
[ECO "B48"]
[Opening "Sicilian"]
[Variation "Taimanov, 6.Be3 a6 7.Qd2"]
[WhiteElo "2400"]
[TimeControl "2400+3"]
[Termination "normal"]
[PlyCount "242"]
[WhiteType "human"]
[BlackType "human"]
[FEN "1r3rk1/3p1ppp/1qbBp3/ppN5/1P2P3/2N4R/P1P3P1/2KR1B2 w - - 0 23"]

{Lc0 1/2-1/2 Cfish 23.a3} 23. e5 {+1.10/42 0 37s} f6 {-0.68/20 0 436s}

(23. .. axb4 {??} 24. Bd3 f5 (24.
.. g6 25. N3e4) 25. exf6 bxc3 {??} 26. f7+ {Mate in 9} Kxf7 (26. .. Rxf7
27. Bxh7+ {Mate in 7} Kh8 28. Bg6+ Kg8 29. Rdh1 Rf1+ 30. Rxf1 Bf3 31. Rfh1
Bh5 32. Rxh5 b4 33. Rh8#) 27. Rf1+ Kg8 28. Bxh7+ Kh8 29. Bg6+ Kg8 30. Rfh1
Rf1+ 31. Rxf1 Bf3 32. Rfh1 Bh5 33. Rxh5 Qxd6 34. Rh8#)

24. exf6 {+1.01/49 0 68s} Rxf6 {-0.70/33 0 0.71s}
25. N3e4 {+1.58/39 0 35s} Rf5 {-0.70/24 0 211s} 26. bxa5 {+1.46/46 0 3.5s}
Qa7 {-0.70/20 0 0.21s} 27. Bd3 {+1.80/43 0 37s} h6 {-0.64/22 0 112s} 28. g4
{+1.36/45 0 3.6s} Rd5 {-0.57/22 0 41s} 29. Bxb8 {+1.90/45 0 38s} Qxb8
{-0.62/24 0 61s} 30. Rf1 {+1.16/51 0 48s} Qe5 {-0.60/27 0 35s} 31. Nb3
{+1.72/51 0 74s} Qc7 {-0.59/27 0 16s} 32. Kd2 {+1.06/52 0 114s} Re5
{-0.65/29 0 0.41s} 33. Re3 {+1.37/49 0 36s} Qd8 {-0.64/14 0 0.30s} 34. Re2
{+1.26/51 0 39s} Qh4 {-0.66/28 0 38s} 35. Rf4 {+1.15/51 0 6.7s} h5
{-0.66/27 0 42s} 36. Nd4 {+1.36/52 0 2.7s} Bxe4 {-0.68/27 0 426s} 37. Rexe4
{+0.98/55 0 56s} Rxe4 {-0.68/26 0 0.49s} 38. Rxe4 {+0.98/57 0 34s} Qd8
{-0.66/25 0 0.29s} 39. gxh5 {+0.98/60 0 48s} Qxa5+ {-0.67/22 0 0.34s} 40.
Kc1 {+0.98/58 0 135s} Qxa2 {-0.67/23 0 0.35s} 41. Nb3 {+0.98/58 0 67s} Qa8
{-0.68/14 0 0.33s} 42. Re5 {+0.98/59 0 26s} b4 {-0.56/13 0 160s} 43. Kb2
{+0.98/64 0 0.002s} Kf8 {-0.58/15 0 123s} 44. Rc5 {+0.98/61 0 0.001s} Ke7
{-0.48/13 0 106s} 45. Rb5 {+0.98/58 0 100s} Qf3 {-0.47/14 0 23s} 46. Bg6
{+0.98/61 0 0s} Qf6+ {-0.41/12 0 89s} 47. Ka2 {+0.98/63 0 192s} Qf4
{-0.40/12 0 0.34s} 48. Rb7 {+0.89/62 0 284s} Kd8 {-0.40/11 0 0.35s} 49. Bd3
{+0.89/57 0 14s} Qe5 {-0.38/11 0 140s} 50. Bg6 {+0.81/47 0 12s} Qf4
{-0.39/10 0 64s} 51. Rb6 {+0.89/50 0 16s} Kc7 {-0.38/10 0 73s} 52. Ra6
{+0.81/49 0 13s} Qe3 {-0.37/9 0 32s} 53. Ra4 {+0.81/56 0 0s} Qb6 {-0.35/9 0
17s} 54. Bd3 {+0.73/51 0 17s} Kd8 {-0.36/9 0 24s} 55. Ra5 {+0.73/51 0 0s}
Qc6 {-0.35/8 0 35s} 56. Rb5 {+0.81/51 0 55s} Qh1 {-0.37/9 0 26s} 57. Bg6
{+0.81/53 0 28s} Qe1 {-0.39/10 0 14s} 58. Rb7 {+0.81/50 0 12s} Qc3 {-0.36/9
0 16s} 59. Rb8+ {+0.98/50 0 23s} Kc7 {-0.36/10 0 9.0s} 60. Rb5 {+0.98/58 0
18s} Kd8 {-0.38/11 0 13s} 61. Kb1 {+0.81/54 0 23s} Qg3 {-0.36/10 0 13s} 62.
Nc1 {+0.81/49 0 13s} Qe1 {-0.35/10 0 2.5s} 63. Rb8+ {+0.81/50 0 11s} Kc7
{-0.36/9 0 17s} 64. Rf8 {+0.81/55 0 0s} Qe3 {-0.35/9 0 14s} 65. Rf1
{+0.73/50 0 15s} Qe5 {-0.36/9 0 16s} 66. Rf2 {+0.73/50 0 5.5s} Kd8 {-0.37/8
0 9.7s} 67. Rf8+ {+0.73/50 0 9.0s} Kc7 {-0.32/8 0 5.9s} 68. Rf2 {+0.74/52 0
5.9s} Kd8 {-0.37/9 0 8.2s} 69. Re2 {+0.65/47 0 0.79s} Qb8 {-0.37/9 0 12s}
70. Nd3 {+0.65/47 0 29s} Qb5 {-0.33/8 0 5.3s} 71. Rf2 {+1.05/43 0 8.3s} Qb6
{-0.49/13 0 1.3s} 72. Rf4 {+1.26/39 0 8.7s} b3 {-0.54/16 0 0.47s} 73. c3
{+1.14/45 0 15s} Qa7 {-0.52/15 0 0.63s} 74. Rf8+ {+1.69/36 0 8.0s} Kc7
{-0.55/16 0 0.61s} 75. Nb4 {+1.59/40 0 8.8s} Qe3 {-0.54/15 0 1.5s} 76. Kb2
{+1.50/41 0 8.3s} Qe2+ {-0.53/15 0 7.2s} 77. Kxb3 {+1.45/43 0 1.1s} Qd1+
{-0.52/13 0 0.36s} 78. Kb2 {+1.49/43 0 11s} Qe2+ {-0.51/13 0 11s} 79. Nc2
{+1.50/48 0 8.2s} Qb5+ {-0.51/14 0 7.7s} 80. Nb4 {+1.49/49 0 0s} Qe2+
{-0.51/14 0 3.8s} 81. Kb3 {+1.50/48 0 22s} Qd1+ {-0.54/12 0 0.36s} 82. Nc2
{+1.51/45 0 4.8s} Qd5+ {-0.55/13 0 0.33s} 83. c4 {+1.45/42 0 6.4s} Qd1
{-0.57/11 0 14s} 84. Rf4 {+1.51/44 0 6.1s} Qd6 {-0.57/11 0 0.40s} 85. Rf3
{+1.57/48 0 5.7s} Kb6 {-0.58/10 0 8.7s} 86. Rd3 {+1.57/44 0 6.7s} Qb8
{-0.56/9 0 0.29s} 87. Kc3 {+1.57/45 0 5.0s} Qe5+ {-0.56/10 0 2.8s} 88. Kb3
{+1.57/48 0 8.7s} Qb8 {-0.53/10 0 4.3s} 89. Ka3 {+1.57/46 0 2.5s} Qc7
{-0.57/9 0 8.7s} 90. Kb4 {+1.57/50 0 4.2s} Qc5+ {-0.56/9 0 1.1s} 91. Kb3
{+1.71/42 0 4.4s} Qc8 {-0.59/10 0 0.59s} 92. Nd4 {+1.79/42 0 5.6s} Qb8
{-0.65/10 0 0.94s} 93. Nf3 {+1.79/44 0 4.1s} Kc7+ {-0.70/9 0 4.6s} 94. Kc2
{+2.10/36 0 6.3s} Qa8 {-0.79/9 0 9.1s} 95. Nd4 {+2.18/41 0 4.6s} Qa2+
{-0.84/9 0 0.39s} 96. Kc3 {+2.26/39 0 3.3s} Qa5+ {-0.86/10 0 2.5s} 97. Kb3
{+2.26/40 0 9.7s} Kb7 {-0.87/10 0 6.3s} 98. Nc2 {+3.06/44 0 15s} Kc6
{-0.58/9 0 1.4s} 99. Be4+ {+3.06/36 0 0s} Kc7 {-1.37/9 0 2.3s} 100. c5
{+4.32/29 0 2.0s} Qb5+ {-1.37/11 0 2.4s} 101. Nb4 {+5.29/29 0 0.002s} Kc8
{-1.33/10 0 1.3s} 102. Rd2 {+5.62/27 0 0.66s} Qf1 {-1.31/9 0 4.3s} 103. Bg6
{+7.05/29 0 4.7s} Qg1 {-1.45/11 0 6.0s} 104. Rd3 {+7.57/27 0 2.3s} Qc1
{-1.52/10 0 0.26s} 105. Na6 {+7.95/28 0 2.4s} Qa1 {-1.80/10 0 6.8s} 106.
Rd6 {+9.62/28 0 4.4s} Qe1 {-2.01/10 0 2.9s} 107. Ka4 {+9.78/26 0 2.3s} Qa1+
{-2.13/10 0 0.70s} 108. Kb5 {+10.48/28 0 3.3s} Qb2+ {-2.22/11 0 0.60s} 109.
Nb4 {+10.98/27 0 3.0s} Qe2+ {-2.43/11 0 1.3s} 110. Bd3 {+11.66/29 0 2.4s}
Qb2 {-2.62/9 0 6.3s} 111. Bc2 {+12.61/31 0 0s} Qe5 {-3.89/9 0 6.3s} 112.
Ba4 {+16.60/26 0 5.0s} Qc3 {-4.47/9 0 0.81s} 113. Na6 {+17.34/23 0 2.4s}
Qa3 {-4.41/8 0 3.9s} 114. Ka5 {+18.50/23 0 2.3s} e5 {-4.80/9 0 1.5s} 115.
Rxd7 {+21.14/26 0 0.91s} e4 {-5.26/9 0 1.8s} 116. c6 {+49.88/26 0 1.4s} e3
{-4.09/11 0 4.2s} 117. Rc7+ {+152.53/35 0 0.001s} Kd8 {-3.75/11 0 0.005s}
118. Rb7 {+152.56/44 0 3.7s} Qc3+ {-6.79/10 0 4.4s} 119. Kb6 {+152.57/49 0
0.83s} Qd4+ {-10.22/10 0 6.8s} 120. Nc5 {+152.58/47 0 0s} e2 {-9.12/9 0
3.0s} 121. c7+ {+M21/61 0 2.5s} Ke7 {-13.46/9 0 0.41s, White wins by
adjudication} 1-0

ChessTempo.com, through 14.f4 book: 18 games, FIDE 1934-2709, wh+7 =9 bk+2.
TCEC Lc0 1/2-1/2 SfClass was the same except 20...h6 !?: Event "OEsterreichische Meisterschaften"]
[Site "St. Veit - Kunsthotel Fuchspal"]
[Round "2"]
[Date "2016.3.20"]
[White "Hofer, Emilian 2241"]
[Black "Khalakhan, Jurij 2244"]
[WhiteElo "2241"]
[BlackElo "2244"]
[Result "0-1"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Qd2 Nf6 8.O-O-O Bb4 9.f3 Ne5
10.Nb3 b5 11.Qe1 Rb8 12.Qg3 O-O 13.Bd4 Bd6 14.f4 Nh5 15.fxe5 Nxg3 16.exd6 Qxd6 17.hxg3 Qxg3
18.Rh3 Qg5+ {<<< Both above had 18...Qc7 >>>} 19.Be3 Qg6 20.e5 f5 21.exf6 Rxf6 22.Bd3 Qxg2 23.Rxh7 Qg3 24.Bd2 d5 25.Ne2 Qc7
26.Bg5 Qf7 27.Bxf6 Qxf6 28.Rdh1 e5 29.Nc3 Qg5+ 30.Kb1 e4 31.Be2 Qe5 32.Rh8+ Kf7 33.Rf1+ Kg6
34.Rg1+ Kf6 35.Rf1+ Kg6 36.Rff8 b4 37.Nd1 Qe6 38.Nd4 Qb6 39.Nf5 Bxf5 40.Rxb8 Qg1 41.b3 d4
42.Rb6+ Kg5 43.Rh5+ Kf4 44.Rd6 g6 45.Rxf5+ gxf5 46.Kc1 Ke5 47.Rd7 Qg5+ 48.Kb2 Qd2 49.Bh5 f4 50.Kb1 f3 51.Re7+ Kf5  0-1
Up Topic The Rybka Lounge / Test Positions / But what about correspondence chess?

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