Not logged inRybka Chess Community Forum
Up Topic The Rybka Lounge / Test Positions / Due both monsters failed to convert Czech Benoni properly.
- - By Lazy Frank (****) Date 2021-02-03 14:24 Edited 2021-02-03 15:13 Upvotes 1
Source:


[Event "TCEC Season 20 - Superfinal"]
[Site "tcec-chess.com"]
[Date "2021.02.01"]
[Round "99.1"]
[White "Stockfish 20210113"]
[Black "LCZero 0.27.0d-Tilps-dje-magic_JH.94-100"]
[Result "1-0"]
[BlackElo "3586"]
[ECO "A44"]
[Opening "Old Benoni"]
[Variation "Czech, 3.e4 d6 4.Bd3"]
[WhiteElo "3601"]
[TimeControl "7200+10"]
[Termination "normal"]
[PlyCount "135"]
[WhiteType "engine"]
[BlackType "engine"]

1. d4 {B} c5 {B} 2. d5 {B} e5 {B} 3. e4 Nf6 4. Nd2 Be7 5. Bd3 O-O 6. Ne2 d6
7. a4 Ne8 8. h3 {D} Nd7 9. g4 Nb6 10. a5 Nd7 11. Ng3 Bg5 12. Nc4 Bf4 13. b3
Rb8 14. Nf5 Bxc1 15. Qxc1 Ndf6 16. Ng3 h6 17. Ne3 b5 18. Qd2 Kh7 19. Be2
Rh8 20. h4 Kg8 21. f3 Nd7 22. O-O-O Nf8 23. Rdf1 Rb7 24. Ng2 a6 25. Kb1 b4
26. h5 Qxa5 27. Ne3 Qd8 28. Kb2 Ra7 29. Nc4 Nd7 30. Ra1 Kh7 31. Na5 Qf6 32.
Bd3 Rf8 33. Rhg1 Nb6 34. Nc6 Rc7 35. Be2 Bb7 {?} 36. Nf5 Bxc6 37. g5 hxg5
38. dxc6 Rxc6 39. Rxg5 c4 40. Bxc4 Rxc4 41. Qg2 d5 42. Rg6 Rc6 43. Rxf6
Rxf6 44. Qd2 Nd6 45. Nxd6 Rxd6 46. Rg1 a5 47. Qg5 Rg8 48. Qxe5 Rf6 49. exd5
a4 50. h6 axb3 51. Rxg7+ Rxg7 52. Qxf6 Rg6 53. Qxf7+ Kxh6 54. Kxb3 Kg5 55.
Kxb4 Rf6 56. Qg7+ Kf5 57. Qg4+ Ke5 58. Kc5 Nd7+ 59. Qxd7 Ra6 60. Qc7+ Kf6
61. d6 Ra3 62. Qe7+ Kf5 63. d7 Ra5+ 64. Kb4 Ra1 65. Qe4+ Kf6 66. d8=Q+ Kg7
67. Qde7+ Kh6 68. Q4h7# 1-0



[Event "TCEC Season 20 - Superfinal"]
[Site "tcec-chess.com"]
[Date "2021.02.01"]
[Round "100.1"]
[White "LCZero 0.27.0d-Tilps-dje-magic_JH.94-100"]
[Black "Stockfish 20210113"]
[Result "1-0"]
[BlackElo "3601"]
[ECO "A44"]
[Opening "Old Benoni"]
[Variation "Czech, 3.c4 d6 4.e4 Be7"]
[WhiteElo "3586"]
[TimeControl "7200+10"]
[Termination "normal"]
[PlyCount "159"]
[WhiteType "engine"]
[BlackType "engine"]

1. d4 {B} c5 {B} 2. d5 {B} e5 {B} 3. Nd2 Nf6 4. e4 Be7 5. Bd3 O-O 6. a4 d6
7. Ne2 Ne8 8. O-O {D} Bg5 9. Nc4 Bxc1 10. Qxc1 b6 11. Nc3 a6 12. Qe3 Nd7
13. Rab1 Rb8 14. b4 cxb4 15. Rxb4 a5 16. Rbb1 f6 17. f3 Ba6 18. Nxe5 fxe5
19. Bxa6 Nc7 20. Bd3 Nc5 21. Ra1 Kh8 22. Rfb1 Ne8 23. Nd1 g5 {?} 24. Bb5
Rg8 25. Bxe8 Qxe8 26. h3 Nxa4 27. Qd2 Nc5 28. Ne3 Qd8 29. Nf5 Rg6 30. g4
Nd7 31. Kg2 Nf8 32. Qe3 Rg7 33. Nxg7 Kxg7 34. Kg3 h6 35. c4 Qc7 36. Ra2 Ng6
37. Rab2 h5 38. Qxg5 h4+ 39. Kh2 Qc5 40. Qd2 Nf4 41. Qf2 Qxf2+ 42. Rxf2 Nd3
43. Rd2 Nc5 44. g5 Kg6 45. Rdb2 Nd7 46. Rg1 a4 47. Rg4 Rh8 48. Ra2 Nc5 49.
Ra3 Rh5 50. Kg2 Rh8 51. Kf2 Kg7 52. Ke3 Kg6 53. Ra2 Rh5 54. Rb2 Nb3 55. f4
exf4+ 56. Kxf4 Rh8 57. e5 Rf8+ 58. Ke4 dxe5 59. d6 Rf1 60. Rxh4 Nc5+ 61.
Kd5 a3 62. Rg2 Rf8 63. Rh6+ Kg7 64. Ra2 Rf3 65. h4 e4 66. Kc6 Na6 67. h5
Rb3 68. Re6 Rf3 69. Re7+ Kg8 70. h6 Rf8 71. g6 Rc8+ 72. Kb7 Rd8 73. Rf2
Nc5+ 74. Kc7 Ra8 75. h7+ Kh8 76. Rf8+ Rxf8 77. g7+ Kxh7 78. gxf8=Q+ Kg6 79.
Rg7+ Kh6 80. Qh8# 1-0


Pivot positions:

2b1nr2/2r2ppk/pnNp1q1p/2pPp2P/1p2P1P1/1P3PN1/1KPQB3/R5R1 b - - 17 35


1r1qnr1k/6pp/1p1p4/p1nPp3/P3P3/3BQP2/2P3PP/RR1N2K1 b - - 8 23


23 ... Rg8

_____________________________________________________________________________________________________

I kinda agree with SF choice 8. h3, but disagree with continuation 9. g4 (creates backward f-pawn before black determined king defender pawns formation).

So ...

1. d4 c5 2. d5 e5 3. e4 Nf6 4. Nd2 Be7 5. Bd3 O-O 6. Ne2 d6 7. a4 Ne8 8. h3 Nd7

Chess Cloud Database Query Interface and Leela as best move here expects Nc3, SF played g4.

I propose b3.

r1bqnrk1/pp1nbppp/3p4/2pPp3/P3P3/1P1B3P/2PNNPP1/R1BQK2R b KQ - 0 9


Advantages of b3:

1) keeps both knights flexible (Nc4-Nf1 and Nc3-Ng3)
2) protects c4
3) makes possible Bb2 and in some cases Kb2
4) makes possible a1 rook lift to king side via Ra2
Parent - - By MrKris (***) Date 2021-02-04 08:19
Conditions in the game headers (evaluations relative to the mover).

          1.d4 c5 2.d5 e5 - ChessTempo.com 2400+ 418 games white 65%:  W 49% | =32% | B 19%

Compare to TCEC 20 SuFi rd. 99.1:
TCEC  8.h3 1.73  Nd7 0.70
Here  8.h3 1.64  Na6 0.78 [Event "Old Benoni - G/26'+2'' Sy.6 8GBh"]
[Site "R7 2700X 14ths | RTX 2060 Ponder=ON"]
[Date "2021.02.03"]
[Round "1.1"]
[White "Stockfish_21013116c0"]
[Black "Lc0v0.26.3_T60-67506"]
[Result "1-0"]
[ECO "A44"]
[Opening "Old Benoni"]
[Variation "Czech, 3.e4"]
[TimeControl "1560+2"]
[Termination "adjudication"]
[PlyCount "104"]
[WhiteType "human"]
[BlackType "human"]

1. d4 {book} c5 {book} 2. d5 {book} e5 {book} 3. e4 {+1.41/40 0 91s} Nf6
{-0.70/9 0 28s} 4. Nd2 {+1.40/39 0 31s} Be7 {-0.73/10 0 32s} 5. Bd3
{+1.42/39 0 16s} O-O {-0.74/10 0 35s} 6. a4 {+1.51/39 0 2.8s} d6 {-0.77/10
0 22s} 7. Ne2 {+1.67/36 0 4.2s} Ne8 {-0.77/10 0 16s} 8. h3 {+1.64/35 0
3.7s <--< same position as TCEC 99.1 <--<} Na6 {-0.78/9 0 65s}
( {TCEC 99.1} 8...Nd7 9.g4 {--see LF's post above--} )
9. O-O {+1.59/36 0 27s} Bg5 {-0.80/12 0 22s} 10.
f4 {+1.83/34 0 40s} exf4 {-0.87/18 0 0.82s} 11. Nxf4 {+1.65/35 0 21s} Nb8
{-0.72/12 0 38s} 12. e5 {+2.21/35 0 16s} Bxf4 {-0.37/17 0 36s} 13. Rxf4
{+0.83/46 0 207s} dxe5 {-0.43/25 0 0.26s} 14. Rf2 {+1.01/40 0 38s} f5
{-0.41/25 0 0.34s} 15. Qe1 {+0.97/41 0 57s} Qe7 {-0.39/23 0 0.41s} 16. Nc4
{+1.02/39 0 27s} e4 {-0.39/18 0 0.38s} 17. Bf4 {+1.07/39 0 25s} h6
{-0.36/19 0 143s} 18. Rd1 {+0.99/34 0 19s} g5 {-0.39/25 0 7.8s} 19. Bc1
{+1.20/33 0 13s} Nf6 {-0.38/25 0 22s} 20. Be2 {+1.18/34 0 8.0s} f4
{-0.40/28 0 23s} 21. b4 {+1.31/36 0 16s} Nbd7 {-0.40/24 0 0.85s} 22. Bb2
{+1.09/34 0 50s} Qe8 {-0.58/18 0 149s} 23. Nd6 {+0.94/40 0 22s} Qg6
{-0.59/20 0 0.26s} 24. g4 {+1.83/34 0 54s} b6 {-0.90/16 0 78s} 25. Nf5
{+2.63/36 0 7.0s} Kh7 {-0.95/16 0 14s} 26. Ne7 {+3.48/32 0 22s} Qg7
{-1.08/18 0 46s} 27. d6 {+4.08/33 0 0.34s} Bb7 {-1.15/17 0 13s} 28. Rh2
{+4.55/34 0 20s} cxb4 {-1.25/16 0 5.9s} 29. h4 {+4.94/36 0 22s} f3
{-2.04/15 0 65s} 30. Bc4 {+5.50/39 0 0.002s} Nc5 {-2.31/15 0 32s} 31. Nf5
{+5.74/38 0 4.3s} Qg6 {-2.52/17 0 21s} 32. Nxh6 {+6.02/44 0 103s} e3
{-2.85/13 0 0.26s} 33. Qxe3 {+6.09/38 0 25s} Qe4 {-2.87/17 0 1.2s} 34. Bd4
{+6.10/37 0 16s} f2+ {-3.24/14 0 97s} 35. Qxf2 {+6.84/35 0 17s} Nd5
{-3.24/16 0 19s} 36. Qe1 {+7.17/37 0 2.7s} Qxe1+ {-3.22/17 0 41s} 37. Rxe1
{+7.98/38 0 16s} Kxh6 {-3.21/17 0 12s} 38. Re5 {+8.55/37 0 13s} gxh4
{-3.57/17 0 5.7s} 39. Rxh4+ {+8.79/34 0 9.8s} Kg6 {-4.02/15 0 9.2s} 40.
Rhh5 {+8.94/36 0 11s} Rg8 {-4.42/15 0 17s} 41. Reg5+ {+9.66/35 0 0.99s} Kf7
{-1.15/1 0 0.001s} 42. Rh7+ {+10.10/36 0 17s} Ke6 {-4.88/16 0 100s} 43. Be5
{+11.47/40 0 0.001s} Rge8 {-5.37/16 0 22s} 44. Rh6+ {+11.82/33 0 0s} Kd7
{-6.14/8 0 0.21s} 45. Bb5+ {+11.90/32 0 17s} Bc6 {-6.55/13 0 38s} 46. Rg7+
{+12.22/35 0 0s} Ne7 {-6.76/11 0 24s} 47. dxe7 {+12.40/34 0 0s} Bxb5
{-7.53/12 0 46s} 48. Rd6+ {+13.13/33 0 13s} Kc8 {-8.59/10 0 32s} 49. axb5
{+13.45/33 0 0s} a5 {-8.68/9 0 89s} 50. g5 {+14.52/30 0 19s} a4 {-8.90/9 0
28s} 51. g6 {+27.13/35 0 84s} a3 {-10.08/10 0 19s} 52. Rf7 {+M35/41 0 16s}
a2 {-9.77/8 0 12s, White wins by adjudication} 1-0

Compare to TCEC 20 SuFi rd. 100.1: TCEC 3.Nd2 0.71 ; here 3.Nc3 0.74. [Event "Old Benoni - G/26'+2'' Sy.6 8GBh"]
[Site "R7 2700X 14ths | RTX 2060 Ponder=ON"]
[Date "2021.02.03"]
[Round "1.2"]
[White "Lc0v0.26.3_T60-67506"]
[Black "Stockfish_21013116c0"]
[Result "1-0"]
[ECO "A44"]
[Opening "Old Benoni"]
[Variation "Czech, 3.e4 d6 4.Nc3 Be7 5.Nf3"]
[TimeControl "1560+2"]
[Termination "adjudication"]
[PlyCount "122"]
[WhiteType "human"]
[BlackType "human"]

1. d4 {book} c5 {book} 2. d5 {book} e5 {book} 3. Nc3 {+0.74/10 0 30s}
( {TCEC Lc0} 3.Nd2 {0.71})
3...d6 {-1.32/42 0 111s} 4. e4 {+0.72/11 0 23s} Be7 {-1.38/39 0 13s} 5. Nf3
{+0.71/11 0 29s} Nf6 {-1.38/39 0 0s} 6. Bd3 {+0.74/11 0 29s} O-O {-1.43/36
0 58s} 7. Nd2 {+0.76/10 0 4.9s} Ne8 {-1.39/35 0 18s} 8. O-O {+0.78/12 0
14s} Nd7 {-1.30/42 0 78s} 9. a4 {+0.73/12 0 14s} a5 {-1.24/37 0 4.3s} 10.
Nc4 {+0.72/14 0 43s} Nb6 {-1.48/39 0 6.4s} 11. Nxb6 {+0.73/14 0 29s} Qxb6
{-1.21/37 0 2.7s} 12. Nb5 {+0.74/14 0 78s} Qd8 {-1.32/43 0 21s} 13. Na3
{+0.74/16 0 0.85s} f5 {-1.19/40 0 22s} 14. exf5 {+0.76/17 0 4.1s} Bxf5
{-1.07/40 0 21s} 15. Bxf5 {+0.76/16 0 31s} Rxf5 {-1.15/41 0 35s} 16. Qd3
{+0.79/17 0 79s} Rf7 {-1.24/41 0 2.4s} 17. f4 {+0.77/16 0 8.8s} Nf6
{-1.43/40 0 39s} 18. Nc4 {+0.77/16 0 24s} e4 {-1.17/39 0 14s} 19. Qd1
{+0.79/14 0 0.69s} h6 {-1.02/38 0 46s} 20. g4 {+0.80/15 0 96s} Qe8
{-0.93/41 0 24s} 21. Kg2 {+0.81/18 0 1.6s} b5 {-1.08/41 0 34s} 22. axb5
{+0.80/19 0 54s} Qxb5 {-1.32/44 0 21s} 23. b3 {+0.79/18 0 14s} Qb7
{-1.37/41 0 33s} 24. Ne3 {+0.74/20 0 1.3s} c4 {-0.86/39 0 44s} 25. bxc4
{+0.71/24 0 1.1s} Nd7 {-0.83/36 0 25s} 26. Qe2 {+0.71/23 0 102s} Qc7
{-1.46/40 0 0.001s} 27. Bb2 {+0.92/17 0 55s} Nb6 {-1.36/39 0 81s} 28. Bd4
{+0.93/19 0 2.0s} Bf6 {-1.51/36 0 24s} 29. c3 {+1.00/17 0 6.8s} Rc8
{-1.06/35 0 25s} 30. Bxb6 {+1.12/17 0 44s} Qxb6 {-1.20/38 0 1.9s} 31. Nf5
{+1.15/17 0 21s} Re8 {-1.12/36 0 4.6s} 32. Qc2 {+1.20/16 0 40s} e3
{-1.09/38 0 7.3s} 33. Rfe1 {+1.33/13 0 60s} Bd8 {-1.41/38 0 30s} 34. Kg3
{+1.21/16 0 62s} Kh8 {-1.73/41 0 208s} 35. Rab1 {+1.30/17 0 10s} Qc7
{-2.69/38 0 24s} 36. Qa4 {+1.42/19 0 73s} Ref8 {-2.35/40 0 37s} 37. Qc6
{+1.45/22 0 0.28s} Qa7 {-3.02/38 0 38s} 38. Qxd6 {+1.48/26 0 0.23s} a4
{-2.36/32 0 14s} 39. Qe6 {+1.54/20 0 17s} a3 {-3.40/38 0 75s} 40. Qxe3
{+1.54/19 0 2.7s} Qd7 {-3.06/33 0 24s} 41. Rf1 {+1.95/13 0 82s} Rf6
{-3.27/36 0 14s} 42. h3 {+2.04/13 0 25s} Ra6 {-3.33/33 0 23s} 43. Rf2
{+2.39/11 0 77s} Rg6 {-3.73/34 0 86s} 44. Nd4 {+3.53/10 0 38s} Bb6
{-4.34/34 0 6.2s} 45. Qd3 {+3.54/11 0 57s} Rgf6 {-3.99/29 0 8.2s} 46. Kg2
{+3.62/12 0 0.32s} Qd6 {-5.26/35 0 115s} 47. f5 {+3.84/10 0 5.9s} Rb8
{-5.22/30 0 0s} 48. Nb5 {+5.22/9 0 35s} Qf8 {-4.62/31 0 9.2s} 49. Re2
{+5.23/9 0 22s} Bc5 {-5.38/34 0 18s} 50. Rbe1 {+5.32/9 0 17s} Rfb6
{-5.37/32 0 0s} 51. h4 {+5.55/8 0 49s} Qf6 {-6.48/32 0 33s} 52. Kh3
{+5.30/9 0 1.7s} Rd8 {-7.06/35 0 21s} 53. Re8+ {+6.16/11 0 16s} Rxe8
{-7.48/35 0 1.4s} 54. Rxe8+ {+7.13/11 0 12s} Kh7 {-7.81/34 0 0s} 55. d6
{+8.46/10 0 9.4s} Bxd6 {-7.74/33 0 0.001s} 56. Re6 {+10.37/10 0 15s} a2
{-7.74/32 0 5.9s} 57. Rxf6 {+13.97/9 0 15s} gxf6 {-8.51/33 0 6.2s} 58. Qd1
{+13.66/8 0 20s} Ra6 {-8.79/29 0 6.7s} 59. Qa1 {+13.39/8 0 1.5s} Bc5
{-8.88/32 0 12s} 60. Nd4 {+19.67/7 0 26s} Ra8 {-9.04/30 0 15s} 61. Nc2
{+23.36/6 0 10s} Ra6 {-9.02/27 0 21s, White wins by adjudication} 1-0
Parent - - By Lazy Frank (****) Date 2021-02-04 10:56
Can you check with your modest :smile: hardware where games fares in line?:

1. d4 c5 2. d5 e5 3. e4 Nf6 4. Nd2 Be7 5. Bd3 O-O 6. Ne2 d6 7. a4 Ne8 8. h3 Nd7 9. b3

Here black have two reasonable moves: g6 and Bg5.
My eventual mainline is: 9... Bg5 10. Nc4 Bxc1 11. Qxc1
Parent - By MrKris (***) Date 2021-02-05 06:12
9...g6 10.g4 b6: Sf 1-0 Lc ; 10.g4 Bg5 Lc 1/2-1/2 Sf
[Event "G/26'+2'' 8GBh Sy.6 , OldBen.LFg6Bg5"]
[Site "R7 2700X 14ths | RTX 2060 Ponder=ON"]
[Date "2021.02.04"]
[Round "1"]
[White "Stockfish_21013116c0"]
[Black "Lc0v0.26.3_67506"]
[Result "1-0"]
[ECO "A44"]
[Opening "Old Benoni"]
[Variation "Czech, 3.e4"]
[TimeControl "1560+2"]
[Termination "adjudication"]
[PlyCount "68"]
[WhiteType "human"]
[BlackType "human"]

1. d4 {book} c5 {book} 2. d5 {book} e5 {book} 3. e4 {book} Nf6 {book} 4.
Nd2 {book} Be7 {book} 5. Bd3 {book} O-O {book} 6. Ne2 {book} d6 {book} 7.
a4 {book} Ne8 {book} 8. h3 {book} Nd7 {book} 9. b3 {book} g6 {book} 10. g4
{+1.78/36 0 69s} b6 {-0.81/8 0 25s <<difference<<} 11. Nf3 {+1.84/37 0 90s} Ng7 {-0.79/9 0
32s} 12. Qd2 {+2.16/33 0 21s} Nf6 {-0.87/12 0 34s} 13. Qh6 {+2.05/36 0 29s}
Re8 {-0.88/12 0 3.5s} 14. Bg5 {+2.50/40 0 31s} a6 {-1.03/13 0 36s} 15. Ng3
{+2.41/37 0 28s} Ra7 {-1.05/15 0 41s} 16. Bxf6 {+3.10/37 0 28s} Bxf6
{-1.16/20 0 44s} 17. h4 {+3.52/41 0 0.003s} Bxg4 {-1.22/20 0 29s} 18. Ng5
{+3.87/38 0 8.2s} Nh5 {-1.23/22 0 9.7s} 19. Nxh5 {+3.81/39 0 31s} Bxh5
{-1.97/17 0 54s} 20. Be2 {+3.98/43 0 16s} Bxe2 {-2.51/17 0 68s} 21. Qxh7+
{+4.25/45 0 20s} Kf8 {-2.67/1 0 0.085s} 22. Kxe2 {+4.50/39 0 30s} Rc7
{-2.64/17 0 16s} 23. Rag1 {+4.66/45 0 9.6s} c4 {-2.77/16 0 83s} 24. b4
{+4.77/47 0 25s} c3 {-3.11/16 0 86s} 25. Rg3 {+6.52/36 0 26s} Qd7 {-2.59/15
0 32s} 26. b5 {+7.48/36 0 2.0s} Bxg5 {-3.05/13 0 39s} 27. Rxg5 {+8.09/34 0
3.1s} Ke7 {-3.53/13 0 32s} 28. Rxg6 {+8.55/34 0 7.4s} axb5 {-4.22/12 0 58s}
29. Rhg1 {+9.32/35 0 25s} Kd8 {-4.37/13 0 46s} 30. Rg8 {+11.05/38 0 99s} b4
{-5.89/14 0 24s} 31. Rxe8+ {+11.80/34 0 1.1s} Qxe8 {-7.38/13 0 26s} 32. Rg8
{+13.33/36 0 9.4s} b3 {-7.95/12 0 24s} 33. cxb3 {+14.06/33 0 2.7s} c2
{-9.92/13 0 40s} 34. Rxe8+ {+15.56/34 0 0s} Kxe8 {-12.61/15 0 29s, White
wins by adjudication} 1-0


[Event "G/26'+2'' 8GBh Sy.6 , OldBen.LFg6Bg5"]
[Site "R7 2700X 14ths | RTX 2060 Ponder=ON"]
[Date "2021.02.04"]
[Round "1.2"]
[White "Lc0v0.26.3_67506"]
[Black "Stockfish_21013116c0"]
[Result "1/2-1/2"]
[ECO "A44"]
[Opening "Old Benoni"]
[Variation "Czech, 3.e4"]
[TimeControl "1560+2"]
[Termination "adjudication"]
[PlyCount "154"]
[WhiteType "human"]
[BlackType "human"]

1. d4 {book} c5 {book} 2. d5 {book} e5 {book} 3. e4 {book} Nf6 {book} 4.
Nd2 {book} Be7 {book} 5. Bd3 {book} O-O {book} 6. Ne2 {book} d6 {book} 7.
a4 {book} Ne8 {book} 8. h3 {book} Nd7 {book} 9. b3 {book} g6 {book} 10. g4
{+0.87/9 0 18s} Bg5 {-1.69/39 0 180s <<difference<<} 11. Nc4 {+0.95/11 0 25s} Bxc1
{-1.63/38 0 28s} 12. Qxc1 {+0.97/12 0 20s} Qh4 {-1.64/40 0 54s} 13. Ne3
{+1.00/11 0 37s} a6 {-1.73/40 0 37s} 14. Ng2 {+1.01/12 0 57s} Qf6 {-1.64/43
0 123s} 15. Qh6 {+1.21/12 0 33s} Rb8 {-1.87/41 0 49s} 16. a5 {+1.16/13 0
21s} b5 {-1.46/39 0 57s} 17. axb6 {+1.11/13 0 2.4s} c4 {-1.45/39 0 12s} 18.
Bxc4 {+1.36/16 0 59s} Nxb6 {-1.41/42 0 0.001s} 19. O-O {+1.39/16 0 22s}
Nxc4 {-1.47/43 0 4.3s} 20. bxc4 {+1.29/17 0 13s} Rb4 {-1.29/40 0 6.5s} 21.
Ne3 {+0.95/20 0 55s} Qf3 {-1.16/43 0 15s} 22. Ng3 {+0.96/20 0 13s} f6
{-1.18/42 0 10s} 23. Ng2 {+0.96/20 0 33s} Rxc4 {-1.19/44 0 0s} 24. Qe3
{+0.98/19 0 19s} Qxe3 {-1.29/43 0 24s} 25. Nxe3 {+0.96/19 0 5.0s} Rc5
{-1.21/42 0 16s} 26. Rfb1 {+0.95/17 0 61s} Rf7 {-1.31/44 0 0s} 27. Rb8
{+0.90/18 0 90s} Ra7 {-1.18/42 0 23s} 28. Ngf1 {+0.89/17 0 13s} Bd7
{-1.07/42 0 23s} 29. Nd2 {+0.86/19 0 4.7s} Rb5 {-1.25/45 0 32s} 30. Rxb5
{+0.86/18 0 11s} Bxb5 {-1.14/44 0 8.9s} 31. Nb3 {+0.85/17 0 57s} Rc7
{-1.25/44 0 26s} 32. f3 {+0.85/16 0 63s} h5 {-1.12/42 0 42s} 33. Kf2
{+0.83/16 0 7.2s} hxg4 {-1.16/47 0 46s} 34. hxg4 {+0.82/15 0 66s} Rc3
{-0.95/48 0 21s} 35. Nd2 {+0.91/14 0 88s} Kg7 {-1.25/50 0 0s} 36. Nb1
{+0.85/13 0 74s} Rc7 {-1.26/50 0 0.001s} 37. Na3 {+0.83/14 0 32s} Ba4
{-1.28/50 0 0.74s} 38. Rc1 {+0.80/15 0 79s} Rc3 {-1.21/48 0 37s} 39. Nb1
{+0.84/13 0 59s} Rc7 {-1.35/46 0 2.7s} 40. Nd2 {+0.84/14 0 4.7s} Kf8
{-1.00/46 0 17s} 41. Ke2 {+0.82/14 0 67s} Rc3 {-1.17/41 0 24s} 42. Nb1
{+0.78/15 0 8.0s} Bb5+ {-1.01/42 0 14s} 43. Kd2 {+0.78/18 0 15s} Rc7
{-1.05/41 0 20s} 44. c4 {+0.77/16 0 15s} Bd7 {-1.05/38 0 12s} 45. Nc3
{+0.77/17 0 3.3s} Rb7 {-1.21/43 0 27s} 46. Kc2 {+0.77/15 0 55s} Rb4
{-1.08/46 0 124s} 47. Ra1 {+0.79/19 0 0.34s} Nc7 {-0.97/38 0 11s} 48. Kd3
{+0.81/16 0 0.55s} Kg7 {-1.05/42 0 20s} 49. Ncd1 {+0.80/14 0 126s} Rb7
{-1.15/47 0 24s} 50. Nf2 {+0.85/12 0 20s} Ra7 {-0.77/35 0 18s} 51. Rb1
{+0.88/14 0 17s} a5 {-0.58/36 0 14s} 52. Rb6 {+0.85/16 0 10s} Ne8 {-0.63/39
0 10s} 53. Nc2 {+0.83/16 0 12s} Kh6 {-0.52/44 0 46s} 54. Ke3 {+0.85/15 0
30s} a4 {-0.47/44 0 21s} 55. Na3 {+0.80/14 0 11s} Kg5 {-0.45/43 0 0.48s}
56. Rb8 {+0.76/15 0 31s} Rc7 {-0.51/47 0 0s} 57. Nd3 {+0.75/10 0 0.22s} Rc8
{-0.45/42 0 22s} 58. Rb7 {+0.65/15 0 26s} Rc7 {-0.59/48 0 0.001s} 59. Rb8
{+0.69/13 0 9.1s} Rc8 {-0.46/50 0 33s} 60. Rb2 {+0.63/15 0 11s} Rc7
{-0.47/44 0 17s} 61. Rb1 {+0.59/16 0 9.9s} Ra7 {-0.43/46 0 40s} 62. Rb6
{+0.68/11 0 6.0s} Rc7 {-0.42/45 0 9.8s} 63. Rb2 {+0.65/13 0 6.3s} Ra7
{-0.46/47 0 12s} 64. Rb6 {+0.66/12 0 7.1s} Rc7 {-0.41/46 0 23s} 65. Rb1
{+0.57/14 0 4.3s} Ra7 {-0.39/47 0 14s} 66. Rb2 {+0.62/12 0 3.9s} Rc7
{-0.38/50 0 12s} 67. Rb4 {+0.59/18 0 0.24s} f5 {-0.08/39 0 18s} 68. gxf5
{+0.52/16 0 0.28s} gxf5 {-0.10/42 0 11s} 69. Rb6 {+0.45/16 0 0.33s} fxe4
{0.0040 14s} 70. fxe4 {+0.35/17 0 0.39s} Bg4 {0.0043 9.1s} 71. c5 {+0.20/17
0 18s} Rh7 {0.0048 0s} 72. Nc4 {+0.19/16 0 2.0s} a3 {0.0048 14s} 73. Ra6
{+0.17/17 0 0.35s} Rh3+ {0.0046 7.1s} 74. Kd2 {+0.15/16 0 0.31s} dxc5
{0.0052 9.8s} 75. Ncxe5 {+0.14/14 0 0.35s} Nf6 {0.0051 11s} 76. Nf2
{+0.14/12 0 13s} Rb3 {0.0055 0s} 77. Nf7+ {+0.14/14 0 1.7s} Kh4 {0.0059
13s, Draw by adjudication} 1/2-1/2


9...Bg5 10.Nc4 Nb6 Sf 1-0 Lc ; 10.g4 Lc 1-0 Sf
[Event "G/26'+2'' 8GBh Sy.6 , OldBen.LFg6Bg5"]
[Site "R7 2700X 14ths | RTX 2060 Ponder=ON"]
[Date "2021.02.04"]
[Round "2.1"]
[White "Stockfish_21013116c0"]
[Black "Lc0v0.26.3_67506"]
[Result "1-0"]
[ECO "A44"]
[Opening "Old Benoni"]
[Variation "Czech, 3.e4"]
[TimeControl "1560+2"]
[Termination "adjudication"]
[PlyCount "148"]
[WhiteType "human"]
[BlackType "human"]

1. d4 {book} c5 {book} 2. d5 {book} e5 {book} 3. e4 {book} Nf6 {book} 4.
Nd2 {book} Be7 {book} 5. Bd3 {book} O-O {book} 6. Ne2 {book} d6 {book} 7.
a4 {book} Ne8 {book} 8. h3 {book} Nd7 {book} 9. b3 {book} Bg5 {book} 10.
Nc4 {+1.48/42 0 252s <<difference<<} Nb6 {-0.68/10 0 20s} 11. Ne3 {+1.53/41 0 63s} Bd7
{-0.71/12 0 0.64s} 12. g4 {+1.68/36 0 14s} Nc8 {-0.60/13 0 44s} 13. Ng3
{+1.22/39 0 36s} Ne7 {-0.62/14 0 17s} 14. h4 {+1.28/41 0 19s} Bf4 {-0.64/14
0 8.7s} 15. Nh5 {+1.32/41 0 16s} Ng6 {-0.65/13 0 62s} 16. Nf5 {+1.11/43 0
30s} Bxc1 {-0.70/13 0 24s} 17. Qxc1 {+1.48/37 0 20s} Kh8 {-0.70/13 0 37s}
18. Qg5 {+1.25/43 0 135s} Qa5+ {-0.71/15 0 1.2s} 19. Kd1 {+1.18/42 0 112s}
Qc3 {-0.69/12 0 131s} 20. Rb1 {+1.50/33 0 15s} Qa5 {-0.66/14 0 19s} 21. f3
{+1.41/41 0 27s} Rg8 {-0.69/14 0 27s} 22. Qd2 {+1.49/40 0 103s} Qd8
{-0.69/10 0 0.42s} 23. Ra1 {+1.51/38 0 12s} Ne7 {-0.69/17 0 2.0s} 24. Ne3
{+1.42/34 0 11s} b6 {-0.69/15 0 21s} 25. Ng3 {+1.33/41 0 98s} a6 {-0.70/13
0 64s} 26. Ke2 {+1.30/45 0 0.001s} b5 {-0.64/11 0 104s} 27. Kf2 {+1.18/45 0
0s} Rf8 {-0.63/11 0 30s} 28. Ra3 {+1.16/42 0 14s} Nf6 {-0.62/12 0 106s} 29.
Rha1 {+1.59/38 0 28s} b4 {-0.63/13 0 1.1s} 30. R3a2 {+1.70/37 0 18s} Ng6
{-0.62/13 0 46s} 31. Ng2 {+1.42/42 0 0s} Qb6 {-0.61/13 0 26s} 32. Bc4
{+1.40/39 0 0.001s} Qd8 {-0.61/12 0 27s} 33. Bd3 {+1.39/42 0 65s} Qb6
{-0.60/12 0 55s} 34. Bc4 {+1.48/42 0 0.001s} Qd8 {-0.60/12 0 32s} 35. Rh1
{+1.53/36 0 17s} h5 {-0.44/18 0 45s} 36. Nxh5 {+1.59/40 0 13s} Nxh5
{-0.46/17 0 33s} 37. gxh5 {+1.24/40 0 2.9s} Ne7 {-0.44/16 0 15s} 38. h6
{+1.23/45 0 0.001s} g6 {-0.41/15 0 25s} 39. h5 {+1.28/48 0 0s} Ng8
{-0.32/17 0 63s} 40. h7 {+2.02/36 0 17s} Nf6 {-0.30/13 0 39s} 41. Qh6
{+1.81/41 0 3.6s} g5 {-0.43/18 0 38s} 42. Raa1 {+2.28/40 0 0.001s} Bc8
{-0.53/18 0 18s} 43. Rag1 {+2.48/38 0 2.1s} Nxh7 {-0.59/20 0 26s} 44. Nh4
{+1.58/42 0 15s} Re8 {-0.71/23 0 40s} 45. f4 {+2.59/39 0 20s} exf4
{-0.79/28 0 44s} 46. e5 {+3.92/39 0 9.9s} dxe5 {-1.30/29 0 38s} 47. Ng6+
{+5.21/42 0 4.2s} Kg8 {-1.39/29 0 0.92s} 48. d6 {+5.35/39 0 13s} Qf6
{-1.52/28 0 9.7s} 49. Bxf7+ {+5.86/43 0 56s} Kxf7 {-1.82/29 0 0.59s} 50.
Qxh7+ {+6.09/36 0 8.0s} Qg7 {-1.85/28 0 0.83s} 51. Qxg7+ {+6.17/39 0 19s}
Kxg7 {-1.98/27 0 2.9s} 52. Rxg5 {+6.26/37 0 9.5s} Kf6 {-2.01/25 0 4.0s} 53.
Rhg1 {+6.29/37 0 7.8s} Bf5 {-2.08/24 0 16s} 54. Nh4 {+6.43/38 0 10s} Bxc2
{-2.25/23 0 3.3s} 55. Rg6+ {+6.60/36 0 8.7s} Bxg6 {-2.76/22 0 187s} 56.
Rxg6+ {+7.65/41 0 0.001s} Kf7 {-2.82/1 0 0.002s} 57. Nf3 {+7.63/32 0 11s}
Rg8 {-2.93/20 0 29s} 58. Nxe5+ {+7.94/35 0 0s} Kf8 {-3.06/19 0 0.23s} 59.
Nd7+ {+8.00/34 0 12s} Kf7 {-3.46/9 0 0.39s} 60. Rf6+ {+8.19/36 0 40s} Ke8
{-3.68/16 0 22s} 61. Nxc5 {+8.51/33 0 19s} Rd8 {-3.86/15 0 0.43s} 62. d7+
{+8.99/30 0 12s} Ke7 {-4.38/14 0 0.41s} 63. Re6+ {+9.25/30 0 11s} Kf7
{-4.87/12 0 0.35s} 64. Rxa6 {+9.44/29 0 9.2s} Rg3 {-5.01/10 0 0.42s} 65. a5
{+9.62/29 0 8.9s} Rc3 {-5.96/11 0 20s} 66. Rc6 {+10.20/32 0 0.002s} Ke7
{-5.89/10 0 12s} 67. Re6+ {+10.32/33 0 0.002s} Kf7 {-6.46/11 0 6.5s} 68.
Re5 {+10.59/29 0 7.5s} f3 {-6.09/10 0 6.1s} 69. a6 {+11.48/31 0 16s} Rg8
{-5.85/10 0 3.9s} 70. Nb7 {+15.08/27 0 10.0s} Rg2+ {-8.62/9 0 8.8s} 71. Kf1
{+24.17/30 0 11s} Rc1+ {-8.87/11 0 2.9s} 72. Re1 {+26.25/22 0 0.56s} Rcc2
{-7.54/11 0 1.5s} 73. Nd6+ {+M27/89 0 9.0s} Kg7 {-10.62/12 0 0.45s} 74.
Nf5+ {+M25/94 0 7.9s} Kf7 {-9.86/11 0 4.7s, White wins by adjudication} 1-0


[Event "G/26'+2'' 8GBh Sy.6 , OldBen.LFg6Bg5"]
[Site "R7 2700X 14ths | RTX 2060 Ponder=ON"]
[Date "2021.02.04"]
[Round "2.2"]
[White "Lc0v0.26.3_67506"]
[Black "Stockfish_21013116c0"]
[Result "1-0"]
[ECO "A44"]
[Opening "Old Benoni"]
[Variation "Czech, 3.e4"]
[TimeControl "1560+2"]
[Termination "adjudication"]
[PlyCount "194"]
[WhiteType "human"]
[BlackType "human"]

1. d4 {book} c5 {book} 2. d5 {book} e5 {book} 3. e4 {book} Nf6 {book} 4.
Nd2 {book} Be7 {book} 5. Bd3 {book} O-O {book} 6. Ne2 {book} d6 {book} 7.
a4 {book} Ne8 {book} 8. h3 {book} Nd7 {book} 9. b3 {book} Bg5 {book} 10. g4
{+0.77/8 0 33s <<difference<<} b6 {-1.68/46 0 260s} 11. Nc4 {+0.76/13 0 0.32s} Bxc1
{-1.33/36 0 20s} 12. Qxc1 {+0.77/16 0 0.33s} Ba6 {-1.39/39 0 34s} 13. Nxe5
{+0.76/19 0 3.4s} Nxe5 {-1.31/37 0 19s} 14. Bxa6 {+0.72/20 0 6.8s} Nf3+
{-1.30/41 0 47s} 15. Kf1 {+0.88/14 0 80s} Qf6 {-1.33/41 0 11s} 16. c3
{+0.92/14 0 43s} Nc7 {-1.45/46 0 102s} 17. Bd3 {+1.07/14 0 43s} Rab8
{-1.51/43 0 15s} 18. Qf4 {+1.31/16 0 60s} Qxf4 {-1.40/44 0 56s} 19. Nxf4
{+1.32/17 0 0.72s} Nd2+ {-1.60/44 0 37s} 20. Kg2 {+1.34/15 0 1.7s} Nxb3
{-1.61/42 0 18s} 21. Ra3 {+1.38/14 0 36s} Na5 {-1.47/36 0 14s} 22. c4
{+1.40/13 0 26s} Ne8 {-1.30/39 0 42s} 23. Ne2 {+1.58/11 0 151s} Nf6
{-1.60/37 0 31s} 24. f4 {+1.53/12 0 81s} Nd7 {-1.57/41 0 8.1s} 25. h4
{+1.68/10 0 30s} f6 {-1.50/39 0 17s} 26. Ng3 {+1.72/11 0 17s} g6 {-1.38/38
0 19s} 27. Nf1 {+1.70/11 0 15s} Kg7 {-1.50/37 0 33s} 28. Ne3 {+1.72/9 0
93s} Rh8 {-1.39/41 0 0s} 29. Rf1 {+1.82/8 0 41s} Rbg8 {-1.66/43 0 84s} 30.
Rc3 {+1.84/9 0 40s} Re8 {-1.75/41 0 0.001s} 31. Kg3 {+1.86/7 0 31s} Re7
{-1.67/44 0 57s} 32. Bc2 {+1.75/8 0 45s} Ree8 {-1.70/43 0 58s} 33. Bd3
{+1.80/8 0 38s} Re7 {-1.87/45 0 86s} 34. Bc2 {+1.70/8 0 45s} Ree8 {-1.83/46
0 87s} 35. Bb1 {+1.76/8 0 30s} Rc8 {-1.74/46 0 55s} 36. Bd3 {+1.79/8 0 36s}
Rcf8 {-1.86/48 0 0.002s} 37. Rf2 {+1.66/8 0 35s} Rf7 {-1.88/43 0 24s} 38.
Rh2 {+1.61/9 0 25s} Kf8 {-1.93/45 0 59s} 39. Rh1 {+1.43/11 0 40s} Re7
{-1.96/47 0 0.001s} 40. Bc2 {+1.52/10 0 31s} Kg7 {-1.57/43 0 51s} 41. Re1
{+1.62/7 0 55s} Nb7 {-1.85/42 0 27s} 42. Rf1 {+1.69/7 0 34s} Ree8 {-1.77/48
0 12s} 43. Bd3 {+1.81/7 0 30s} Na5 {-1.85/41 0 11s 3-fold repetition} 44.
Rh1 {+1.71/7 0 24s} Re7 {-1.81/46 0 29s} 45. Rf1 {+1.62/8 0 35s 3-fold
repetition} Rf7 {-1.94/38 0 16s} 46. Bc2 {+1.54/8 0 32s} Rff8 {-1.98/38 0
28s} 47. Bd3 {+1.60/7 0 20s} Rf7 {-1.99/39 0 29s} 48. Rh1 {+1.48/8 0 31s}
Re7 {-2.02/41 0 82s} 49. Bc2 {+1.50/7 0 27s} Ree8 {-1.81/41 0 0s} 50. Rh2
{+1.57/7 0 23s} Ref8 {-2.16/39 0 25s} 51. Rf2 {+1.49/8 0 11s} Kg8 {-1.67/32
0 4.6s} 52. Bd3 {+1.50/8 0 21s} Rf7 {-2.01/32 0 10s} 53. Rh2 {+1.41/8 0
24s} Kf8 {-2.01/38 0 0s} 54. Bc2 {+1.44/8 0 16s} Nb7 {-1.77/31 0 2.9s} 55.
g5 {+1.66/10 0 9.8s} h6 {-2.18/35 0 0.001s} 56. gxh6 {+1.71/12 0 6.2s} Rxh6
{-2.13/33 0 0.001s} 57. Bd1 {+1.75/11 0 7.5s} Ke8 {-2.28/33 0 18s} 58. h5
{+2.69/10 0 22s} Rfh7 {-2.40/32 0 7.7s} 59. Bg4 {+2.74/12 0 15s} gxh5
{-2.88/35 0 0s} 60. Be6 {+2.77/10 0 7.1s} Rh8 {-2.99/34 0 1.7s} 61. Nf5
{+3.10/10 0 9.9s} h4+ {-2.65/31 0 1.9s} 62. Kg2 {+2.94/11 0 5.2s} R6h7
{-2.90/32 0 5.1s} 63. Kh3 {+3.03/12 0 2.0s} Nf8 {-3.00/32 0 3.4s} 64. Bc8
{+2.25/13 0 7.0s} Kd8 {-3.40/34 0 0s} 65. Bxb7 {+1.86/13 0 4.3s} Rxb7
{-3.48/33 0 0.003s} 66. Rg2 {+1.75/12 0 5.7s} Kc7 {-2.04/27 0 0.98s} 67.
Rg7+ {+1.68/13 0 6.9s} Nd7 {-2.38/35 0 0s} 68. Re7 {+1.77/12 0 3.0s} Rbb8
{-2.56/29 0 3.3s} 69. Re6 {+2.00/13 0 4.7s} Rbg8 {-3.43/30 0 6.5s} 70. Kh2
{+2.14/13 0 1.2s} Rg4 {-3.38/31 0 6.4s} 71. Rf3 {+2.14/13 0 0.91s} Rhg8
{-3.80/29 0 1.4s} 72. Rf2 {+2.19/14 0 1.9s} Rg3 {-3.88/28 0 0.53s} 73. Nxd6
{+2.15/12 0 4.0s} Re3 {-4.23/28 0 1.4s} 74. Nf5 {+2.21/12 0 3.4s} Re1
{-4.11/29 0 0.001s} 75. d6+ {+2.69/12 0 5.7s} Kb7 {-4.09/30 0 6.9s} 76. Rg2
{+3.22/11 0 3.3s} Rxg2+ {-4.63/25 0 0.56s} 77. Kxg2 {+4.13/11 0 5.4s} a6
{-4.96/29 0 0s} 78. Re8 {+4.04/12 0 4.0s} a5 {-5.77/29 0 2.6s} 79. Kf2
{+5.71/9 0 5.9s} Rc1 {-6.72/25 0 3.4s} 80. e5 {+5.77/11 0 2.0s} fxe5
{-4.86/29 0 0.66s} 81. fxe5 {+4.62/12 0 1.5s} h3 {-5.91/30 0 0.75s} 82. Re7
{+3.52/13 0 7.7s} Kc8 {-8.36/33 0 0s} 83. Kg3 {+3.53/10 0 0.21s} Rc3+
{-3.85/22 0 1.1s} 84. Kh2 {+3.42/13 0 0.43s} Rd3 {-4.48/30 0 1.8s} 85. Re6
{+3.81/12 0 0.88s} Kb8 {-4.62/33 0 1.1s} 86. Ne7 {+3.91/12 0 1.6s} Kb7
{-4.98/37 0 2.4s} 87. Nd5 {+4.12/12 0 1.1s} Kc6 {-5.53/37 0 3.7s} 88. Re8
{+4.63/12 0 1.6s} Nxe5 {-6.15/37 0 7.1s} 89. Rxe5 {+4.66/12 0 0.58s} Kxd6
{-6.37/27 0 0.49s} 90. Re3 {+5.39/11 0 2.5s} Rd4 {-6.57/30 0 0s} 91. Nxb6
{+5.60/10 0 7.2s} Kc7 {-6.88/32 0 0.19s} 92. Rb3 {+5.79/9 0 4.9s} Rd1
{-7.40/32 0 4.0s} 93. Kxh3 {+10.13/7 0 1.9s} Kd6 {-7.46/31 0 0s} 94. Kg3
{+12.25/6 0 3.1s} Ke5 {-7.83/32 0 6.4s} 95. Rb5 {+20.87/6 0 1.6s} Kd4
{-8.95/33 0 5.4s} 96. Rxa5 {+23.36/6 0 1.9s} Rf1 {-12.31/24 0 2.7s} 97. Ra8
{+25.64/5 0 2.6s} Ke5 {-10.63/22 0 1.2s, White wins by adjudication} 1-0
Parent - By MrKris (***) Date 2021-02-10 00:26

> My eventual mainline is:


1.d4 c5 2.d5 e5 3.e4 Nf6 4.Nd2 Be7 5.Bd3 O-O 6.Ne2 d6 7.a4 Ne8 8.h3 Nd7 9.b3 Bg5 10.Nc4 Bxc1 11.Qxc1

White +5 -0 =1 :
                               Cr Sf Lc
1 Crystal-3.1          2.5/4      01 1=   +2 -1 =1
2 Stockfish_21020821   2.0/4   10    10   +2 -2 =0
3 Lc0v0.26.3_J94-100   1.5/4   0= 01      +1 -2 =1


Both engines' evaluations jumped up after 73...Nxb6 but after the game, at 30+ secs./move, both said there was nothing better and the black was losing much earlier (evidently both where 'on their increment').
[Event "G/17'+3'' Sy.6 , OldBenLFmain"]
[Site "R7 2700X 16ths 8GBh | RTX 2060"]
[Date "2021.02.09"]
[Round "3"]
[White "Crystal-3.1"]
[Black "Stockfish_21020821"]
[Result "1-0"]
[ECO "A44"]
[Opening "Old Benoni"]
[Variation "Czech, 3.e4"]
[TimeControl "1020+3"]
[Termination "adjudication"]
[PlyCount "174"]
[WhiteType "human"]
[BlackType "human"]

1. d4 {book} c5 {book} 2. d5 {book} e5 {book} 3. e4 {book} Nf6 {book} 4.
Nd2 {book} Be7 {book} 5. Bd3 {book} O-O {book} 6. Ne2 {book} d6 {book} 7.
a4 {book} Ne8 {book} 8. h3 {book} Nd7 {book} 9. b3 {book} Bg5 {book} 10.
Nc4 {book} Bxc1 {book} 11. Qxc1 {book} b6 {-1.53/34 0 36s} 12. Qe3
{+1.51/31 0 53s} Qe7 {-1.32/33 0 16s} 13. g4 {+1.28/31 0 80s} Ba6 {-1.44/37
0 20s} 14. Nd2 {+1.31/29 0 14s} Bxd3 {-1.54/35 0 21s} 15. Qxd3 {+1.38/30 0
130s} Qh4 {-1.49/37 0 63s} 16. Qb5 {+1.25/31 0 124s} Rd8 {-1.28/32 0 10s}
17. a5 {+1.48/30 0 17s} Qe7 {-1.25/31 0 14s} 18. Ng3 {+1.35/31 0 71s} g6
{-1.28/31 0 17s} 19. axb6 {+1.43/31 0 58s} Nxb6 {-1.28/33 0 14s} 20. Qd3
{+1.46/28 0 27s} Ra8 {-1.31/35 0 30s} 21. O-O {+1.37/26 0 8.3s} Qh4
{-1.38/36 0 24s} 22. Kh2 {+1.39/28 0 15s} Nc7 {-1.26/40 0 64s} 23. Ra5
{+1.42/28 0 34s} a6 {-1.36/38 0 73s} 24. Kg2 {+1.36/27 0 26s} Kg7 {-1.46/35
0 23s} 25. Rfa1 {+1.36/27 0 46s} h6 {-1.32/36 0 15s} 26. Qf3 {+1.33/27 0
34s} Qg5 {-1.24/37 0 15s} 27. Qd3 {+1.40/27 0 32s} Qh4 {-1.21/37 0 22s} 28.
Qf3 {+1.32/27 0 34s} Qg5 {-1.28/37 0 16s} 29. Qe3 {+1.42/27 0 34s} Qh4
{-1.26/35 0 36s} 30. Qd3 {+1.49/26 0 16s 3-fold repetition} Rh8 {-1.21/39 0
40s} 31. Ndf1 {+1.53/27 0 11s} Ra7 {-1.24/35 0 9.1s} 32. Ne3 {+1.41/29 0
37s} Kh7 {-1.15/32 0 15s} 33. Qf1 {+1.26/29 0 31s} Qg5 {-1.05/34 0 11s} 34.
Qd1 {+1.40/29 0 52s} Rha8 {-1.12/38 0 11s} 35. Qd2 {+1.50/25 0 3.1s} Qh4
{-1.09/38 0 52s} 36. Rf1 {+1.08/52 0 65s} Kg8 {-1.09/43 0 7.3s} 37. Rfa1
{+1.16/29 0 2.6s} Nb5 {-1.05/35 0 13s} 38. Qd3 {+1.08/27 0 13s} Nd4
{-1.05/41 0 10.0s} 39. R1a2 {+1.10/26 0 3.5s} Qg5 {-1.14/43 0 25s} 40. Qd1
{+1.08/28 0 3.0s} Qd8 {-1.17/44 0 79s} 41. c3 {+1.10/25 0 4.0s} Nb5
{-1.09/43 0 6.1s} 42. Qc1 {+1.15/27 0 10s} Qh4 {-1.24/43 0 55s} 43. Qa1
{+1.13/23 0 2.8s} Nc7 {-1.09/47 0 5.3s} 44. Qc1 {+1.12/23 0 1.9s} Rb8
{-1.09/43 0 8.5s} 45. Ra1 {+1.11/24 0 4.8s} Rab7 {-1.17/41 0 19s} 46. R5a3
{+1.14/24 0 4.5s} Qf6 {-1.09/40 0 7.5s} 47. Nef1 {+1.17/26 0 6.2s} Kg7
{-1.09/39 0 7.8s} 48. Nd2 {+1.14/22 0 1.1s} Qg5 {-1.25/40 0 45s} 49. Qc2
{+1.14/23 0 7.2s} Qf4 {-1.17/43 0 30s} 50. Rh1 {+1.21/22 0 4.9s} Qg5
{-1.17/41 0 25s} 51. Ra2 {+1.12/23 0 6.2s} Rh8 {-1.25/42 0 4.7s} 52. Qd3
{+1.17/20 0 3.0s} Rhb8 {-1.17/38 0 6.6s} 53. Nf3 {+1.10/21 0 2.6s} Qf6
{-1.17/40 0 5.6s} 54. Nd2 {+1.14/24 0 2.6s} Ra8 {-1.17/40 0 5.9s} 55. Rha1
{+1.15/23 0 1.7s} Qg5 {-1.25/82 0 31s} 56. Qe2 {+1.07/28 0 9.9s} Rba7
{-1.16/36 0 11s} 57. Ra5 {+1.10/21 0 0.53s} Nb5 {-1.37/37 0 14s} 58. Qe1
{+1.12/23 0 2.7s} Qd8 {-1.16/33 0 9.0s} 59. Qe3 {+1.15/22 0 2.8s} Nd7
{-1.25/32 0 6.2s} 60. Ne2 {+1.11/21 0 1.8s} Qh4 {-1.34/36 0 50s} 61. Qg3
{+1.14/24 0 2.9s} Qe7 {-1.25/32 0 2.2s} 62. Nc4 {+1.18/22 0 5.1s} h5
{-1.04/32 0 5.5s} 63. Nd2 {+1.29/21 0 0.92s} Qg5 {-1.06/33 0 1.4s} 64. Nf3
{+1.29/21 0 0.95s} Qh6 {-1.04/30 0 1.6s} 65. c4 {+1.54/24 0 6.6s} Nd4
{-0.73/27 0 1.4s} 66. Nexd4 {+0.57/22 0 1.7s} cxd4 {-0.40/27 0 1.4s} 67. b4
{+0.45/25 0 6.1s} hxg4 {-0.59/28 0 2.5s} 68. hxg4 {+0.59/21 0 0.65s} Rh8
{-0.47/30 0 3.5s} 69. g5 {+0.84/23 0 3.4s} Qh5 {-0.75/32 0 2.7s} 70. R5a3
{+0.82/22 0 1.8s} Kg8 {-0.61/32 0 2.0s} 71. c5 {+0.54/24 0 1.7s} dxc5
{-0.72/32 0 2.1s} 72. b5 {+1.12/22 0 1.00s} a5 {-0.99/32 0 3.6s} 73. b6
{+0.82/23 0 1.4s} Nxb6 {-0.75/31 0 2.8s} 74. Rb3 {+2.31/24 0 8.1s} Nd7
{-3.37/37 0 17s} 75. Nxe5 {+3.36/18 0 0.80s} Qh4 {-3.71/30 0 0.90s} 76.
Nxd7 {+4.23/21 0 1.3s} Qxe4+ {-3.78/36 0 0.97s} 77. f3 {+4.20/23 0 1.5s}
Qe2+ {-4.25/36 0 9.2s} 78. Kg1 {+5.34/22 0 1.2s} Kg7 {-4.40/26 0 0.60s} 79.
Re1 {+6.62/21 0 2.3s} Rh3 {-4.81/28 0 1.8s} 80. Qe5+ {+6.33/21 0 1.6s} Qxe5
{-4.86/26 0 0.96s} 81. Nxe5 {+6.75/21 0 2.0s} Rh8 {-4.80/26 0 1.4s} 82. d6
{+7.06/23 0 1.5s} a4 {-5.01/26 0 1.5s} 83. Ra3 {+7.37/21 0 6.3s} Rh5
{-5.48/30 0 10s} 84. f4 {+8.61/20 0 1.9s} Ra8 {-6.17/24 0 5.3s} 85. d7
{+10.86/18 0 1.6s} Rah8 {-4.81/21 0 0.54s} 86. Ng4 {+13.07/22 0 2.3s} Rh1+
{-11.25/25 0 5.4s} 87. Kf2 {+13.60/21 0 3.4s} Rxe1 {-10.27/24 0 0.59s,
White wins by adjudication} 1-0

As white Lc0 won vs. Stockfish but had the only draw, vs Crystal, enclosed:
[Event "G/17'+3'' Sy.6 , OldBenLFmain"]
[Site "R7 2700X 16ths 8GBh | RTX 2060"]
[Date "2021.02.09"]
[Round "2"]
[White "Lc0v0.26.3_J94-100"]
[Black "Stockfish_21020821"]
[Result "1-0"]
[ECO "A44"]
[Opening "Old Benoni"]
[Variation "Czech, 3.e4"]
[TimeControl "1020+3"]
[Termination "adjudication"]
[PlyCount "180"]
[WhiteType "human"]
[BlackType "human"]

1. d4 {book} c5 {book} 2. d5 {book} e5 {book} 3. e4 {book} Nf6 {book} 4.
Nd2 {book} Be7 {book} 5. Bd3 {book} O-O {book} 6. Ne2 {book} d6 {book} 7.
a4 {book} Ne8 {book} 8. h3 {book} Nd7 {book} 9. b3 {book} Bg5 {book} 10.
Nc4 {book} Bxc1 {book} 11. Qxc1 {book} b6 {-1.53/34 0 29s} 12. Qd2 {+0.81/8
0 19s} g6 {-1.43/35 0 40s} 13. g4 {+0.74/10 0 22s} Ba6 {-1.10/31 0 9.7s}
14. Ne3 {+0.66/12 0 16s} Bxd3 {-1.00/33 0 18s} 15. Qxd3 {+0.62/11 0 14s}
Qh4 {-1.12/37 0 50s} 16. Ng3 {+0.59/11 0 57s} a6 {-1.09/38 0 13s}
( 16... Nc7 {Lc0 1/2-1/2 Crystal} 17. Nc4 Ne8 18. Kf1 a6 19. Kg2 Kh8 20. f3 Kg8 21.
Kh2 Qd8 22. Qd2 Qh4 23. Qe1 Rc8 24. Qe2 Ra8 25. Qd2 Ra7 26. Ne3 Rc7 27. Qe2
Ng7 28. Rhg1 Ra7 29. Nc4 Ne8 30. Qe1 Qe7 31. Qd2 Qh4 32. Qe1 Kh8 33. Qd2
Rc7 34. Ne3 Qg5 35. Qe2 Ng7 36. Rg2 Ra7 37. Nc4 Qf6 38. Qe3 Raa8 39. Ne2 b5
40. Na5 Qh4 41. Rag1 Qd8 42. Qd2 b4 43. Nc6 Qc7 44. Ng3 Nb8 45. Nxb8 Raxb8
46. Nf1 c4 47. Qf2 cxb3 48. cxb3 Rbc8 49. Nd2 Qc3 50. Re1 a5 51. Re3 Qd4
52. Nc4 Rxc4 53. bxc4 Ne8 54. g5 Qxc4 55. f4 exf4 56. Qxf4 Kg8 57. Rf2 Qc7
58. Ree2 Qd8 59. Rc2 Ng7 60. Qf6 Qd7 61. Rc6 Rd8 62. Rfc2 Ne8 63. Qf4 b3
64. Rb2 Rb8 65. Rc4 Qe7 66. Qg3 Kg7 67. Kg2 h6 68. gxh6+ Kxh6 69. Rxb3 Rxb3
70. Qxb3 Kh7 71. Qe3 Ng7 72. Kf3 Nh5 73. Ke2 Qe5 74. Qd4 Qg3 75. Rc7 Nf4+
76. Kd1 Kh6 77. Kc2 Qa3 78. Kd2 f6 79. Rc2 Ng2 80. h4 Qf3 81. Rc1 Kh5 82.
Qd3 Qf4+ 83. Kc2 Qf2+ 84. Kb3 Ne1 85. Qd1+ Nf3 86. Rc3 Kg4 87. Ka3 Kf4 88.
Qc1+ Kg4 89. Rc2 Qd4 90. Rc4 Qd3+ 91. Qc3 Qe2 92. Qc2 Qxc2 93. Rxc2 g5 94.
hxg5 fxg5 95. Rc6 Ne5 96. Kb3 Kf4 97. Rxd6 g4 98. Rh6 g3 99. Rh4+ Ke3 100.
Rh1 Kxe4 101. Rg1 Kf3 102. Rf1+ {1/2-1/2} )
17. Ng2 {+0.82/10 0 18s} Qe7 {-1.23/39 0 87s} 18. h4 {+0.91/11 0 22s} Nc7 {-1.25/36
0 12s} 19. Qd2 {+0.76/12 0 48s} b5 {-1.33/36 0 15s} 20. h5 {+0.72/12 0 15s}
c4 {-1.04/38 0 15s} 21. bxc4 {+0.70/14 0 16s} bxa4 {-1.14/44 0 155s} 22.
Qh6 {+0.74/14 0 22s} Rfb8 {-1.49/36 0 12s} 23. g5 {+0.75/14 0 17s} Ne8
{-1.44/39 0 36s} 24. Nf1 {+0.77/13 0 21s} Ra7 {-1.30/37 0 47s} 25. Nd2
{+0.78/12 0 50s} Nc5 {-1.39/34 0 9.8s} 26. Rh3 {+0.78/13 0 27s} a5
{-1.06/40 0 66s} 27. Ne3 {+0.74/14 0 37s} Rb2 {-1.36/42 0 118s} 28. Kd1
{+0.80/13 0 28s} Qf8 {-1.50/38 0 7.6s} 29. Qxf8+ {+0.81/14 0 16s} Kxf8
{-1.67/33 0 0.59s} 30. Ng4 {+0.84/12 0 47s} Kg7 {-1.44/40 0 25s} 31. Raa3
{+0.85/17 0 0.25s} Rc7 {-1.93/40 0 65s} 32. h6+ {+1.19/17 0 39s} Kg8
{-1.97/39 0 9.0s} 33. Kc1 {+1.22/23 0 42s} Rb4 {-1.51/38 0 12s} 34. f4
{+1.23/23 0 0.39s} exf4 {-1.85/38 0 16s} 35. Raf3 {+1.24/25 0 0.88s} a3
{-1.71/35 0 7.9s} 36. Rxa3 {+1.31/25 0 21s} a4 {-1.76/37 0 12s} 37. Rhf3
{+1.36/24 0 11s} f6 {-1.89/38 0 15s} 38. Rxf4 {+1.47/24 0 23s} fxg5
{-1.93/36 0 6.6s} 39. Rf1 {+1.57/24 0 14s} Rbb7 {-2.17/36 0 11s} 40. e5
{+1.59/23 0 13s} dxe5 {-2.47/37 0 18s} 41. Nxe5 {+1.66/21 0 16s} Nd6
{-2.52/36 0 5.7s} 42. Rf6 {+1.75/20 0 17s} Ne8 {-2.52/42 0 61s} 43. Rc6
{+2.44/16 0 69s} Rxc6 {-2.90/37 0 14s} 44. dxc6 {+2.52/15 0 15s} Re7
{-2.92/36 0 5.8s} 45. Ndf3 {+2.72/15 0 30s} Nd6 {-2.94/34 0 4.7s} 46. Ra1
{+2.79/15 0 19s} Nf7 {-3.01/41 0 62s} 47. Ng4 {+2.69/17 0 37s} Nxh6
{-3.18/37 0 3.1s} 48. Nxh6+ {+2.42/20 0 27s} Kg7 {-3.03/36 0 3.4s} 49. Ng4
{+2.53/18 0 12s} h5 {-3.26/35 0 10s} 50. Nf2 {+2.74/16 0 20s} Rf7 {-2.87/30
0 11s} 51. c7 {+2.89/18 0 15s} Rxc7 {-2.91/27 0 2.3s} 52. Nxg5 {+2.93/16 0
7.1s} Kf6 {-3.18/32 0 15s} 53. Nfh3 {+2.99/17 0 12s} Ke5 {-3.20/26 0 0.59s}
54. Nf3+ {+2.90/18 0 14s} Kf5 {-3.22/30 0 3.5s} 55. Kb2 {+2.92/16 0 13s}
Ne4 {-3.27/30 0 7.4s} 56. Rxa4 {+4.32/12 0 38s} Kg4 {-3.48/25 0 0.67s} 57.
Nhg1 {+5.05/12 0 18s} Kg3 {-3.55/24 0 0.60s} 58. Ra3 {+5.29/12 0 12s} Kg4
{-3.51/25 0 1.1s} 59. Nh2+ {+5.28/10 0 51s} Kg5 {-3.41/27 0 9.2s} 60. Ngf3+
{+5.79/9 0 5.0s} Kf4 {-3.63/22 0 0.77s} 61. Nh4 {+6.35/10 0 2.1s} g5
{-3.65/26 0 2.5s} 62. Ng2+ {+8.33/10 0 7.4s} Ke5 {-3.83/25 0 0.83s} 63.
Nf3+ {+11.29/9 0 5.8s} Kd6 {-3.68/24 0 0.96s} 64. Ne3 {+13.77/8 0 12s} g4
{-3.77/25 0 2.0s} 65. Nh4 {+20.95/7 0 6.9s} Rc5 {-4.37/26 0 11s} 66. Ra8
{+21.53/6 0 8.3s} Kd7 {-4.45/26 0 2.5s} 67. Rh8 {+21.67/5 0 5.6s} Rg5
{-4.70/25 0 1.2s} 68. Kb3 {+21.31/5 0 4.7s} g3 {-4.84/26 0 6.4s} 69. Kb4
{+16.31/5 0 4.3s} Nf6 {-4.94/24 0 2.0s} 70. Nhg2 {+18.20/6 0 4.1s} Re5
{-4.85/22 0 0.47s} 71. c5 {+16.65/6 0 4.2s} Ne8 {-5.71/27 0 6.5s} 72. c4
{+19.83/6 0 3.9s} Nc7 {-5.13/22 0 0.28s} 73. Rh6 {+17.50/6 0 3.0s} Ke7
{-7.00/27 0 5.9s} 74. c6 {+21.24/6 0 4.1s} Na6+ {-6.87/23 0 0.64s} 75. Kc3
{+24.05/6 0 3.5s} Re6 {-8.05/26 0 5.5s} 76. Rxh5 {+31.98/6 0 4.0s} Rxc6
{-4.71/18 0 0.25s} 77. Nf4 {+36.88/5 0 3.3s} Nc5 {-6.89/23 0 5.7s} 78. Kb4
{+28.96/5 0 3.3s} Nd7 {-9.72/24 0 3.5s} 79. Rg5 {+24.73/5 0 3.5s} Rc8
{-6.86/20 0 1.4s} 80. Rxg3 {+38.95/5 0 3.2s} Kf6 {-5.98/23 0 1.3s} 81. Kc3
{+29.78/5 0 3.3s} Ke5 {-5.89/21 0 0.47s} 82. Nfd5 {+27.97/5 0 3.1s} Rf8
{-24.85/26 0 7.8s} 83. Rg6 {+26.48/5 0 3.4s} Rf3 {-5.82/23 0 2.2s} 84. Kb4
{+28.79/5 0 3.0s} Rf8 {-5.93/22 0 1.0s} 85. Rg7 {+22.92/5 0 3.2s} Kd6
{-5.82/23 0 1.2s} 86. Rg6+ {+21.49/5 0 3.2s} Ke5 {-8.63/23 0 2.6s} 87. Kc3
{+21.69/5 0 3.1s} Ke4 {-24.14/26 0 7.9s} 88. Re6+ {+16.02/5 0 3.0s} Kf3
{-6.04/24 0 0.53s} 89. Kd4 {+25.09/5 0 2.9s} Rh8 {-13.78/24 0 5.7s} 90. Nf5
{+22.25/5 0 3.2s} Ra8 {-11.97/27 0 3.8s, White wins by adjudication} 1-0

Stockfish 1-0 Lc0 : Stockfish's evaluation had been slowly declining but Lc0 erred.
[FEN "q3r1k1/1r2P3/2Np1p2/1n1P4/1QB2pPp/1p5P/7K/4R3 w - - 1 107"]
107. Qxb3 {+1.04/33 0 1.2s} Na3 {?? <<Losing at once.<< -0.62/18 0 5.4s} (107. .. Qa3 {! <<The only move, some chance, Sf only +1.21 to white after the game at 1 min.<<} )
108. Qd3 {+5.12/27 0 1.1s} Nxc4 {-0.68/20 0 2.1s} 109. Qg6+ {+6.41/29 0 1.4s} Kh8
{-0.70/1 0 0s} 110. Qxf6+ {+7.33/29 0 2.1s} Kh7 {-0.89/20 0 5.6s} 111.
Qxh4+ {+7.91/27 0 1.4s} Kg8 {-1.84/14 0 10s} 112. Qg5+ {+8.32/27 0 1.7s}
Kh8 {-1.92/13 0 0.40s} 113. Re2 {+9.87/31 0 9.7s} Ne5 {-2.17/13 0 1.8s}
114. Nxe5 {+10.29/27 0 0.84s} dxe5 {-2.36/12 0 0.56s} 115. Qxe5+ {+11.03/25
0 1.3s} Kh7 {-2.65/11 0 9.0s} 116. Qf5+ {+14.39/28 0 8.2s} Kg7 {-2.54/10 0
2.2s} 117. Qg5+ {+15.77/26 0 2.6s} Kh7 {-3.14/10 0 3.5s} 118. d6 {+17.37/28
0 4.1s} Qb8 {-3.09/9 0 1.6s} 119. Qf6 {+23.40/28 0 7.7s} Ra7 {-3.10/9 0
4.7s} 120. g5 {+24.95/25 0 0.39s} Kg8 {-3.58/10 0 2.4s} 121. Qe6+
{+62.88/32 0 2.7s} Kg7 {-2.94/10 0 2.3s} 122. Qe5+ {+152.49/31 0 2.2s} Kg8
{-3.77/10 0 2.8s} 123. Qd5+ {+152.52/35 0 0.77s} Kg7 {-4.05/11 0 3.1s} 124.
Qd4+ {+152.54/37 0 1.0s} Kg8 {-5.94/11 0 4.6s} 125. Rb2 {+152.56/40 0 1.9s}
Qa8 {-6.43/9 0 1.4s} 126. d7 {+152.58/43 0 1.3s} Rxd7 {-9.26/8 0 2.3s} 127.
Qxd7 {+152.60/57 0 1.4s} f3 {-10.03/8 0 5.3s, White wins by adjudication}
1-0
Attachment: oldBenLFmainRR.pgn - Games (24k)
Up Topic The Rybka Lounge / Test Positions / Due both monsters failed to convert Czech Benoni properly.

Powered by mwForum 2.27.4 © 1999-2012 Markus Wichitill