book in CCRL rating list

[Uri Blass]

I found that the game that stockfish won against Dragon with black started with


d4 {book} d5 {book} 2. Bg5 {book} Nc6 {book} 3. Nc3 {book} f6 {book} 4. Bh4
{book} e5 {book}

Stockfish won this game
I do not claim that this opening is losing for white but I think that white played bad moves and I wonder if top engines cannot get better result in CCRL if CCRL test them with a different entry without an opening book when only the opponents get some opening book so there is no danger of repeating the same game.

[pgn]
[Event "CCRL 40/15"]
[Site "CCRL"]
[Date "2022.11.25"]
[Round "852.1.10"]
[White "Dragon by Komodo 3.1 64-bit 4CPU"]
[Black "Stockfish 20221120 64-bit 4CPU"]
[Result "0-1"]
[ECO "D00"]
[Opening "Levitsky attack (Queen's bishop attack)"]
[PlyCount "155"]
[WhiteElo "3526"]
[BlackElo "3553"]

1. d4 {book} d5 {book} 2. Bg5 {book} Nc6 {book} 3. Nc3 {book} f6 {book} 4. Bh4
{book} e5 {book} 5. e3 {-0.64/28 19s} exd4 {+0.41/36 26s} 6. exd4 {-0.56/28
15s} Nge7 {+0.43/36 17s} 7. f3 {-0.58/31 41s} Bf5 {+0.47/37 46s} 8. Qd2
{-0.63/30 16s} h5 {+0.50/32 7.1s} 9. a3 {-0.57/30 18s} Kf7 {+0.60/35 38s} 10.
Bf2 {-0.48/27 17s} g6 {+0.53/33 8.1s} 11. Be3 {-0.58/28 17s} h4 {+0.55/34 12s}
12. O-O-O {-0.43/29 26s} Rb8 {+0.58/34 11s} 13. Kb1 {-0.61/28 21s} b5 {+1.11/28
12s} 14. Nxb5 {-1.47/27 38s} Nc8 {+1.13/28 14s} 15. Ka1 {-1.49/30 48s} Nb6
{+1.50/31 12s} 16. Bf4 {-2.06/27 17s} Qd7 {+1.63/35 20s} 17. Bxc7 {-1.77/29
20s} Rb7 {+1.62/34 18s} 18. Bxb6 {-2.03/31 19s} Rxb6 {+2.04/34 18s} 19. Nc3
{-2.26/31 20s} Qd6 {+1.96/34 18s} 20. Bb5 {-2.30/30 24s} Bh6 {+2.05/37 14s} 21.
f4 {-2.57/29 14s} Rhb8 {+2.13/37 16s} 22. Nf3 {-2.59/28 9.1s} Rxb5 {+2.11/35
16s} 23. Nxb5 {-2.68/28 13s} Rxb5 {+2.05/35 17s} 24. Nxh4 {-2.77/30 16s} Be4
{+2.17/35 27s} 25. Qc3 {-2.99/28 7.7s} Bxf4 {+2.24/35 18s} 26. Rhf1 {-3.10/29
12s} Na5 {+2.29/40 26s} 27. Rde1 {-2.98/29 8.4s} Kg7 {+2.25/38 21s} 28. Rf2
{-3.22/29 14s} Qc7 {+2.25/38 21s} 29. a4 {-3.37/28 9.1s} Rb7 {+2.33/38 17s} 30.
Qxc7+ {-3.39/33 18s} Bxc7 {+2.31/38 23s} 31. Nf3 {-3.44/35 13s} g5 {+2.37/39
20s} 32. Rfe2 {-3.44/37 13s} Nc4 {+2.39/39 21s} 33. b3 {-3.41/37 13s} Nd6
{+2.41/41 22s} 34. Kb2 {-3.41/38 13s} Bd8 {+2.37/41 68s} 35. Nd2 {-3.41/38 11s}
f5 {+2.50/40 14s} 36. c3 {-3.44/36 21s} a5 {+2.50/35 15s} 37. g3 {-3.73/35 60s}
Rb8 {+2.53/40 18s} 38. Ka3 {-3.65/33 24s} Be7 {+2.42/39 18s} 39. Ka2 {-3.73/34
9.4s} Bf6 {+2.58/37 13s} 40. Rd1 {-3.73/35 12s} Bc2 {+2.61/43 14s} 41. Rc1
{-4.39/37 158s} Bd3 {+2.58/36 14s} 42. Re3 {-4.53/32 18s} Be4 {+2.55/41 19s}
43. Re2 {-4.49/32 16s} Kf7 {+2.64/36 17s} 44. Nxe4 {-3.86/32 19s} dxe4
{+2.94/36 20s} 45. Rf1 {-4.12/29 26s} Ke6 {+3.23/36 73s} 46. Ref2 {-5.40/28
24s} Bg7 {+3.50/29 13s} 47. Rg2 {-5.05/26 7.9s} Rf8 {+3.49/28 19s} 48. Kb1
{-5.55/24 10s} Bh6 {+3.62/30 19s} 49. h4 {-6.20/28 21s} g4 {+4.04/29 31s} 50.
Kc2 {-6.24/28 20s} Rc8 {+4.08/31 31s} 51. h5 {-6.47/29 20s} e3 {+4.23/31 18s}
52. Kd3 {-7.15/29 15s} Ne4 {+4.52/32 22s} 53. c4 {-7.22/25 6.8s} Rb8 {+4.39/28
15s} 54. Rb1 {-7.19/26 6.1s} Nf2+ {+4.66/28 18s} 55. Kc2 {-7.39/26 8.0s} Rd8
{+4.73/30 20s} 56. Re1 {-7.84/26 8.2s} Kf6 {+4.92/30 18s} 57. b4 {-7.80/27 18s}
Rxd4 {+5.08/30 17s} 58. bxa5 {-8.47/26 19s} Rxc4+ {+5.13/28 26s} 59. Kb3
{-8.95/25 7.4s} Rc5 {+5.21/30 17s} 60. a6 {-7.62/24 11s} Ra5 {+5.33/29 18s} 61.
Re2 {-8.67/26 18s} Rxa6 {+5.36/27 21s} 62. Re1 {-8.38/24 7.3s} Ra8 {+5.70/26
22s} 63. Ka3 {-9.29/24 11s} Nd3 {+5.99/26 20s} 64. Rd1 {-10.77/24 11s} Bf8+
{+6.37/26 20s} 65. Ka2 {-9.69/27 13s} Rxa4+ {+6.63/27 17s} 66. Kb1 {-11.11/24
6.6s} Rb4+ {+6.97/27 18s} 67. Ka1 {-11.73/23 6.3s} Nf2 {+7.57/24 15s} 68. Re1
{-12.21/25 15s} Bh6 {+7.82/23 14s} 69. Rf1 {-13.42/24 13s} Rd4 {+8.88/26 38s}
70. Kb2 {-13.95/24 7.9s} Rd2+ {+10.22/21 8.5s} 71. Ka3 {-15.58/25 18s} Ne4
{+10.46/22 14s} 72. Rgg1 {-16.03/23 8.6s} e2 {+10.88/23 33s} 73. Re1 {-17.03/25
26s} Kg5 {+10.88/20 6.9s} 74. Rc1 {-17.27/24 15s} Nxg3 {+11.30/20 7.4s} 75. Rg2
{-24.88/24 32s} Rd1 {+14.63/20 9.3s} 76. Rxe2 {-24.72/23 6.2s} Rd3+ {+16.01/19
5.2s} 77. Kb4 {-26.73/23 9.8s} Nxe2 {+17.27/23 4.8s} 78. Rc8 {-43.32/29 26s,
Black wins by adjudication} 0-1
[/pgn]

Stockfish could draw the same opening with white.

[pgn][Event "CCRL 40/15"]
[Site "CCRL"]
[Date "2022.11.25"]
[Round "852.1.9"]
[White "Stockfish 20221120 64-bit 4CPU"]
[Black "Dragon by Komodo 3.1 64-bit 4CPU"]
[Result "1/2-1/2"]
[ECO "D00"]
[Opening "Levitsky attack (Queen's bishop attack)"]
[PlyCount "157"]
[WhiteElo "3553"]
[BlackElo "3526"]

1. d4 {book} d5 {book} 2. Bg5 {book} Nc6 {book} 3. Nc3 {book} f6 {book} 4. Bh4
{book} e5 {book} 5. e3 {-0.48/39 27s} exd4 {+0.67/30 25s} 6. exd4 {-0.41/36
9.3s} Nge7 {+0.69/30 14s} 7. f3 {-0.37/37 15s} Bf5 {+0.62/30 33s} 8. Bf2
{-0.45/34 12s} h5 {+0.63/30 16s} 9. Bd3 {-0.50/36 11s} g6 {+0.73/32 42s} 10.
Nge2 {-0.47/41 84s} Qd7 {+0.77/30 36s} 11. O-O {-0.42/34 10s} Bh6 {+0.85/31
21s} 12. Re1 {-0.52/37 20s} Kf7 {+0.73/28 14s} 13. a3 {-0.45/33 14s} Rae8
{+0.78/30 67s} 14. Ng3 {-0.40/31 11s} Bxd3 {+0.68/30 15s} 15. Qxd3 {-0.60/38
25s} Nd8 {+0.80/31 74s} 16. h4 {-0.44/32 13s} c6 {+0.88/29 13s} 17. Nce2
{-0.54/36 15s} Reg8 {+0.83/29 11s} 18. c4 {-0.47/37 13s} g5 {+0.61/29 12s} 19.
cxd5 {-0.54/39 21s} cxd5 {+0.66/31 15s} 20. Nxh5 {-0.48/36 15s} Bf8 {+0.55/30
14s} 21. Nhg3 {-0.50/37 16s} gxh4 {+0.54/32 13s} 22. Nf1 {-0.57/37 22s} Ng6
{+0.73/32 13s} 23. f4 {-0.36/35 13s} Bd6 {+0.55/30 12s} 24. Qf3 {-0.33/35 13s}
Ne7 {+0.55/32 19s} 25. Ne3 {-0.39/34 17s} Ne6 {+0.41/33 15s} 26. Rad1 {-0.34/35
16s} Bb8 {+0.49/34 13s} 27. Rd3 {-0.23/33 15s} Rd8 {+0.41/35 24s} 28. Ng4
{-0.21/33 17s} Ng7 {+0.42/31 12s} 29. Nc3 {-0.29/32 16s} Ngf5 {+0.48/29 21s}
30. Ne3 {-0.21/34 16s} Rh6 {+0.32/29 43s} 31. a4 {-0.16/32 18s} Bc7 {+0.40/29
18s} 32. b4 {-0.11/33 25s} Rhh8 {+0.39/31 20s} 33. a5 {-0.13/36 26s} Rh7
{+0.30/27 5.8s} 34. Kh1 {-0.08/34 18s} Ng7 {+0.30/29 16s} 35. Ng4 {-0.04/37
24s} Ngf5 {+0.35/29 17s} 36. Ne3 {+0.00/39 33s} Rh6 {+0.24/28 5.1s} 37. Kg1
{+0.00/44 22s} Rg6 {+0.21/29 14s} 38. Kf1 {+0.00/46 22s} Rh6 {+0.20/28 15s} 39.
Kg1 {-0.01/39 25s} Rhh8 {+0.41/23 1.3s} 40. Re2 {+0.00/43 15s} b6 {+0.32/22
1.1s} 41. a6 {+0.00/42 15s} Bb8 {+0.26/32 49s} 42. b5 {+0.00/42 33s} Rh7
{+0.27/34 38s} 43. Re1 {+0.00/45 16s} Ng7 {+0.16/35 47s} 44. Ng4 {+0.00/45 20s}
Qf5 {+0.22/34 24s} 45. Rde3 {+0.00/44 19s} Bd6 {+0.11/31 45s} 46. Rf1 {+0.00/45
17s} Bb4 {+0.00/33 26s} 47. Na2 {+0.00/42 21s} Ba5 {+0.05/30 13s} 48. Nc3
{+0.00/43 18s} Bxc3 {+0.00/35 23s} 49. Rxc3 {+0.00/49 19s} Ne6 {+0.00/38 10s}
50. Re1 {+0.00/50 17s} Rg8 {+0.00/40 11s} 51. Ne5+ {+0.00/52 18s} fxe5
{+0.00/41 14s} 52. Rxe5 {+0.00/56 22s} Qxf4 {+0.00/42 12s} 53. Qxf4+ {+0.00/58
21s} Nxf4 {+0.00/42 9.8s} 54. Rxe7+ {+0.00/56 21s} Kxe7 {+0.00/45 12s} 55. Rc7+
{+0.00/57 17s} Ke6 {+0.00/45 10s} 56. Rxh7 {+0.00/61 18s} Rxg2+ {+0.00/47 13s}
57. Kf1 {+0.00/61 18s} h3 {+0.00/49 10s} 58. Rxa7 {+0.00/65 18s} Nd3 {+0.00/50
12s} 59. Bg1 {+0.00/66 20s} Ra2 {+0.00/49 11s} 60. Ra8 {+0.00/64 21s} Ra1+
{+0.00/50 11s} 61. Ke2 {+0.00/44 0.59s} Rxg1 {+0.00/52 13s} 62. a7 {+0.00/66
23s} Nf4+ {+0.00/53 9.1s} 63. Kf2 {+0.00/65 22s} Ra1 {+0.00/57 9.1s} 64. Re8+
{+0.00/81 20s} Kf5 {+0.00/65 9.8s} 65. a8=Q {+0.00/88 26s} Rxa8 {+0.00/68 13s}
66. Rxa8 {+0.00/92 19s} Ke4 {+0.00/66 15s} 67. Rh8 {+0.00/91 22s} Kd3 {+0.00/66
9.6s} 68. Rh6 {+0.00/92 18s} h2 {+0.00/71 17s} 69. Rxh2 {+0.00/106 18s} Kxd4
{+0.00/72 14s} 70. Rh4 {+0.00/87 17s} Ke5 {+0.00/71 12s} 71. Kf3 {+0.00/96 39s}
Ne6 {+0.00/72 10s} 72. Ke3 {+0.00/113 29s} Kd6 {+0.00/72 15s} 73. Rh6 {+0.00/93
13s} Ke5 {+0.00/72 14s} 74. Rh5+ {+0.00/87 14s} Kd6 {+0.00/73 11s} 75. Rh6
{+0.00/88 15s} Ke5 {+0.00/76 11s} 76. Rh5+ {+0.00/90 21s} Kd6 {+0.00/73 13s}
77. Rh7 {+0.00/90 23s} Nc7 {+0.00/73 14s} 78. Rh6+ {+0.00/75 1.5s} Ne6
{+0.00/74 14s} 79. Kd2 {+0.00/79 1.9s, Draw by adjudication} 1/2-1/2
[/pgn]

[Modern Times]

Stefan Pohl's IM4moves book. Several lines in that book are in fact unbalanced.

I do not like standard chess for this exact reason - all the arguments about good books, bad books etc etc. Chess960 is much better, no book so nothing to complain about in that respect.

[Ajedrecista]

Hello:

What a weird opening IMHO that nevertheless was already played at least once:

Ramil Hasangatin ½—½ Grigoriy Oparin. Russian Team Championship (2012).

[pgn][Event "Russian Team Championship"]
[Site "Sochi RUS"]
[Date "2012.04.11"]
[EventDate "2012.04.09"]
[Round "3"]
[Result "1/2-1/2"]
[White "Ramil Hasangatin"]
[Black "Grigoriy Oparin"]
[ECO "D00"]
[WhiteElo "2498"]
[BlackElo "2487"]
[PlyCount "71"]

1. d4 d5 2. Bg5 Nc6 3. Nc3 f6 4. Bh4 e5 5. e3 exd4 6. exd4
Nge7 7. Bb5 Be6 8. f3 Qd7 9. Nge2 O-O-O 10. Bf2 Nf5 11. Ba4
Nd6 12. Nb5 Kb8 13. Nxd6 Bxd6 14. Qd2 Rhe8 15. O-O-O Bf5
16. Ng3 Bg6 17. Rhe1 a6 18. Nf1 Rxe1 19. Rxe1 Re8 20. Rxe8+
Qxe8 21. Bg3 Qe6 22. Bxd6 Qxd6 23. Bxc6 Qxc6 24. b3 a5 25. Kb2
b6 26. Ne3 Qd6 27. h3 Qe6 28. Nd1 c6 29. Qe3 Qd6 30. Nc3 Kc7
31. Na4 Kb7 32. Kb1 Kc7 33. Kb2 Kb7 34. Kb1 Kc7 35. Kb2 Kb7
36. Kb1 1/2-1/2[/pgn]

(Game found thanks to Chess Tempo opening explorer).

Both engines followed some moves of this game out of the book in their two games, when both of them deviated with 7.- f3 instead of 7.- Bb5 played by Hasangatin.

Regards from Spain.

Ajedrecista.

[Modern Times]

What a weird opening IMHO that nevertheless was already played at least once:

Not as weird as UHO books.

From Stefan's readme:
IM_4mvs-files: 11172 different lines/endpositions

If you insist on playing standard computer chess instead of chess960, then IM4moves is a really good choice imho.

- Short book meaning the engines do most of the work - really important imho
- A large number of unique openings, good for big gauntlets etc
- Some unusual and slightly unbalanced openings which gives more variety

This one and his SuperGM 4moves book are used a lot on CCRL blitz for example.
SuperGM_4mvs-files: 2668 different lines/endpositions

[RubiChess]

... if CCRL test them with a different entry without an opening book when only the opponents get some opening book

What does that mean? Please explain.

Regards, Andreas

[Uri Blass]

... if CCRL test them with a different entry without an opening book when only the opponents get some opening book

What does that mean? Please explain.

Regards, Andreas

It means that for example you add entry like Dragon3.1(no opening book) when this entry calculate from move 1 when the opponents use the normal book lines that they have in ccrl games

Dragon no book-Stockfish may start
1.e4(0.xx/40) e5(book) in one game and
1.e4(0.xx/40) c6(book) in another game

[Eelco de Groot]

Hello:

What a weird opening IMHO that nevertheless was already played at least once:

Ramil Hasangatin ½—½ Grigoriy Oparin. Russian Team Championship (2012).

[pgn][Event "Russian Team Championship"]
[Site "Sochi RUS"]
[Date "2012.04.11"]
[EventDate "2012.04.09"]
[Round "3"]
[Result "1/2-1/2"]
[White "Ramil Hasangatin"]
[Black "Grigoriy Oparin"]
[ECO "D00"]
[WhiteElo "2498"]
[BlackElo "2487"]
[PlyCount "71"]

1. d4 d5 2. Bg5 Nc6 3. Nc3 f6 4. Bh4 e5 5. e3 exd4 6. exd4
Nge7 7. Bb5 Be6 8. f3 Qd7 9. Nge2 O-O-O 10. Bf2 Nf5 11. Ba4
Nd6 12. Nb5 Kb8 13. Nxd6 Bxd6 14. Qd2 Rhe8 15. O-O-O Bf5
16. Ng3 Bg6 17. Rhe1 a6 18. Nf1 Rxe1 19. Rxe1 Re8 20. Rxe8+
Qxe8 21. Bg3 Qe6 22. Bxd6 Qxd6 23. Bxc6 Qxc6 24. b3 a5 25. Kb2
b6 26. Ne3 Qd6 27. h3 Qe6 28. Nd1 c6 29. Qe3 Qd6 30. Nc3 Kc7
31. Na4 Kb7 32. Kb1 Kc7 33. Kb2 Kb7 34. Kb1 Kc7 35. Kb2 Kb7
36. Kb1 1/2-1/2[/pgn]

(Game found thanks to Chess Tempo opening explorer).

Both engines followed some moves of this game out of the book in their two games, when both of them deviated with 7.- f3 instead of 7.- Bb5 played by Hasangatin.

Regards from Spain.

Ajedrecista.

Here some analysis with Rebel 16 that was accidentally left running for a few days in a position from the Komodo - Stockfish game after 12...Rb8 Rebel prefers 13. Nh3 over 13. Kb1 but I think the position is bad now for White. It takes Rebel quite some time though, to see something below -1 for White and it may go up again.

If 13. Nh3:


[fen]1r1q1b1r/ppp1nk2/2n2pp1/3p1b2/3P3p/P1N1BP1N/1PPQ2PP/2KR1B1R b - -[/fen]


Engine: Rebel 16 (512 MB)
gemaakt door Ed Schroder and Chris Whittington (C) 2022

.
.
.

29/56 8:16 -1.26 13...Lxh3 14.gxh3 Pf5 15.Ld3 Pxe3
16.Dxe3 f5 17.Kb1 Lg7 18.Le2 Te8
19.Df2 Dd6 20.f4 Pa5 21.The1 c6
22.Ld3 Txe1 23.Txe1 Lf6 24.Pa2 Pc4
25.c3 Te8 26.Txe8 Kxe8 (318.949.101) 642

30/58 15:10 -1.19 13...Lxh3 14.gxh3 Pf5 15.f4 Dd6
16.Ld3 Pxe3 17.Dxe3 f5 18.Pb5 Dd7
19.c4 a6 20.cxd5 axb5 21.dxc6 Dxc6+
22.Kb1 Te8 23.Df2 Dd5 24.The1 Txe1
25.Txe1 Ld6 26.De3 Kg7 (766.801.721) 841

(The real depth here is about 38 plies in the position before 13. Nh3:

37/61 842:15 -0.80 13.Ph3 Lxh3 14.gxh3 Pf5 15.f4 Pce7
16.Tg1 Dd7 17.Kb1 b5 18.Pa2 Pc8
19.Ld3 Tg8 20.De2 Pcd6 21.Ld2 c6
22.Dg2 Te8 23.Pc1 Pe4 24.Pb3 Te6
25.Lc1 De8 26.c3 (58.399.775.915) 1155

38/64 1020:25-0.96-- 13.Ph3 Lxh3 (70.606.207.357) 1153

38/58 1452:38-0.80++ 13.Ph3 Dd7 14.Pf4 Pa5 (99.007.192.485) 1135

38/70 2263:21-1.12-- 13.Ph3 Lxh3 (154.439.285.856) 1137)

[pgn][Event "CCRL 40/15"]
[Site "CCRL"]
[Date "2022.11.25"]
[Round "852.1.10"]
[White "Dragon by Komodo 3.1 64-bit 4CPU"]
[Black "Stockfish 20221120 64-bit 4CPU"]
[Result "0-1"]
[ECO "D00"]
[Opening "Levitsky attack (Queen's bishop attack)"]
[PlyCount "155"]
[WhiteElo "3526"]
[BlackElo "3553"]

1. d4 {book} d5 {book} 2. Bg5 {book} Nc6 {book} 3. Nc3 {book} f6 {book} 4. Bh4
{book} e5 {book} 5. e3 {-0.64/28 19s} exd4 {+0.41/36 26s} 6. exd4 {-0.56/28
15s} Nge7 {+0.43/36 17s} 7. f3 {-0.58/31 41s} Bf5 {+0.47/37 46s} 8. Qd2
{-0.63/30 16s} h5 {+0.50/32 7.1s} 9. a3 {-0.57/30 18s} Kf7 {+0.60/35 38s} 10.
Bf2 {-0.48/27 17s} g6 {+0.53/33 8.1s} 11. Be3 {-0.58/28 17s} h4 {+0.55/34 12s}
12. O-O-O {-0.43/29 26s} Rb8 {+0.58/34 11s} 13. Kb1 {-0.61/28 21s} b5 {+1.11/28
12s} 14. Nxb5 {-1.47/27 38s} Nc8 {+1.13/28 14s} 15. Ka1 {-1.49/30 48s} Nb6
{+1.50/31 12s} 16. Bf4 {-2.06/27 17s} Qd7 {+1.63/35 20s} 17. Bxc7 {-1.77/29
20s} Rb7 {+1.62/34 18s} 18. Bxb6 {-2.03/31 19s} Rxb6 {+2.04/34 18s} 19. Nc3
{-2.26/31 20s} Qd6 {+1.96/34 18s} 20. Bb5 {-2.30/30 24s} Bh6 {+2.05/37 14s} 21.
f4 {-2.57/29 14s} Rhb8 {+2.13/37 16s} 22. Nf3 {-2.59/28 9.1s} Rxb5 {+2.11/35
16s} 23. Nxb5 {-2.68/28 13s} Rxb5 {+2.05/35 17s} 24. Nxh4 {-2.77/30 16s} Be4
{+2.17/35 27s} 25. Qc3 {-2.99/28 7.7s} Bxf4 {+2.24/35 18s} 26. Rhf1 {-3.10/29
12s} Na5 {+2.29/40 26s} 27. Rde1 {-2.98/29 8.4s} Kg7 {+2.25/38 21s} 28. Rf2
{-3.22/29 14s} Qc7 {+2.25/38 21s} 29. a4 {-3.37/28 9.1s} Rb7 {+2.33/38 17s} 30.
Qxc7+ {-3.39/33 18s} Bxc7 {+2.31/38 23s} 31. Nf3 {-3.44/35 13s} g5 {+2.37/39
20s} 32. Rfe2 {-3.44/37 13s} Nc4 {+2.39/39 21s} 33. b3 {-3.41/37 13s} Nd6
{+2.41/41 22s} 34. Kb2 {-3.41/38 13s} Bd8 {+2.37/41 68s} 35. Nd2 {-3.41/38 11s}
f5 {+2.50/40 14s} 36. c3 {-3.44/36 21s} a5 {+2.50/35 15s} 37. g3 {-3.73/35 60s}
Rb8 {+2.53/40 18s} 38. Ka3 {-3.65/33 24s} Be7 {+2.42/39 18s} 39. Ka2 {-3.73/34
9.4s} Bf6 {+2.58/37 13s} 40. Rd1 {-3.73/35 12s} Bc2 {+2.61/43 14s} 41. Rc1
{-4.39/37 158s} Bd3 {+2.58/36 14s} 42. Re3 {-4.53/32 18s} Be4 {+2.55/41 19s}
43. Re2 {-4.49/32 16s} Kf7 {+2.64/36 17s} 44. Nxe4 {-3.86/32 19s} dxe4
{+2.94/36 20s} 45. Rf1 {-4.12/29 26s} Ke6 {+3.23/36 73s} 46. Ref2 {-5.40/28
24s} Bg7 {+3.50/29 13s} 47. Rg2 {-5.05/26 7.9s} Rf8 {+3.49/28 19s} 48. Kb1
{-5.55/24 10s} Bh6 {+3.62/30 19s} 49. h4 {-6.20/28 21s} g4 {+4.04/29 31s} 50.
Kc2 {-6.24/28 20s} Rc8 {+4.08/31 31s} 51. h5 {-6.47/29 20s} e3 {+4.23/31 18s}
52. Kd3 {-7.15/29 15s} Ne4 {+4.52/32 22s} 53. c4 {-7.22/25 6.8s} Rb8 {+4.39/28
15s} 54. Rb1 {-7.19/26 6.1s} Nf2+ {+4.66/28 18s} 55. Kc2 {-7.39/26 8.0s} Rd8
{+4.73/30 20s} 56. Re1 {-7.84/26 8.2s} Kf6 {+4.92/30 18s} 57. b4 {-7.80/27 18s}
Rxd4 {+5.08/30 17s} 58. bxa5 {-8.47/26 19s} Rxc4+ {+5.13/28 26s} 59. Kb3
{-8.95/25 7.4s} Rc5 {+5.21/30 17s} 60. a6 {-7.62/24 11s} Ra5 {+5.33/29 18s} 61.
Re2 {-8.67/26 18s} Rxa6 {+5.36/27 21s} 62. Re1 {-8.38/24 7.3s} Ra8 {+5.70/26
22s} 63. Ka3 {-9.29/24 11s} Nd3 {+5.99/26 20s} 64. Rd1 {-10.77/24 11s} Bf8+
{+6.37/26 20s} 65. Ka2 {-9.69/27 13s} Rxa4+ {+6.63/27 17s} 66. Kb1 {-11.11/24
6.6s} Rb4+ {+6.97/27 18s} 67. Ka1 {-11.73/23 6.3s} Nf2 {+7.57/24 15s} 68. Re1
{-12.21/25 15s} Bh6 {+7.82/23 14s} 69. Rf1 {-13.42/24 13s} Rd4 {+8.88/26 38s}
70. Kb2 {-13.95/24 7.9s} Rd2+ {+10.22/21 8.5s} 71. Ka3 {-15.58/25 18s} Ne4
{+10.46/22 14s} 72. Rgg1 {-16.03/23 8.6s} e2 {+10.88/23 33s} 73. Re1 {-17.03/25
26s} Kg5 {+10.88/20 6.9s} 74. Rc1 {-17.27/24 15s} Nxg3 {+11.30/20 7.4s} 75. Rg2
{-24.88/24 32s} Rd1 {+14.63/20 9.3s} 76. Rxe2 {-24.72/23 6.2s} Rd3+ {+16.01/19
5.2s} 77. Kb4 {-26.73/23 9.8s} Nxe2 {+17.27/23 4.8s} 78. Rc8 {-43.32/29 26s,
Black wins by adjudication} 0-1[/pgn]

[Eelco de Groot]

[fen]1r1q1b1r/ppp1nk2/2n2pp1/3p1b2/3P3p/P1N1BP1N/1PPQ2PP/2KR1B1R b - -[/fen]


32/56 49:10 -1.48 13...Lxh3 14.gxh3 Pf5 15.Tg1 Pxe3
16.Dxe3 Lh6 17.f4 Dd6 18.Kb1 Lxf4
19.Df3 Lxh2 20.Tg2 Lg3 21.Pe2 f5
22.Pxg3 hxg3 23.Txg3 Tbe8 24.c3 Te6
25.Ld3 Pe7 26.Df2 c6 (3.061.175.268) 1037

[Eelco de Groot]

[fen]1r1q1b1r/ppp1nk2/2n2pp1/3p1b2/3P3p/P1N1BP1N/1PPQ2PP/2KR1B1R b - -[/fen]


32/56 49:10 -1.48 13...Lxh3 14.gxh3 Pf5 15.Tg1 Pxe3
16.Dxe3 Lh6 17.f4 Dd6 18.Kb1 Lxf4
19.Df3 Lxh2 20.Tg2 Lg3 21.Pe2 f5
22.Pxg3 hxg3 23.Txg3 Tbe8 24.c3 Te6
25.Ld3 Pe7 26.Df2 c6 (3.061.175.268) 1037

Just in case anyone wants to see what happens a bit deeper into the 13. Nh3 line from Rebel, the computer was still running but now doing some backwards analysis. The line stays fairly consistent that is, for me, usually a good sign (Bob Hyatt used to disagree once, he found changing PVs more attractive/realistic. Or something like that. It was a long time ago )

Alternative for 24. c3 is 24. Qf2 but it does not change much in the eval and going backwards Rebel chooses 24. c3 again. But here it was 24. Qf2 so this should probably be the main line because this is Rebel's choice at this point:


[fen]4r2r/ppp2k2/2nq2p1/3p1p2/3P4/P4QRP/1PP5/1K1R1B2 w - -[/fen]


37/67 1227:03-1.15 24.Df2 Te6 25.Ld3 Tf6 26.Le2 Ke7
27.c4 Kd8 28.Tc3 Kc8 29.cxd5 Pd8
30.Tdc1 Th7 31.h4 Kb8 32.Lf3 Tff7
33.Tb3 Te7 34.Th1 a6 35.Ka2 Th8
36.Dc2 Tf7 37.Dd3 (87.385.250.680) 1186


One possible endpoint but this is bad for White, it is not in the mainline.


[fen]3k3r/ppp5/2nqr1p1/3p1p2/3P4/P1PB2RP/1P3Q2/1K1R4 w - -[/fen]


38/65 1203:38-1.69 27.h4 Pe7 28.Tg5 a6 29.Ka2 Tf6
30.Th1 Tff8 31.Tg3 Kc8 32.Te3 f4
33.Te5 Kb8 34.De1 Tf7 35.Df2 Thf8
36.The1 Ka7 37.Te6 Dd7 38.Df3 Dd8
39.T1e5 c6 40.Df2 (86.127.498.366) 1192

This is in the mainline:


[fen]1r5r/ppp2k2/2nq1pp1/3p4/3P3p/P4QbP/1PP1N1R1/1K1R1B2 b - -[/fen]


36/61 472:20 -1.24 21...f5 22.Pxg3 hxg3 23.Txg3 Th4
24.c3 Te8 25.Ld3 Te6 26.Df2 Tf4
27.Dg2 Pe7 28.Th1 Th4 29.Tf3 Ke8
30.Df2 Th5 31.h4 Kd7 32.Tg3 Kc8
33.Tg5 Th6 34.h5 Kb8 (33.706.142.848) 1189

37/74 1195:50-1.13 21...f5 22.Pxg3 hxg3 23.Txg3 Th4
24.c3 Te8 25.Ld3 Te6 26.Df2 Tf4
27.Dg2 Pe7 28.Th1 Th4 29.Tf3 Ke8
30.Df2 Th5 31.h4 Kd7 32.Tg3 Kc8
33.Tg5 Th6 34.h5 Kb8 (85.491.897.500) 1191

38/75 2155:03-1.29++ 21...f5 22.Ka2 Kg7 23.c3 (153.551.555.133) 1187

38/76 2798:29-0.97-- 21...f5 22.Pxg3 (199.448.172.675) 1187

And this also:


[fen]1r1q3r/ppp2k2/2n2ppb/3p4/3P3p/P1N1QP1P/1PP4P/2KR1BR1 w - -[/fen]


35/58 94:53 -1.24 17.f4 Dd6 18.Kb1 Lxf4 19.Df3 Lxh2
20.Tg2 Lg3 21.Pe2 f5 22.Pxg3 hxg3
23.Txg3 Tbe8 24.c3 Te6 25.Ld3 Ke8
26.Th1 Pe7 27.Df2 a6 28.h4 Kd7 29.h5 Txh5
30.Txh5 (6.670.420.590) 1171

36/56 122:56 -1.08++ 17.f4 Pe7 18.Df2 (8.609.267.207) 1167

36/58 131:26 -1.13 17.f4 Dd6 18.Kb1 Lxf4 19.Df3 Lxh2
20.Tg2 Lg3 21.Pe2 f5 22.Pxg3 hxg3
23.Txg3 Tbe8 24.c3 Te6 25.Ld3 Ke8
26.Th1 Pe7 27.Df2 Th4 28.Tf3 Th5
29.h4 a6 30.Tg3 (9.209.391.643) 1167

37/60 199:27 -0.97++ 17.f4 Pe7 18.Df2 (13.915.491.285) 1162

37/59 212:11 -0.97 17.f4 Dd6 18.Kb1 Lxf4 19.Df3 Lxh2
20.Tg2 Lg3 21.Pe2 f5 22.Pxg3 hxg3
23.Txg3 Tbe8 24.c3 Te6 25.Ld3 Ke8
26.Th1 Pe7 27.Df2 Th4 28.Tf3 Th5
29.Tg3 Kd8 30.h4 (14.798.436.478) 1162


Rebel's mainline, but with 24. c3, inserted into the pgn:

[pgn][Event "CCRL 40/15"]
[Site "CCRL"]
[Date "2022.11.25"]
[Round "852.1.10"]
[White "Dragon by Komodo 3.1 64-bit 4CPU"]
[Black "Stockfish 20221120 64-bit 4CPU"]
[WhiteElo "3526"]
[BlackElo "3553"]
[ECO "D00"]
[Result "0-1"]

1. d4 {book} d5 {book} 2. Bg5 {book} Nc6 {book} 3. Nc3
{book} f6 {book} 4. Bh4 {book} e5 {book} 5. e3 {-0.64/28
19s} exd4 {+0.41/36 26s} 6. exd4 {-0.56/28 15s} Nge7
{+0.43/36 17s} 7. f3 {-0.58/31 41s} Bf5 {+0.47/37 46s}
8. Qd2 {-0.63/30 16s} h5 {+0.50/32 7.1s} 9. a3 {-0.57/30
18s} Kf7 {+0.60/35 38s} 10. Bf2 {-0.48/27 17s} g6 {+0.53/33
8.1s} 11. Be3 {-0.58/28 17s} h4 {+0.55/34 12s} 12. O-O-O
{-0.43/29 26s} Rb8 {+0.58/34 11s} 13. Kb1 {-0.61/28 21s}
(13. Nh3 {Rebel} Bxh3 14. gxh3 Nf5 15. Rg1 Nxe3 16. Qxe3 Bh6 17. f4
Qd6 18. Kb1 Bxf4 19. Qf3 Bxh2 20. Rg2 Bg3 21. Ne2 f5
22. Nxg3 hxg3 23. Rxg3 Rbe8 24. c3 Re6 25. Bd3 Ke8 26. Qf2
Kd8) 13... b5 {+1.11/28 12s} 14. Nxb5 {-1.47/27 38s} Nc8
{+1.13/28 14s} 15. Ka1 {-1.49/30 48s} Nb6 {+1.50/31 12s}
16. Bf4 {-2.06/27 17s} Qd7 {+1.63/35 20s} 17. Bxc7
{-1.77/29 20s} Rb7 {+1.62/34 18s} 18. Bxb6 {-2.03/31 19s}
Rxb6 {+2.04/34 18s} 19. Nc3 {-2.26/31 20s} Qd6 {+1.96/34
18s} 20. Bb5 {-2.30/30 24s} Bh6 {+2.05/37 14s} 21. f4
{-2.57/29 14s} Rhb8 {+2.13/37 16s} 22. Nf3 {-2.59/28 9.1s}
Rxb5 {+2.11/35 16s} 23. Nxb5 {-2.68/28 13s} Rxb5 {+2.05/35
17s} 24. Nxh4 {-2.77/30 16s} Be4 {+2.17/35 27s} 25. Qc3
{-2.99/28 7.7s} Bxf4 {+2.24/35 18s} 26. Rhf1 {-3.10/29 12s}
Na5 {+2.29/40 26s} 27. Rde1 {-2.98/29 8.4s} Kg7 {+2.25/38
21s} 28. Rf2 {-3.22/29 14s} Qc7 {+2.25/38 21s} 29. a4
{-3.37/28 9.1s} Rb7 {+2.33/38 17s} 30. Qxc7+ {-3.39/33 18s}
Bxc7 {+2.31/38 23s} 31. Nf3 {-3.44/35 13s} g5 {+2.37/39
20s} 32. Rfe2 {-3.44/37 13s} Nc4 {+2.39/39 21s} 33. b3
{-3.41/37 13s} Nd6 {+2.41/41 22s} 34. Kb2 {-3.41/38 13s}
Bd8 {+2.37/41 68s} 35. Nd2 {-3.41/38 11s} f5 {+2.50/40 14s}
36. c3 {-3.44/36 21s} a5 {+2.50/35 15s} 37. g3 {-3.73/35
60s} Rb8 {+2.53/40 18s} 38. Ka3 {-3.65/33 24s} Be7
{+2.42/39 18s} 39. Ka2 {-3.73/34 9.4s} Bf6 {+2.58/37 13s}
40. Rd1 {-3.73/35 12s} Bc2 {+2.61/43 14s} 41. Rc1 {-4.39/37
158s} Bd3 {+2.58/36 14s} 42. Re3 {-4.53/32 18s} Be4
{+2.55/41 19s} 43. Re2 {-4.49/32 16s} Kf7 {+2.64/36 17s}
44. Nxe4 {-3.86/32 19s} dxe4 {+2.94/36 20s} 45. Rf1
{-4.12/29 26s} Ke6 {+3.23/36 73s} 46. Ref2 {-5.40/28 24s}
Bg7 {+3.50/29 13s} 47. Rg2 {-5.05/26 7.9s} Rf8 {+3.49/28
19s} 48. Kb1 {-5.55/24 10s} Bh6 {+3.62/30 19s} 49. h4
{-6.20/28 21s} g4 {+4.04/29 31s} 50. Kc2 {-6.24/28 20s} Rc8
{+4.08/31 31s} 51. h5 {-6.47/29 20s} e3 {+4.23/31 18s}
52. Kd3 {-7.15/29 15s} Ne4 {+4.52/32 22s} 53. c4 {-7.22/25
6.8s} Rb8 {+4.39/28 15s} 54. Rb1 {-7.19/26 6.1s} Nf2+
{+4.66/28 18s} 55. Kc2 {-7.39/26 8.0s} Rd8 {+4.73/30 20s}
56. Re1 {-7.84/26 8.2s} Kf6 {+4.92/30 18s} 57. b4 {-7.80/27
18s} Rxd4 {+5.08/30 17s} 58. bxa5 {-8.47/26 19s} Rxc4+
{+5.13/28 26s} 59. Kb3 {-8.95/25 7.4s} Rc5 {+5.21/30 17s}
60. a6 {-7.62/24 11s} Ra5 {+5.33/29 18s} 61. Re2 {-8.67/26
18s} Rxa6 {+5.36/27 21s} 62. Re1 {-8.38/24 7.3s} Ra8
{+5.70/26 22s} 63. Ka3 {-9.29/24 11s} Nd3 {+5.99/26 20s}
64. Rd1 {-10.77/24 11s} Bf8+ {+6.37/26 20s} 65. Ka2
{-9.69/27 13s} Rxa4+ {+6.63/27 17s} 66. Kb1 {-11.11/24
6.6s} Rb4+ {+6.97/27 18s} 67. Ka1 {-11.73/23 6.3s} Nf2
{+7.57/24 15s} 68. Re1 {-12.21/25 15s} Bh6 {+7.82/23 14s}
69. Rf1 {-13.42/24 13s} Rd4 {+8.88/26 38s} 70. Kb2
{-13.95/24 7.9s} Rd2+ {+10.22/21 8.5s} 71. Ka3 {-15.58/25
18s} Ne4 {+10.46/22 14s} 72. Rgg1 {-16.03/23 8.6s} e2
{+10.88/23 33s} 73. Re1 {-17.03/25 26s} Kg5 {+10.88/20
6.9s} 74. Rc1 {-17.27/24 15s} Nxg3 {+11.30/20 7.4s} 75. Rg2
{-24.88/24 32s} Rd1 {+14.63/20 9.3s} 76. Rxe2 {-24.72/23
6.2s} Rd3+ {+16.01/19 5.2s} 77. Kb4 {-26.73/23 9.8s} Nxe2
{+17.27/23 4.8s} 78. Rc8 {-43.32/29 26s, Black wins by
adjudication} 0-1[/pgn]