interesting game

[jdart]

This was played recently on FICS, using the still-experimental NNUE-enabled version of Arasan.

[pgn][Event "freechess.org"]
[Site "freechess.org"]
[Date "2021.08.14"]
[Round "?"]
[White "exeComp"]
[Black "Arasan v22.3.0-48-gd184a65"]
[Result "0-1"]
[ECO "E46"]
[WhiteElo "2672"]
[BlackElo "2613"]
[PlyCount "147"]
[EventDate "2021.??.??"]
[TimeControl "960+3"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nge2 Re8 $5 {scores better than ..
d5} 6. a3 Bf8 7. d5 d6 (7... a5 $5) 8. g3 Nbd7 9. dxe6 $2 ({better is} 9. Bg2
$11) 9... fxe6 10. Bg2 c6 11. e4 Nb6 $1 $146 (11... e5 12. O-O Nb6 13. b3 Be6
14. Be3 Qd7 15. Qd3 Rad8 16. Rad1 Qf7 17. f4 Ng4 18. f5 Qh5 19. h4 Nxe3 20.
Qxe3 Bf7 21. Bf3 Qh6 22. Qxh6 gxh6 23. Kh2 h5 24. a4 a5 25. Rd3 Nd7 26. Rb1 Nc5
27. Rdd1 Bh6 28. Nc1 Kg7 29. Nd3 Be3 30. Nxc5 Bxc5 31. Rd3 Kf6 32. Rbd1 Rd7 33.
R1d2 Ra8 34. Nd1 Rb8 35. Ne3 Bd4 36. Nc2 Bc5 37. Ne3 Ke7 38. Rg2 Rg8 39. Rgd2
Kd8 40. Bd1 Kc7 41. Bf3 {Kasparov,S (2481)-Wohl,A (2432) Cutro 2006 1-0 (66)})
12. b3 d5 13. e5 Nfd7 14. f4 dxc4 15. bxc4 Nc5 16. Nd4 Re7 17. O-O Rd7 18. Be3
Nxc4 19. Bf2 Na5 20. Ra2 {Black has a mobility problem: especially the Bc8. I
was looking at the score here (+1.3 or so) and thinking "what's so great about
Black's position?"} Ncb3 21. Nxb3 {forced. Going into an imbalanced material
endgame.} Rxd1 22. Rxd1 Qc7 23. Nxa5 Qxa5 24. Ne4 Be7 25. h4 b6 26. h5 Ba6 27.
h6 gxh6 28. Rad2 Bc4 29. Rd7 Kf8 30. Nf6 Bd5 {locks in the White Rook in d7.
White probably thought it had some kind of attack going, but in fact White is
in trouble.} 31. f5 Qxa3 32. Bxd5 $2 {White should not exchange down material.
Black's connected passers are more dangerous in the endgame.} (32. Nxh7+ {
was better but White would still be worse.}) 32... exd5 33. Nxh7+ Kg8 34. f6
Re8 35. Rxe7 {Forced. More exchanges.} Rxe7 36. fxe7 Kf7 37. e8=Q+ Kxe8 38. Re1
$2 {Moving the Rook off the d file will make it easier for Black to advance
the d-pawn.} Ke7 39. Nf6 d4 40. e6 $19 Qf3 41. Ne4 c5 42. Nd6 Qd5 43. Nc8+ Ke8
44. Re4 d3 45. Be1 {The rest of the endgame is played very precisely, with the
aid of 6-man TBs.} d2 46. Bxd2 Qxd2 47. e7 c4 48. Rf4 Qxf4 49. gxf4 c3 50. Nd6+
Kxe7 51. Nf5+ Kf6 52. Ne3 c2 53. Nxc2 Kf5 54. Kf2 Kxf4 55. Ke2 Ke5 56. Kd3 Kf4
57. Na3 Kg4 58. Nb5 a5 59. Ke3 Kf5 60. Nd6+ Ke6 61. Nb5 Kf6 62. Nc3 Ke6 63. Na4
b5 64. Nc3 b4 65. Na4 h5 66. Kd4 h4 67. Nc5+ Kd6 68. Ne4+ Kc6 69. Nd2 h3 70.
Nf3 Kb5 71. Kd3 Ka4 72. Kd2 Ka3 73. Kc2 Ka2 74. Kd3 0-1[/pgn]

[peter]

the still-experimental NNUE-enabled version of Arasan.

Go, Arasan, go

[AdminX]

I reviewed the game with Ceres 0.93

[d]r1bqrbk1/pp1n2pp/1np1p3/3pP3/2P5/PPN3P1/4NPBP/R1BQK2R w KQ - 0 14

It appears that this is a critical position. 14 f4 may not have been the best choice.

14.cxd5 Nxe5 15.dxc6 Nd3+ 16.Kf1 bxc6 17.Be4 Ba6 18.Kg2 Nc5 19.Qxd8 Rexd8 20.Bc2 e5 21.Bg5 Rd6 22.Rad1 Ne6 23.Rxd6 Bxd6 24.h4 h6 25.Be3 Nd5 26.Be4 Bxe2 27.Nxe2 Bxa3 28.Ra1 Bc5 29.Rc1 Bxe3 30.Rxc6 Nec7 31.fxe3 Rf8

The position is equal: = (-0.02) Depth: 26/58 00:07:59 4638kN, tb=59

Black has a mobility problem: especially the Bc8. I was looking at the score here (+1.3 or so) and thinking "what's so great about Black's position?"

[d]r1bq1bk1/pp1r2pp/2p1p3/n1n1P3/3N1P2/P1N3P1/R4BBP/3Q1RK1 b - - 0 20

Well aside from the isolated e6 pawn, I would ask what is so bad about black's position? The Bc8 is a temporary weakness at the moment, and is it really a weakness if white cannot exploit it? Optically it does look a little awkward, but white does not have free rein here as there are issues white has to take care of currently.

PS: As human, I liked the exchange sac attempt , but also loved black's 48. ... Qxf4!!