Wednesday 15 March 2023

Gambit Chess

PLAYED last night on board two (of eight) for Battersea 2 against Wimbledon in division two of the London League.

Neil Cannon (1986) - Spanton (1976)
Evans Gambit
1.e4 e5 2.Nf3 Nc6 3.Bc4 bc5 4.b4 Bxb4 5.c3 Bd6!?
The Stone-Ware Defence - probably better than its reputation.
6.0-0
Much more common in ChessBase's 2023 Mega database is 6.d4, after which the mainline runs 6...Nf6 7.0-0, transposing to the game.
6...Nf6 7.d4 0-0
Not 7...Nxe4? 8.dxe5 Nxe5 9.Nxe5 Bxe5 10.Qd5 Qe7 11.Re1 etc (but not 11.Qxe4?? Bxh2+ and 12...Qxe4).
8.Bg5
The main move in Mega23 is 8.Re1, which Stockfish15 reckons gives White a slight edge, but Komodo13.02 calls equal.
8...h6 9.Bh4 Be7!? 10.Qe2 d6
How should White proceed?
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11.dxe5
Victor Nithander (2465) - Emil Hermansson (2469), Swedish Team Championship 2008-9, saw 11.Rd1 Bg4 12.h3 Bh5 13.d5 Na5 14.g4 Nxc4 with a large advantage for Black, according to the engines (0-1, 37 moves).
11...Nxe5 12.Nxe5 dxe5 13.Rd1 Qe8 14.h3 Bd7 15.Nd2 Bc6
White leads in development but Black is a pawn to the good and with no weaknesses
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16.Bg3 Bd6 17.Bd3 Rd8 18.Bh4 Be7 19.Bg3 Bd6 20.Bh4 Be7 21.Bg3 Nd7
Declining threefold repetition - Black is better.
22.Nf3
I was more concerned about 22.Nc4 with Na5 to come, but the engines reckon 22...Bg5 23.Na5 Nc5 24.Nxc6 Qxc6 is good for Black.
22...Bf6 23.Nh4 g6!? 24.Qe3 Kg7
Can White equalise material by grabbing the a7 pawn?
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No, or, rather, yes, but he would regret it, eg 25.Qxa7? Qe7 26.Nf3 Nc5, after which White cannot save both the light-square bishop and the queen.
25.Nf3 b6 26.Bh4 Qe7 27.Bxf6+ Qxf6 28.Bc2 Nc5 29.a3 Ne6 30.Kh2 Rxd1 31.Rxd1 Rd8 32.Rxd8 Nxd8 33.Kg1
The king moves are to little effect, but it is difficult to suggest a constructive plan for White, who has the inferior bishop and pawn-structure as well as being a pawn down.
33...Qd6 34.c4 Ne6 35.Qc3 Nd4 36.Nxd4 Qxd4 37.Qd3 Qxd3
The engines prefer keeping queens on the board, but getting them off simplifies matters (at least for a human).
38.Bxd3 Kf6 39.Kf1 Ke6 40.Ke2 Kd6 41.Kd2
41.Ke3 Kc5 is no improvement.
41...Kc5 42.Kc3 b5 43.h4 f6 44.g3?!
Hoping to set up a blockade, but 44.cxb5 is almost certainly better, although losing.
44...bxc4 45.Bc2 a5 46.Bb1 Ba4 47.Ba2 Bb3! 48.Bxb3
White will end up in zugzwang after 48.Bb1.
48...cxb3 49.Kxb3 Kd4
The game finished:
50.Ka4 c5 51.Kxa5 c4 52.Kb6 c3 53.a4 c2 54.a5 c1=Q 0-1
Battersea 2 won the match 5.5-2.5.

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