26th 4NCL Weekend Congress (Woodland Grange, Warwickshire) U2000 Round 5
King's Indian
1.d4 d6 2.Nf3 Nf6 3.c4 g6 4.Nc3 Bg7 5.Bg5
More popular in ChessBase's 2021 Mega database are 5.g3 and especially 5.e4, but there are almost 4,000 examples of the text.
5...0-0 6.Qd2!?
This is Stockfish14's choice, at least for a while, but much more popular is 6.e3.
6...c5 7.d5
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| How should Black proceed? |
*****
*****
*****
*****
7...b5!?
Stockfish14 is keen on this Benko-style gambit.
8.Bxf6!?
Stockfish14 and Komodo12.1.1 slightly prefer 8.cxb5, which has been played by Shakhriyar Mamedyarov (2817) and Artur Yusupov. (2565).
8...exf6!
The engines agree this is better than the obvious 8...Bxf6. By capturing with the pawn, Black gets a half-open central file and a pawn-ram to batter either e3 or g3,
9.Nxb5 Qb6
The engines prefer kingside play with 9...Bg4.
10.e3 Nd7 11.Be2 f5 12.0-0 Nf6 13.a4 Ne4 14.Qc2 Qd8!?
Black has full compensation for the pawn, according to the engines.
15.Bd3 Ng5?
But this is too much. The engines reckon 15...a6 16.Nc3 Nxc3 offers equal chances.
16.Nxg5 Qxg5 17.Nxd6 Bd7 18.Rab1 a6?
This does not trap the knight, and so just wastes time.
19.Nb7 Rfc8 20.Rfd1!?
Preparing a piece-sacrifice.
20...Rab8 21.Nxc5!
Also good is 21.Na5, but the text is preferred by the engines, although it takes Komodo12.1.1 a little time to come to this view.
21...Rxc5 22.b4 Rcc8 23.c5 f4
The engines agree going for counterplay like this is Black's best chance.
24.exf4 Qxf4 25.c6 Bg4 26.Re1 Rxb4?
Black should play 26...Qg5 or 26...Be5, according to the engines.
27.Rxb4 Qxb4 28.Re4 Qd6 29.Bxa6!
This is even stronger than immediately capturing the black light-square bishop.
29...Qf6?
The engines prefer 29...Bd1!?, eg 30.Qxd1 Rxc6, but 31.Bc4 leaves White two pawns up, albeit the presence of opposite-coloured bishops gives Black hope.
30.Rxg4 Qa1+ 31.Bf1 Be5 32.g3 Bd6 33.Kg2 Rb8 34.c7 Rc8 35.Rc4 Qe5 36.Bd3?
Better is 36.Qe4, eg 36...Qxe4+ 37.Rxe4 Rxc7 38.a5.
36...Qxd5+ 37.Be4 Qe5 38.f4 Qe7 39.Bc6!?
This is Komodo12.1.1's choice, at least at first, but it comes to equally like Stockfish14's top line: 39.a5 Rxc7 40.a6.
39...Rxc7 40.Qc3?
White still has the upper hand, according to the engines, after 40.a5.
40...Qe2+ 41.Kg1 Qd1+
The engines' 41...g5!? seems to fully equalise, eg 42.a5 gxf4 43.gxf4 Bf8, when the white king appears too exposed for serious winning chances.
42.Kf2 Re7??
White is better, but probably not winning, after, for example, 42...Bf8 43.Qc2 Qd6.
43.Be4?
White's back-rank mating threat means 43.Bf3 wins instantly.
43...f6??
The engines reckon Black had to play 43...Rd7, when it is hard to see how White makes progress.
44.Rd4
Black is busted.
The game finished:
44...Bc5? 45.Qxc5 Qa1 46.Rd8+ Kg7 47.Qxe7+ Kh6 48.Qf8+ Kh5 49.Bf3#
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