Gyula Sax vs Raymond Keene (1972)

Gyula Sax vs Raymond Keene
Teesside 1972 · Pirc Defense: Bayonet Attack (B07) · 1-0

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Jan-29-12		Fusilli: Wild game! It looks like against the Bayonet attack Black has to play very aggressively on the queenside. Otherwise White will get a dangerous attack. Here it didn't work, but here it did:Sax vs H Kestler, 1974.

Jan-29-12		rilkefan: Stockfish thinks that white was in real trouble after the calm 14...Be6 (15.b3 Qa5 16.Na4 Rb4 17.a3 Rxa4 18.bxa4 Qa5 and black's queen is very active, or 15..d5 and black gets lots of open lines), worth -1.25 at a depth of 25. After Rxb2 it thinks black is worse but still in the game after 15...Be6.

Jan-29-12		rilkefan: At another two ply sf thinks white should instead play 15.Na4 Bxa2 16.b3 Ne8 etc., -1.8. In some lines white picks up the bishop but black gets a bunch of pawns and a continuing attack. After 15.b3 Qa5 it's looking at 16.Rf1 Qa3+ 17.Kd1 Qb2 which is over two pawns worse, or 16...Nd7/Qe5/Qa5 (after white's c3)/Rb4/Rfb8/Nc5 with a three pawn advantage - surprised it's not more. If instead the above 16.Na4 it thinks ...Rb4 is crushing, preferring to just drop the a4 knight after ....Rxa4 to get queens off rather than allow ...Qc5; the line is evaluating at -3.5. I don't see the thematic diagonal-clearing ...Nxe4 getting played but presumably that's in the air too.

Jan-29-12		Fusilli: <rilkefan> Thanks for the variations. In one of them (<Stockfish thinks that white was in real trouble after the calm 14...Be6 (15.b3 Qa5 16.Na4 Rb4 17.a3 Rxa4 18.bxa4 Qa5 and black's queen is very active>) you have 18...Qa5 when the queen was already there, but I am content with seeing great possibilities for black after 14...Be6.

Jan-29-12		rilkefan: Interestingly, following down the 15.Na4 Bxa2 16.b3 Ne8 line I just see the evaluations getting worse and worse for white. Black has a lot of advantages in this position, and they're worth more than sf realizes at first. Those advantages as I see them are: - domination of the black squares: not just h1-g8 but (after d5/Qe7 or d6) h3-f8 and d8-h4 if white develops Nh3 - breaking through in the center with d5 to make more open lines for the attack - white's undeveloped kside, with the bishop e2 and the f3 pawn complicating things - black's secure king - black's flexibility The line I've followed deepest is: 17. Nh3 d5 18. Qe3 Nc7 19. e5 Qe7 20. Kb2 Bxb3 21. cxb3 Bxe5+ 22. Ka2 Qb4 23. Rd3 Rfe8 24. Bd1 Na6 25. Qd2 Bd6 26. Qb2 Bf8 27. Nf2 Qf4 and here one sees that white is completely disorganized while black's pieces are all great: -3 per sf.

Jan-29-12		rilkefan: <<Fusilli>: you have 18...Qa5> Oops, that should have been Qe5, thanks.

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