Thursday, 7 November 2024

Lessons From Mallorca IX: Accuracy

THE following position arose after 32 moves in my round-nine game at the Colònia de Sant Jordi U2400.
Black's pieces are more actively placed than White's, and with 'normal' play Black would probably have an edge, but the position favours White, thanks to having a 'bolt from the blue'
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I played 33.c4+!
After the obvious, and best, reply, 33...dxc4, the correct follow-up is 34.Nc3+! Kxb4 35.Rb1, after which Black has problems, eg 35...b5 36.d5 Nef4?! (36...Ka5!? is objectively better, but White simply plays 37.dxe6) 37.Nd3+ Ka5 48.Nxb5 Bb4 49.Nxf4 Bxd2 40.Nxg6.
Alternatively Black can try 35...Ka5, but 36.Nxc4+ Ka6 37.Nb5 (37.Nxd6 is also strong) Bf4 38.Bxf4 Ngxf4 39.Nbd6! cxd6 40.Nxd6 wins the black rook, as Stockfish17 and Dragon1 point out, thanks to the threat of 41.Ra1#.
The game saw 34.d5?, the point being 34...Nef4?? loses to 35.Nd4#. But Black has the winning intermezzo 34...Be5!, leaving Black the equivalent of a rook or more ahead.
LESSON: imaginative play (33.c4+) is great, but is wasted if followed by a shoddy continuation (34.d5?) thanks to poor calculation.

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