Chess no. 382

PIIILIDOR

Black White 7 men Touw Hian Bwee (Europe Echecs, July 1967). White to play and mate in two moves; solution

next week. = _ -- Solution to no. 381 (Parthasarthy): Kt- B 3!,

threat R - B 5. 1 . . . Kt x R; 2 B - K 5. I . R X R; 2 Q - B 3. 1 ...'K x R; 2 B -R 6. 1 ... Kt- K 6; 2 Q x Kt. To appreciate this complex modern problem note (a) the set play (i.e. play if Black

moves first), viz, 1 R - B 6; 2 B - K 5 and 1 ... B - B 6; 2 Q - B 3, (b) the play after the thematic tries 1 P - B 3? defeated by 1 . . . Kt X R! and I Q-QB 3? (1 R x R!).

I enjoyed The Chess Sacrifice by Vladimir Vukovic, translated by P. H. Clarke (G. Bell 35s), in many ways. The last three chapters—Psychology in Sacrifice,' Risk in Sacrifice,' Luck and Misfortune in Sacrifice'—I found especially interesting; and the fact that Vukovic is no respecter of persons in his analysis adds an agreeable astringency to the annotations. Here is a game from the book.

White, Euwe. Black, Najdorf. Opening, King's Indian (Zurich, 1953).

1 P-Q4 Kt-KB 3 2 P - QB 4 P -KKt 3 3 P -KKt 3 B -Kt 2 4 B - Kt 2 0 - 0 5 Kt-QB 3 P-B4 6 P-Q 5 P-K 4 7 B - Kt 5 P - KR 3. Black normally plays

7 . . P -Q 3; after which 8 Q -Q 2 and P - KR 3 is prevented. This transposition, how- ever, allows White a new possibility.

8 B x Kt Q x B

9 P -Q 6 . . . Vukovic gives this move '17. and remarks that although not a sacrifice it forces White to play for middle game complica- tions as the pawn will be fatally weak in the ending. This game is given in the 'Risk in Sacri- fice' chapter and is an example of positional risk.

9... Kt - B 3 10 P-K 3 P-Kt 3 11 B-Q5 K-R 1. 11 Q x P??; 12 B x P ch. 12 Kt-K4 Q-Q 1 13 P-KR4 P-Be

14 Kt - Kt 5 B -Kt 2! Black plays the defence

John Wells's 'Afterthought' appears on Page 486.

'well. If • now 15 'Kt - B 7 ch then 15 . • . R x Ktl; 16B x R, Kt - Kt 5; 17 B - Q 5, IX X B; 18 P x B, P -K 5! and 19 . . . Kt Q 6 ch with an excellent game. ;

15, 13--.1C-K; 4, P -K 5? Vukovic pqints out. that

Black should play 15 Q - B 3! with a good . • - same. The text gives White the valuable square ' B 4 for his Kt. A more restrained player than • "Plaided would not have made this error—but Plijdorf 'alWays' goes for 'the most aggresive -lid& • _ .

-16.Kt-C 2 B X P

Icsr.-ao Q - B 3. Against 17 . . . B x R; yokovic. ;gives 18 Q x B ch, Q- B 3; Ct X.P eh, K - Kt 2; 20 Q x Q ch, R x Q; 21 Kt - B 4!, P x Kt; 22 RP x P with advan-

'181:"X P B x R 19"KM 'x P ch K -Kt 2 20 Kt x P B-B6ch 21 K-B1 Q x BP

22 Ktc B4! K - R 1. 22 . . . B - K 4; 23 Kt,-Kt 3!, Q-R 2; 24 B-K 4, Q -Kt 1 (24 . . . Q-R I; 25 Kt-R 5 ch); 25 Kt (3)- R 5 ch, K - R 1; 26 Kt-Kt 6 ch and wins queen.

23 Kt X B QR - K 1 24 Kt (3)- K 2 R - KKt 1 25 P-R 5 R-Kt4

26 Kt - Kt 3 R X Kt. Relatively the best chances of a swindle, but the game is lost.

27 PxR RxP 28 K - B'2 R - K 1 29 R -K 1 RXR 30 Q x R K-Kt 2 31 Q - K 8 Q-B7ch 32 K - Kt 1 Q-Q 8 ch 33 K - R 2 Q-B7ch 34 Kt - Kt 2 Q-B4 35 Q -Kt 8 ch K-B3 36 Q -R 8 ch K - Kt 4 37 Q - Kt 7 ch Resigns. 37 . . . K x P; 38 B- B 7 ch, Q x B; 39 P - Kt 4 mate.

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