Chess

BY PHILIDOR

No. 74. Specially contributed by Dr. L. A. GARAZA (UruguaY) BLACK (5 mon) WRITE (8 men)

WHITE to play and smoalutetioinntnweoxtmwoeeveks: Solution to last week's problem by Fraenkel: Q-R- 1! waiting. 1 . • • Kt-Kt 5; 2 P X Kt (the point of the key move). 1 . . . 1Ct, (R 7) any other; , Q-B 3. 1 . . . 14-t (iK.t 6.) any py ; 2xK Kt-BR; 4. Kt x P. 1 . . . B any; 2 R x P. Unexpected and subtle key, worthy of Sam Loyd.

One of the most remarkable games at Moscow was Bronstein's win against Rojahn, in which Bronstein introduced an entirely novel PRO, sacrifice in one of the most hackneyed of all opening variations. I am sure it is not sound-- but most unpleasant to meet unexpectedly when up against a much stronger player. Black lost through playing too passively—he never made his extra

piece iework.

White Black D. BRONSTEIN (USSR) E. ROJAHN (NorwaY) Opening, Two Knights.

1 P-K 4 P-K 4 20 Q x B Q-B 3 (e)

2 Kt-K B 3 Kt-Q B 3 21 P-K 5 Q-B 4

43 Kt-Kt 5 P-Q 4 22 P-B - t- 5PxP Kt-QR4 2243 QK-t-KKB43 BQ-R2(-2K(tel

6 P-Q 3 P-K R 3 25 P-K Kt 4 Q-Kt 3 7 Kt-K B 3 P-K 5 26 P-B 5 Q-Kt 3

8 P x P17 (a) Kt x B 27 Q-Kt 3 P-B 3 9 Q-Q 4 Kt-Kt 3 (b) 28 P-K 6 Kt-K 4

10 P-B 4 P-B 4 29 P-K R 4 K-R I 11 Q-Q 3 B-Kt 5 30 P-Kt 5 Q R-B 1 (4)

12 Q Kt-Q 2 B-K 2 (e) 31 K-R I (I) Q-Q I

13 0-

0-0 (d) 32 P-Kt 6 B x P (I) 14 Kt-0K 5 B-R 4 33 P x "B P-Kt 4

15 P- Kt 3 Q Kt-Q 2 34 P-Q 6 Q-Kt 3

16 B-Kt 2 Kt x Kt 35 P-Q 7 Kt x Q P 17 B x Kt Kt-Q 2 36 P x Kt Q 3Q ch Q R-K 1 B x 13 38 QK-tKt 2 B P QRelig3nsch(t

18 B-B 3 B-B 3 (a) Bronstein says he thought of this at breakfast, bd, there are traces of vodka in it to me.

(b) 9 . . . P-Q Kt 4; is an alternative giving Black mote freedom at cost of loosening his position: I do not knew whether or not it is better. (c) Better 12 . . Q-B 2 with the idea K Kt-Q 2 a P-B 3. If in reply 13 P-K 5, K Kt-Q 2; 14 Q-K 4 then

14 ... B-R 4; followed by 0-0-0 and R-K 1. 5

(d) 13 .. K Kt-Q 2; is imperative to prevent Kt-K 1 with idea 14 P-K 5, 0-0; 15 R-K 1, B-Kt 4. As plate" Black Q B gets shut completely out of the game. (e) This merely helps 'White. 20 . . P-B 3; followed by P-K Kt 4 making an attempt to *tight for the ceiltrit and black squares is the only chance. (f) Otherwise White (if be wants to) can win another pawn by Kt-Q 6. (g) 25 P-Kt 4 winning queen was threat—an illuirdeet-1 358 comment on Black's lack of space; 24 . . . B-R 4; Q-B 2 is equally bad for Black. (h) Necessary preliminary to retreat Q-Q 1 if be is to lose Q B P. (I) 31 P x B P. P x P; 32 Kt x P is less convielt, because of 32 . . . R-K Kt 11; 33 Kt x R, R

though it would also win. 7,

(1) Or 32 . . . B-Kt 1; 33 P-Q 6, R-K 1; 34- to rQe-siKgnta3ti;o3n5 35 x K BP and wins. Text is equivalent (k) 37 . P x Kt; 38 P-Kt 7 ch or 37 .. . R x Kt;

38 R-K B ch. lc 7,

(/) 38 ' Q Q ch; 39 K x 0, P x Kt; 40 K---tbe K-Kt 1; 41 P-Kt 7 and wins a rook. In this game White pawns seem to be worth a piece each.