Chess 446

PHILIDOR

H. Ahues (1st prize, Die Schwalbe, 1965). White to play and mate in two moves; solution next week.

Solution to no. 445 (Pauly): R - B 11, A 1 K-Q 3; 2B-B 3!,K x R; 3 B-K 5.81 ... K - Q 5; 2 Kt - B 3!, K x R; 3 Kt (3) - Kt 5.

C 1 K,-,K 5;2 Kt - B 3 ch, K - B 5; 3 R -K 111 (2 K - Q 5; 3 Kt - K 6). D 1 K - B 4; 2 R -K 1, K - Kt 4; 3 R -K 5. Beautiful problem with key conceding two flights and self-inter- ference sacrifices in A and B on the second move.

The following lively game was won by one of the leading young German players; it is a good example of the exploitation of weakness on squares of one colour.

White, Dueball. Black, Stoppel. Opening, French Defence. (Berlin 1969.) 1 P-K 4 P-K 3 2 P-Q 4 P-Q 4 3 Kt-Q B 3 Kt-K B 3 4 B-Kt 5 B-Kt 5 The MacCutcheon variation; enterprising, but probably not quite so good as 4 . . . P x P or 4 . . . B - K 2.

5 P-K 5 P-K R 3 6 B-Q 2 B x Kt

7 P xB Kt-K 5 8 Q-Kt 4 P-K Kt 3 Black's trouble is that if he plays K - B I he has to face a severe attack starting P - K R 4 and R - R 3 - Kt 3; on the other hand, playing as he does, he is weak on the black squares.

9 B-Q 3 Kt xB 10 K x Kt P-Q B 4 11 Kt-B 3 Q-B 2 12 Q-R 4 . •

Not 12 Q - B4 at once because of 12 . . . P - B 4/

12 ... Q-K 2 13 Q-B 4 B-Q 2? Natural but wrong; he should play P-B 5, when it will be difficult for White to break through.

14 P x P! QxP An instructive position; White's broken pawns cannot be readily exploit- ed by Black and the open lines and black square control give White a powerful attack.

15 Kt-Q 4 P-Q R 3 15 . . . Kt-B 3? /6 Kt-Kt S 16 Q R-Q Kt 1 Q-B 2 If P-Q R 4, White will force an entry in due course by P-Q R 4.

17 Q-B 6 R-Kt 1 18 P-K R 4 B-B 1? Hastening the end; relatively best was 18 . . . Kt - B 3 but then 19 Kt x Kt, B x Kt; 20 P - R 5 will win a pawn. 18 . B - B loses to 19 Kt x P!

19 P-R 5 Kt-Q 2 The idea of the pre- vious ntove.

20 Kt x P! Q-R 4 20 . . . P x Kr; 21 Qx P ch, K-B 1; 22 I)/ P, Ki x P; 23 Q-B 6 ch, K-KI; 24 Q R-K I and White wins.

21 Kt-Kt 7 ch K-B 1 22 (2-(;) 6 ch! K x Kt

23 PxP Q-Q I 23 . . . P x P loses at once to 23 Q-K 7 ch and 23 . . . Q-B 4; 24 PxP, QxP ch; 25 K-Q I, R-R 1; 26 P-K 6 also wins for White.

24 PxP Q-Kt 4 ch 25 P-B 4! QxB Pch

25 . . . Q x Kt P ch; 26 B-K 2 is equally useless 26 K-Q I R-R 1 26 . . . Q xB 11??; 27

Q x R P mate.

27 Q-Kt 6 ch K-B 1 28 R-Kt 4 Q-K 6

28 ... QxK P; 29 R-K I.

29 Q-Q 6 ch K r, P 30 R-B 1 ch K-K 1

31 P-K 6 Resigns White threatens 32 B-Kt 6 ch, K-Q 1; 33 P-K 7 mate and if 31 . . Kt-K 4; then 32 Q R-K 13 4.

Today, the four-a-side Clare Benedict tournament starts at Adelboden in Switzerland with W. Germany (holders), Spain, Holland, Switzerland, Austria and ourselves competing. Our team-1. Dr. J. Penrose 2. R. Keene 3. W. R. Hartston 4. P. N. Lee with C. H. O'D. Alexander as captain —is the youngest and best that we have ever entered for the event: I hope its performance matches its promise