Chess

BY PH ILIDOR

No. 46 M. LIPTON (1st Prize, MeWilliam`Under 21 Tourney ,I955)

BLACK (8 men)

WHITE (10 men)

WHITE to play and mate in two moves: solution next week.

Solution to last week's problem by Hawes and Ravens- croft: Q x P, threat Q-K 5.. 1 . . . Kt-Q 5; 2 Q-B 8.

Games with attacks on opposite wings are usually interesting and instructive and—even more than most games—usually won by the stronger player. This week's game is an example: at the beginning of the middle game White's chances are as good as, or better than, Black's, but two errors—one positional, one tactical— cost him first the initiative, then the game.

White, DONNER Black, PACHMAN

(Holland) (Czechoslovakia)

Opening, English. (From the 1955 match)

As played, he fails to block K side, with fatal results. queen's side.

of Kt capture on Kt 6 or B 5, followed by Q sacrifice and Q X Kt! P-Q 13 4; 2 Kt-Q B 3, Kt-Q 133.

White gets pressure on Q 8 file, White squares and keeping his bishop alive.

W Q Row 'protects K P. White should reply to text with 26 R-R 3, R-R I leaves White even more tied up, irpossible. mate by 2 rooks.

against text than he does by 30 ... Kt x B PI; 31 R x Kt, fice: Black's 36th move deals with threat completely.' 43 K-B 3, Q-Q 8 mate. pressure, Black counters on King's side: there is a similar 20P-Kt5 QRP x P

variation, with colours reversed, in Sicilian 1 P-K 4, moves), but this is now met by Kt-K 4! P-K B 4, followed by P-B 3, is it tempting alternative to text; as played, 18 P-K Ft. 3!, P-K R 4; 19 K-R. 2!, P-R 5; 20 P-Kt '4. K Kt 5.

better to insert P x P first, Black could win even quicker

18 P-Q R 4? P-K R 41 10P x Kt Kt-B3 If B-Kt 2 0-0 12 0-0 11-R 6 13 R-B 1 B x 14 K x B Q-Q 2B

15 P-Q 4? (c) 1'-K 51

16 P-B 4 Q-B 4

17 Q-Kt 3 P-Q R 3 (d)

19 B-R 3 P-R 5 2 Kt-Q B3 Kt-Q B 3 (a) 22 P x P

9 K Kt -B 3 Kt x Kt (b)

4 P--K Kt 3 P-K Kt 3 24 Kt-K 2

8 P-Q Kt 4 Q Kt-K 2

3 P-K 3 P-Q 3 23 K R-B 2

5 B-Kt 2 13-Kt 2 25 K-R 2 (f) 6 K Kt-K 2 B-Q 2 26 R-Kt 2

7 Kt-Q 5 Q-B 1

1 P-Q B 4 P-K 4 21 RP x P (e) If) Otherwise Black plays B-R 5. 25 R.-K R 1, K-Kt 2; (e) Slightly better 21 Q x P with more pressure on (g) From now on White is constantly menaced by threats (d) Otherwise 18 Kt-Kt 5, Kt x P; 19 Kt x B r as (h) New threat, of Kt-K 13 3 and later emergence in (i) Useless but so are other moves: it might be a shade (J) Mate in two follows Mid 32 R x Q?

(1) 41 K-Q 3, Q-Kt 6 eh; 42 K-K 2, R(1)-R 7 ch;

(a) In this line, White aims to build up Queen side (b) Black wants to play P-Q 11 3 (hence his two previous (e) Very weak: he should play P-K 4, strengthening

(k) Last fling trying for perpetual check by rook sacri-

40 K-B 4 Q-R 5 ch

41 Resigns (1)

27 K-Kt 1 R-K R 21 29 R-B 1 B-Q 1 (h) 38 K-Q 2 Q-Q 8.ch

28 P-Kt 6 (g) R(R 1)-R 1

30 R(B 1)-B 2 (1) Kt x Kt P 39 K-B 3 B-K 8 eh 31 Kt x Kt Q x Kt 32 K-B 1 (j) R-R 8 ch 33 K-K 2 Q-R 6 34 Q-B 2 13-R

35 Q x KP (k) B x R

36 R x P ch K-B I 37 P x P Q-B frch

Q-Kt 5 P x P. Kt-R 4 ' B-B 3! K-Kt 2 R-R 1 '