Pqr

The Barcza half of the defence.

7 B-K2 BxN

Black exchanges at once, consistent with his plan of getting on to e5.

To answer 9 P-R5 with 9 . . . P-QN4, but being rather casual about getting his pieces moved off the first rank.

Following the recipe of Gligorii, who got to c4 via a3.

11 R-Kl

Setting a devilish trap and just willing the black knight to e5.

N-B4 0-0 13 B-B4 N-Kl 14 Q-K2 B-B3 15 R-R3! P-QN4 16 NxP NxN 17 BxN R-Kl (17 . .. BxP 18R-K3!) 18R-K3 RxR 19QxR with a winning position is an example of the difficulties Black finds himself in. However, the move played is nicely dealt with by Karpov.

A beautiful sacrifice which makes the absolute maximum of the natural resources in the position. 12... PxR

13 P-Q6

The start of something big - this pawn goes down in a blaze of glory to open not only the bishop's diagonal but also the file for the queen.

13...R-B1 14 PxB Q xP 15 N-B4 or 13 . . . R-R2 14 B-B6+ are clearly good for White. 14B-B6+ This zwischenschach puts out any ideas Black may have had of castling.

14 . . . K-K2 would have enabled Karpov to show how rich in possibilities this deceptively simple position is e.g. 15 B xR QxB 16 N-B4 Q-B3 17 Q-K2! and then:

(a) 17 . . . K-B3 18 P-QN3! N-K2 19 B-N2 N-N3 20 P-B4! R-Kl (20.. .NxP21 BxP+) 21 PxP+ NxP 22 R-KB1+;

(b) 17 .. . K-K3 18 Q-N4+ K-B3 19 Q-N5 + K-K3 20 Q x NP;

(cl) 18 . . . Q-Q4 19 NxNP Q~ Q5+ 20 K-Rl N-R3 21 P-B3 winning the queen in mid-board. (c2) 18 ... K-K3 19 P xP B xP 20 B-B4 Q-B2 21 R-Kl.

In every case the exposed black king, left in the centre because of Black's slow development, is the cause of the trouble.

15 BxR QxB

16 N-B4 B-B2 Forced, to cover the QNP, but now White gets ready to soften up the QBP.

17 B-K3! Preparing his next move.

17 . . . Q-B3 is nicely met by 18 P-R5! P-QN4 19 NxP BxN 20 Q-Q8 + Q-Kl 21 BxP+ N-K2 22 BxN+.

18 P-R51

Black has already been severely punished for his time consuming and weakening eighth move which resulted in:

(a) a weakening of the hl-a8 diagonal;

(b) a retarded development with his king stuck in the centre; - and now we have

(c) the break up and destruction of the weakened Q-side pawn chain.

If 18 ... P-QN4 (18 ... Q-B3 19 PxP BxP 20 RxP wins at once)

19 N-N6! BxN (19 . . . Q-B3 20 BxP K-Kl -not 20... QxB?? 21 JV-Q7H--still leaves Black helpless) 20 PxB P-B3 21 Q-Q7 K-B2 22 BxP R-Kl (or if here 22 . . . Q-Ql 23 R-Ql Q xQ 24 R XQ R-K1 25 RxN+! and the QNP is decisive) 23 P-N7 Q-Nl 24 RxP with 25 R-R8 to follow.

A blunder, overlooking White's tactical reply, though Black is lost anyway as the following lines show:

(a) 19... Q-Bl 20Q-Q5! K-KI 21 N-Q6+ BxN 22 QxB N-B3 23 RxP!;

(b) 19... Q-Kl 20 Q-B3! K-Nl 21 Q-N7 Q-B3 22 NxRP! QxQ (22 ... BxN 23 Q xN) 23 N xQ N-N3 24 R X P and the connected passed pawns are too strong.

20 NxKP!

20 ... BxN 21 Q-Q8+ Q-Kl 22 BxN-)- and it's time to put the pieces back in their starting positions.

Protecting his knight which was now threatened, and preparing the entry of the white rook.

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