RN

Again 39 Q-B2 was better here. The variations arising from that I analysed at home because they could have a bearing on the adjourned position.

39 . . . Q-K2 40 N-B5 PxN 41 PxP R1-R7 (41 . . . Q-B3 42 N-N4 Q-N4 43 R-N2±) 42 P-B6 Q-Kl 43 R-Bl N-R3 44 R-N5 (preventing the bishop from going to . . . KB4) 44 . . . Q-B2 45 K-Nl B-B4 (45 . . . N-B4 46 N-N4; 45 . . . P-K5 46 Q-R4 Q-B3 47 R-Bl) 46 Q-N6 (The tempting 46 RxB Q-N3+ 47 K-Rl NxR 48 BxN RxQ 49 B-K6+ Q-B2 50 N-N4 unfortunately does not work because of 47 . . . R xB 48 R xR R-R8+).

It is clear that 45 . . . B-Bl is preferable (instead of 45 . . . B-B4): 46 N-Bl RxB 47 RxR RxR 48 QxR QxBP 49 R-N2 N-N5 50 N-K3 P-R4 (50 . . . NxN 51 QxP+ KxQ 52 P-N8=Q+) 51 NxN BxN 52 Q-B2 KxP 53 Q-K3 and White's position is slightly better.

Instead of 39 . . . Q-K2, 39 . . . Q-B5 deserves consideration. Also in this case it seems possible to play 40 N-B5 QxQ 41 RxQ PxN 42 PxP and, with P-B6 to follow, White sets his opponent difficult problems. If Black prevents this then the following piquant ending arises: 42 . . .R1-R7 43 N-N4 KxP 44 N-R6+ and all the king's retreats lead to mate. If he plays immediately 41 . . . R1-R7, then 42 N-K3 in conjunction with N-B3-N5-K6, also gives White the advantage.

Finally, I was aware that all the preceding variations were similar and required further checking.

41 R/QN1-KB1

The sealed move. In the adjourned position, despite White's extra piece, Black already has some advantage.

Move by move Black introduces threats, each time forcing White to make practically the only reply.

44 R1-KB1 KxP

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