Yates, Frederick Dewhurst VS Gunsberg, Isidor 1914.08.13

Annotations

1. 10.Be3 in order to exchange the Black Knight if played to B 4.
2. 11…Nxd2 This furthers White's development, and should not be played unless there is no other move available. To be considered are P-B 4 and B-K Kt 5. An argument against P-B 4 is that White can deprive Black's weak centre pawn of one protecting piece (12 P×P e.p., Kt×P (B 3)); 13 Kt-Kt 5, and experience has shown that White obtains the superior game.
3. 13…Nc4 A very dangerous manœuvre, as White can evade the exchange of his Bishop and the Black Kt does not get back in time for the defence of the K side, where White's attack becomes virulent. He should have played P-Q B 4 followed by Kt-B 3.
4. 17.Nd4 Black had probably anticipated that White would be content with regaining his pawn by B×P, but, with fine positional insight, he retains his Bishop for the coming onslaught and speedily concentrates his forces on the K side; whilst Black, who has won a pawn at the expense of several moves, cannot mobilise an equivalent number of pieces in time for the defence.
5. 18…Bd7 White was threatening 19 Kt-B 6, 20 Kt×B, 21 B-Kt 5, 22 B-B 6; 18...Q-Q 2 is not sufficient, as 19 P-B 5 would follow. Neither can 18...B-Q B 4 be played because of 19 B-Kt 5, Q-B 1; 20 B-B 6. Preferable to the text move seems B-K B 1 (19 B-Kt 5, Q-B 1; 20 B-B 6, B-Kt 2), as then the Black pieces have more freedom of action.
6. 20.e6 A brilliant sacrifice to which no satisfactory reply can be found. For instance, 20...P×Kt; 21 Q-Kt 4, Kt-K 6; 22 R×Kt, P×R; 23 P-B 5, B×P; 24 P×B, P×P; 25 B×P, etc.; or 24...R-K B 1; 25 P×P ch, R×P; 26 Q-K 6, Q-K 1; 27 B×P, etc.; or 23...P-Kt 4; 24 P×P ch, K×P; 25 Q-R 5 ch, K-Kt 1; 26 P-B 6, B×P; 27 B×P, etc.; or 21...B-B 4; 22 P×P ch, K×P; 23 B×P ch, P×B; 24 P-B 5, etc. There are many variations, all leading to a speedy end.
7. 23.Bxd3 If P×K P then 24 P×Kt P, Kt-K 4; 25 R×Kt, B×R; 26 Q-R 5, Q-B 3; 27 R×Q, B×R; 28 P×P ch, K-R 1; 29 Q-B 7, etc.; or 26...B×P; 27 B-B 8, etc.

Edward Lasker, Chess Strategy (1921) · Public domain · source