St. Petersburg 1909, Game No. 113. Lasker: "White played the whole game with extraordinary power, and occasionally with subtlety."
11…Rd8This mode of development offers no good prospects. He should first settle the question on the Queen's wing; therefore, 11) .... Kt X Kt; then if 12) P X Kt, P - Q Kt 4; 13) B - Q 3, P - Q R 3, to be followed by P - Q B 4; also after 14) P - B 4, P - Q B 4 would be feasible.
13…Nb6Not a favorable square for the Knight. In any case, it would have been better to exchange the Knights, in order to follow with 14) P X Kt, B - B.
19.Qa5He makes this attack, as now 19) Kt - B sq would fail on account of 19) P - Q 5, which seems promising, would, after 19) K P X P; 20) P X P, K - R sq lead to no decisive advantage.
21.d5White opens the centre, as the exposed position of Black's King now invites an attack.
23…Rxd5The exchange is always lost: e. g. 23) .... P X P; 24) B - R 4, P - Kt 3; 25) Q - R 6, R - B 2 or Kt 2; 26) Kt - B 5.
Emanuel Lasker, The International Chess Congress, St. Petersburg, 1909 (1910) · Public domain · source