6.e4It would be interesting to try, at this point, Kt - B 2, e. g.: 7) B - K 4, Kt - Q 2; 8) B - Q 4, P - K 4; 9) Q - Kt 3, Q - B 3; 10) Kt - Kt 3, B - Kt 3 would soon lead to complications.
7.Nc3If 7) ..., P - Q R 3; 8) P - K 5, Kt - Q 4; 9) P - K 6, Black's position would be quite unfavorable. But 7) ..., P - K 3 was sound play.
9.Nf5Not Kt - B 3 on account of 9) ..., B - Kt 5.
13.Be3This Bishop is now master of the situation.
17.Bxc5It is, no doubt, advantageous for the development of White's King that this square should be cleared, but, nevertheless, White should have preserved this Bishop. 17) Q R - Q sq would, at least, have done no harm, for after 17) ..., Kt - K 3; 18) Kt - Q 5 the strong position of Black's Knight at K 3 would be compensated for by that of White's Knight at Q 5.
18…Nc6A mistake, since the Knight impedes the Rook. He should have played 18) ..., R - B 2, to be followed by O - O.
22.f4The isolation of the King's Pawn is of great importance, as White has afterwards an unassailable post for his pieces at K 4.
44.Nb7Rubinstein's conduct of this end game is most pleasing.
Emanuel Lasker, The International Chess Congress, St. Petersburg, 1909 (1910) · Public domain · source