4…c6The defence, which limits Black's forces to a small ground, always fails in consequence of the advance of White's King's Pawn to the 4th square later on.
7…dxc4This exchange facilitates the advance of the King's Pawn.
12…c4White's Centre has now a threatening attitude, but after 12) .... P x P; 13) Kt x P, O - O; 14) B - Kt 5, White would equally have the superior game.
14…Re8He ought to have pushed at once 14) .... P - Kt 5, driving away the White Knight, before he could be played via K 4 to Q 6 (which manoeuvre was adopted several times by Steinitz against Tschigorin), with the likely continuation: 14) .... P - Kt 5; 15) Kt - Kt sq, R - Q B sq; 16) Kt(B 3) - Q 2, B - B 3; 17) Kt x P, Kt x P.
23.Qf3Hereby the game is decided in White's favor. This result was rendered almost certain by the strong and unassailable position of the White Knight at Q 6.
Emanuel Lasker, The International Chess Congress, St. Petersburg, 1909 (1910) · Public domain · source