6.Qe2This move does not seem to have been played yet at this juncture.
9…exd4If he plays 9) ..., B - Kt 5 at once, White likewise answers 10) R - Q 1, and either the same variation would result, or White would have the choice between P - K R 3 and P - Q 5. In one case he would have the Bishops, in the other he would divide Black's Pawns into two different groups.
11.Rd1White threatened P - K 5 and B - Q 5.
14…f6At this point this advance is faulty. He should have played Kt - R 4 first. Then if 15) B - B 2, he could play P - K B 3, although there was no hurry for this, as White's Pawns are still far back and do not yet threaten to advance.
15.h3The decisive answer. Now White carries Black's King's wing by assault.
17.e6Every move has to be carefully timed. It was dangerous to give Black the square Q 3; moreover the question had to be asked: will White be able to establish communication with the Pawn at K 6 by P - K B 4?
19.Nxg6This exchange was necessary.
27…Qe6Black resigned before White had moved, as he saw that R x P ch would be immediately fatal.
Emanuel Lasker, The International Chess Congress, St. Petersburg, 1909 (1910) · Public domain · source