12…Qd7Of course not P x Kt because of 13) B x P ch and B x Kt.
16.Bg5Best. White cannot play R - Q on account of Kt - K Kt 5.
36…Kh8It would have been better to play the King via B, K 2 to B 3.
79.Kd7White has played the ending in grand style. In addition to the error of his 36th move, Black has committed the other one, to approach the hostile Pawn too closely with his King.
Emanuel Lasker, The International Chess Congress, St. Petersburg, 1909 (1910) · Public domain · source