Capablanca–Janowski, St. Petersburg 1914, an Exchange Ruy Lopez in which White's knight on the central d5-square becomes “a tower of strength.” Capablanca's own notes from Chess Fundamentals (1921), now public domain, follow.

1. 5.Nc3 I played this move after having discussed it with Alechin on several occasions. Alechin considered it, at the time, superior to P - Q 4, which is generally played. He played it himself later on in the Tournament, in one of his games against Dr. E. Lasker, and obtained the superior game, which he only lost through a blunder.
2. 5…Bc5 P - B 3 is probably the best move in this position. I do not like the text move.
3. 7…Bxe3 This opens the K B file for White, and also reinforces his centre, but Black naturally did not want to make a second move with this Bishop.
4. 9…O-O-O Bold play, typical of Janowski.
5. 10…Nh6 The problem for White now is to advance his Q Kt P to Kt 5 as fast as he can. If he plays P - Q Kt 4 at once, Black simply takes it. As a matter of fact White played a rather unusual move, but one which, under the circumstances, was the best, since after it he could at once play P - Q Kt 4 and then P - Q R 4 and P - Kt 5.
6. 13…Bxf3 He simplifies, hoping to lighten White's attack, which will have to be conducted practically with only the heavy pieces on the board.
7. 14.Rxf3 Taking with the Pawn would have opened a possibility for a counter attack.
8. 18.c4 The White Knight is now a tower of strength. Behind it White will be able to prepare an attack, which will begin with P - Q 4, to drive away the Black Queen and thus leave himself free to play P - B 5.
9. 20…Rd7 Had White on his 19th move played K R - B 1 instead of R - B 2, Black could have played now, instead of the text move, R x Kt; K P x R, Q x P ch; followed by Kt - B 4 with a winning game.
10. 21…Kb7 It would have been better for Black to play K - Q 1. The text move loses very rapidly.