The student ought to have realised by this time the enormous importance of playing well every kind of ending. In this game again, practically from the opening, White aimed at nothing but the isolation of Black's Q P. Once he obtained that, he tried for and obtained, fortunately, another advantage of position elsewhere which translated itself into the material advantage of a Pawn. Then by accurate playing in the ending he gradually forced home his advantage. This ending has the merit of having been played against one of the finest players in the world.

GAME 10. PETROFF DEFENCE

(St. Petersburg, 1914)

White: J. R. Capablanca. Black: F. J. Marshall

1. P - K 4 P - K 4
2. Kt - K B 3 Kt - K B 3
3. Kt × P P - Q 3
4. Kt - K B 3 Kt × P
5. Q - K 2 Q - K 2
6. P - Q 3 Kt - K B 3
7. B - Kt 5

Played by Morphy, and a very fine move. The point is that should Black exchange Queens he will be a move behind in development and consequently will get a cramped game if White plays accurately.

7. ........ B - K 3

Marshall thought at the time that this was the best move and consequently played it in preference to Q × Q ch.