Capablanca excelled in simple positions and endgames, and his positional judgment was outstanding, so much so that most attempts to attack him came to grief without any apparent defensive efforts on his part. But he could play great tactical chess when necessary—most famously in the 1918 Manhattan Chess Club Championship tournament, when Marshall sprang a deeply analyzed on him, which he refuted while playing under the normal time limit (although ways have since been found to strengthen the Marshall Attack). He was also capable of using aggressive tactical play to drive home a positional advantage, provided he considered it safe and the most efficient way to win, for example against Spielmann in the 1927 New York tournament.