What, really, is a chess combination? It is a maneuver generally employing surprise and a sacrifice, in which pieces work together to bring about a sudden advantage. it is perhaps the most aesthetically satisfying and successful technique in the game. Some players beliebe that the combination is a spontaneous creation with no guiding laws ; the possibility springs up in the minde like a flash of genius. In this classic work, however, Znosko-Borovsky proves that combinations can be studied.