The outcome of most matches depends on positional skills; the first player to establish a positional advantage gains the best chance of a successful direct attack. This complete guide, written by a grandmaster, can assist all players at every level in developing a more powerful strategic game. Spanning more than a century of chess, it presents examples on such themes as key squares, bad bishops, and pawn structures in ascending difficulty, with ample cross-references. 495 b/w illus.