Book excerpt: International Chess Master Jeremy Silman tests a player's strengths and weaknesses with 131 problems that cover openings, middlegames (both positional and tactical), and endgames. As a player completes a problem, he or she may then turn to consult Silman's lengthy answer to the problem, which is always detailed yet never dry. Through this process of problem solving, analysis and advice, a player is led to discover the major flaws imbedded in his or her play. Through this same process, a player is also led to an understanding of Silman's system of thinking about the game, and how it differs from many other systems of chess thinking.