This is a well-established training manual which encourages the average player to understand how a grandmaster thinks, and even more important, how he works. Ko

Alexander Kotov's trilogy, of which this is the second volume and now available in digital format for the first time, marks a landmark in chess literature. For

• Learn the calculation secrets of the world's best attacking players • First book from one of the UK's biggest chess stars • Illustrated with a wealth of

Looks at the art of chess calculation, describing when a player should calculate, how to discover moves, and how much time to spend on critical moves.

Have there been times during a chess game when you have calculated for half an hour, only to find that most of what you were thinking was of little use? This bo