An investigation of the main reasons why chess players sometimes go astray - the seven deadly chess sins: Drifting (losing the plot); Perfectionism (leading to time trouble); Egoism (overestimating your chances); Failure to spot the critical moment; Deafness (failure to listen to intuition); Dogmatism (failure to think creatively or dynamically); and Attachment (to particular ideas). This is a thought-provoking look at the psychological errors that lead chess-players to disaster and keep them from reaching their full potential.