. . "Schachkombination." . . "Chess Middle games." . . "Combinations: the heart of chess" . . . "Combinations : The heart of chess" . . . . "Combinations The Heart of Chess" . "Combinations The Heart of Chess"@en . . "Combinations" . . . . . . "Combinations : the heart of chess" . "Combinations : the heart of chess"@en . "An instruction guide to chess, focusing on combinative play, offering step-by-step explanations of pins and counter-pins, Knight forks, smothered mates, and other moves, including those used by master players." . . . . "Electronic books" . "Electronic books"@en . . . . "Combinations: the heart of chess"@en .