Action is the essential basis on which the game of
chess is founded and any action which contains a threat - i.e. attack
in its widest sense - stands out as a prominent feature of the game. To
the outside observer, a chess game is dominated by the conflict between
the two players. The ultimate aim of each player is, as a rule, the
mating of the opponent’s king, and an action with this aim, whether it
is direct or indirect, is called an attack (in a narrower sense of the
word) or a mating attack; that is the subject of this book.