Endgame study

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In the game of chess, an endgame study, or just study, is a type of chess problem that starts with a composed position—i.e. one that has been made up rather than played in an actual game—where the goal is to find the essentially unique way for one side (usually White) to win or draw, as stipulated, against any moves the other side plays. If the study does not end in the end of the game, then the game's eventual outcome should be obvious, and White can have a selection of various moves. There is no limit to the number of moves which are allowed to achieve the win; this distinguishes studies from the genre of direct mate problems (e.g. "mate in 2"). Such problems also differ qualitatively from the very common genre of tactical puzzles based around the middlegame, often based on an actual game, where a decisive tactic must be found.