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Endgame study
An endgame study, or just study, is a composed chess endgame position—that is, one that has been made up rather than one from an actual game—presented as a sort of puzzle, in which the aim of the solver is to find a way for one side (usually White) to win or draw, as stipulated, against any moves the other side plays.
==Overview==
To the extent that they are composed positions and offer the solver a specific task, endgame studies are similar to chess problems in which the stipulation is to "checkmate black in two moves against any defense," for example. However, while problems often present very artificial looking positions, studies often appear that they could occur in a game.
As with problems, for a study to be regarded as a good one, it must have only one solution. Some argue that White must have only one move at each juncture to achieve his aim, though some feel that minor alternatives (such as a choice of moving a knight b1–c3–b5 or b1–a3–b5) are permissible.
Various methods of classifying studies have been attempted; a commonly used indexing system is the GBR code.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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