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Initiative (chess)
Initiative in a chess position belongs to the player who can make threats that cannot be ignored. He thus puts his opponent in the position of having to use his turns responding to threats rather than making his own.〔http://chess.about.com/od/reference/g/bldefini.htm〕 A player with the initiative will often seek to maneuver his pieces into more and more advantageous position as he launches successive attacks. The player who lacks the initiative may seek to regain it through counterattack.
==Discussion==
Due to moving first, White starts the game with the initiative, but it can be lost in the opening by accepting a gambit. Players can also lose initiative by making unnecessary moves that allow the opponent to gain tempo, such as superfluous "preventive" moves intended to guard against certain actions by the opponent, that nonetheless require no specific response by them. The concept of tempo is closely tied to initiative, as players can acquire the initiative or buttress it by gaining a tempo.
The initiative is important in all phases of the game, but more important in the endgame than in the middlegame and more important in the middlegame than in the opening . Having the initiative puts the opponent on the defensive.
Grandmaster Larry Evans considers four elements of chess: ''pawn structure'', ''force'' (material), ''space'' (controlling the center and piece mobility), and ''time''. Time is measured in tempi. Having a time advantage is having the initiative . The initiative should be kept as long as possible and only given up for another advantage .
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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