Fortress (chess)

（重定向自Defense perimeter）

In chess, the fortress is an endgame drawing technique in which the side behind in material sets up a zone of protection around their king that cannot be penetrated by the opponent. This only works when the opponent does not have a passed pawn or cannot create one, unless that pawn can be stopped (e.g. see the opposite-colored bishops example). An elementary fortress is a theoretically drawn (i.e. a book draw) position with reduced material in which a passive defense will maintain the draw (Müller & Pajeken 2008:183).

单词	Defense perimeter
释义	Defense perimeter 原声例句 CRI在线 2014年5月合集 Instead, the South Korean side says its working on creating its own missile defense perimeter. 相反地，韩国方面表示正在建造自己的导弹防御周界。英语百科 Fortress (chess) （重定向自Defense perimeter） In chess, the fortress is an endgame drawing technique in which the side behind in material sets up a zone of protection around their king that cannot be penetrated by the opponent. This only works when the opponent does not have a passed pawn or cannot create one, unless that pawn can be stopped (e.g. see the opposite-colored bishops example). An elementary fortress is a theoretically drawn (i.e. a book draw) position with reduced material in which a passive defense will maintain the draw (Müller & Pajeken 2008:183).
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