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解释
当一手棋使对方王受到攻击时，要在着法末尾加上 +。这种状态称为将军，被将军的一方必须以合法着法解除攻击。
例如，Qe3+ 表示后移动到 e3 并将军。+ 描述的是局面的客观事实，并不像感叹号那样赞扬这步棋。
Standard Algebraic Notation (SAN) 是 使用的棋子字母和格名记录体系。在 SAN 中，+ 是着法的一部分。在国际棋联 (FIDE) 的比赛记谱表上，这个符号可以省略。即使两枚棋子同时将军，SAN 仍只写一个 +； 的含义取决于所用惯例。
如果王没有任何合法应对，这步棋就是将杀，应使用 而不是 +。
常见混淆
将军与将杀
+ 表示至少存在一种合法防守，# 表示不存在任何合法防守。
查看术语将军与好棋
+ 只说明王受到攻击，并不表示这步棋是好棋、坏棋还是显而易见的着法。
来源
- 1.FIDE Laws of Chess taking effect from 1 January 2023, FIDE
- 2.Appendix C. Algebraic Notation, FIDE Rules Commission
- 3.Standard: Portable Game Notation Specification and Implementation Guide, rec.games.chess contributors; coordinated by Steven J. Edwards