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解説
小文字のxは相手駒を取る手を示します。では到着マスの直前に書き、Bxe5はビショップがe5の駒を取る手です。
ポーンの取りでは先に出発ファイルをaからhの文字で書きます。exd5はe列のポーンがd5で取る手です。xだけでは取られた駒種は分からず、局面から判断します。
追加情報は後ろに付きます。なら+、なら#で終わり、もあればexd8=Qのように新しい駒を到着マス後に書きます。
Portable Game Notation (PGN)の標準形式はxを必須とします。FIDEの手書き棋譜では省略できますが、残すと曖昧さが減り、ソフトが解釈しやすくなります。
よくある混同
取られた駒
xは取りがあったことを示しますが、盤から除かれた駒名は示しません。
ポーンの取り
exd5ではeが出発ファイル、d5が到着マスです。
出典
- 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