Editing Rules of chess (section)

===Recording moves===
{{Main|Chess notation|Algebraic chess notation}}
[[File:SCD algebraic notation.svg|left|thumb|200px|alt=Diagram showing how squares are named – columns are a through h, rows are 1 through 8|Naming the squares in [[algebraic chess notation|algebraic notation]] ]]
[[File:Planilha_Eisenberg_e_Capablanca.jpg|thumb|180px|A score sheet from a game by [[José Raúl Capablanca]], in [[descriptive chess notation|descriptive notation]]]]

Each square of the [[chessboard]] is identified with a unique pair of a letter and a number. The vertical {{chessgloss|files}} are labeled {{em|a}} through {{em|h}}, from White's left (i.e. the [[queenside]]) to White's right. Similarly, the horizontal {{chessgloss|ranks}} are numbered from {{em|1}} to {{em|8}}, starting from the one nearest White's side of the board. Each square of the board, then, is uniquely identified by its file letter and rank number. The white king, for example, starts the game on square '''e1'''. The black knight on '''b8''' can move to '''a6''' or '''c6'''.{{sfn|FIDE|2023|loc=appendix C}}

In formal competition, each player is obliged to record each move as it is played in [[algebraic chess notation]] in order to settle disputes about illegal positions, overstepping time control, and making claims of draws by the fifty-move rule or repetition of position. Moves recorded in any other systems of notation cannot be used in evidence in such a dispute. Other chess notation systems include [[ICCF numeric notation]] for international [[correspondence chess]] and [[descriptive chess notation]], formerly standard in English speaking countries. The current rule is that a move must be made on the board before it is written on paper or recorded with an electronic device.{{efn|In a variation of the rules, a USCF director may allow players to write their move on a paper {{chessgloss|score sheet}} (but not enter it electronically) before making the move.{{sfn|Just|2019|loc=chapter 1, section 15A (variation 1)}}}}{{efn|Before this was the rule, [[Mikhail Tal]] and others were in the habit of writing the move before making it on the board. Unlike other players, Tal did not hide the move after he had written it – he liked to watch for the reaction of his opponent before he made the move. Sometimes he crossed out a move he had written and wrote a different move instead.}}<ref>{{Harvcol|Timman|2005|p=83}}</ref>

Both players should indicate offers of a draw by writing "=" at that move on their score sheets.<ref>{{Harvcol|Schiller|2003|p=27}}</ref> Notations about the time on the clocks can be made. A player with less than five minutes left to complete all the remaining moves is not required to record the moves (unless a delay of at least thirty seconds per move is being used). The score sheet must be made available to the {{chessgloss|arbiter}} at all times. A player may respond to an opponent's move before writing it down.<ref>{{Harvcol|Schiller|2003|pp=25–26}}</ref>
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