Why do they take a paper and write notations are movest they have I played.

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pt22064

USCF also requires players to record their moves either on paper or using an approved electronic device. If you played in an official tournament, then you would have been required to record your moves.

breakerofwind wrote:

 It's required.  Fide Laws: 

 8.1 In the course of play each player is required to record his own moves and those of his opponent in the correct manner, move after move, as clearly and legibily as possible, in the algebraic notation (See Appendix C), on the scoresheet prescribed for the competition.