A scoresheet problem is easier to fix when noticed early and handled calmly. Avoid guessing a long missing sequence.

What to do

Compare the current board with your last reliable recorded position. Follow the event’s procedure for requesting help or reconstructing moves, and keep the playing situation clear for the arbiter.

A mistake to avoid

Do not change the opponent’s record or disturb the board to solve the issue yourself. Ask for the appropriate procedure in a formal event.

A detail worth checking

Check the scoresheet at natural moments during training so mistakes are found while memory is fresh. The goal is a reliable record; hurriedly inventing a missing move can make the reconstruction less accurate.

Try this practical check

During a training game, deliberately omit one move from a copied score. Reconstruct it from the surrounding position and note why early checking helps.

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Reference and further practice

FIDE Laws of Chess