Editing Openai/692664f7-a230-8000-833c-663a29f9f4d1 (section)

=== Record a Double Move with an appended “(D)” on the line where the player executed two plys in a single turn, and mark the skip in the opponent’s score sheet as “skip (S)”. Example: ===
* 25. ... Rg8 (D): means Black on move 25 used a Double Move (played two plys in that turn).
* When a player spent a Sacrifice Token on their previous turn, annotate that earlier move with “→D” or “spent:ST” so future readers know a Double Move was granted and when the skip will occur.

Example short-hand:
* “White 18. Qe2 (spent ST)”
* “Black 18... Nf6, g5 (D)”
* “White 19. — (skipped) S”