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

=== - Spend Sacrifice Token on your turn → opponent gets Double Move (2 plys) next turn. ===
* You (the granter) have your next turn skipped (you lose 1 ply).
* Net: move parity preserved; opponent gains timing and you pay a future turn.
* Restrictions: can’t spend while in check; double-move legality rules apply; checkmate ends the sequence immediately.

If you want, I can:
* Create a printable one-page rule sheet / score sheet template that includes columns for “ST used / scheduled skip / Double Move pending” (PDF or printable image).
* Produce a short sample game (10–20 moves) played under SDM rules to show strategic uses.
* Tweak the balancing parameters (e.g., token = 0/1/2, change penalty to material rather than skip) and run through examples for each.

Which of those would you like next?