Take the last counter
Take one, two or three counters; whoever takes the last wins.
YOUR TURN
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Your saved comparisons
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Share your setup
Try it together.
Share the page, or choose to include your setup. Entered names are always omitted from team-picker links.
How it works
How it works.
Try a move or submit your prediction. Check the explanation after playing.
Assumptions and limits
Single-pile normal-play subtraction game. The computer uses the exact winning strategy when available.