Play / Nim

Nim

Your move. Take any number of counters from one heap; whoever takes the last wins.

Start from 3-4-51-3-5-75-7-9

First move

You Engine

New game

You move first. The engine plays Bouton's nim-sum perfectly; from 3-4-5 and 5-7-9 the first player can force a win, from 1-3-5-7 the first player is lost. The strategy article shows how.