Two players · One board · Perfect information

NIM.

Choose your cells. Think a few moves ahead. Whoever claims the last empty cell wins.

Only the rational player wins. Unless both players are rational. Then who really wins? ;)

Up next

Player X

21Cells remaining

The board · 21 cells

Select 1–3 neighboring empty cells. Scroll horizontally on small screens.

Player X: select one, two, or three adjacent cells.

How to play

Simple rules. Interesting choices.

Start with 21 empty cells and two players: X and O.
On your turn, mark one, two, or three consecutive empty cells, anywhere on the board.
Press Enter to confirm your selection and pass the turn.
The player who fills the last empty cell wins.

Match record0 moves