Chameleon is played on a 5×5 board with the following setup:

Players take turn to move one of their or :

• A moves like a chess knight or a chess king
• A moves like a chess bishop or a chess king

Both units capture opponent units by replacement.

Here's the twist:

• When you move from a light square to a dark square or vice versa, the unit will become a
• When you move from light to light or dark to dark, the unit becomes a

This can also be phrased like this:

• A becomes a when it takes a diagonal "king" step
• A becomes a when it takes an orthogonal "king" step

There are three win conditions:

• persistentInvader: if you move a unit into the opponent's base, and she cannot kill it in her subsequent turn, you win!
• loneInvader: if you have only 1 unit left and move it into the opponent's base, you immediately win even if the unit can be subsequently captured.
• starvation: if you kill all opponent units, you immediately win

Draws are not possible, nor are long games!