Play Nim against the computer.

You can remove any number of matches, but ONLY from one row.
Select any 'Row button' and click it to REMOVE matches.
After each move click 'PC move' to make the computer play.
You win if you leave the LAST match for the computer.

Who Moves First
You have the first move, unless you allow the computer to play first by pressing the 'PC move' button.