One player is Order, the other is Chaos. Order moves first.
- Pick a square. Tap any empty square. Tap another to change your mind.
- Choose X or O. Both players may play either symbol. Pressing X or O places it.
Order wins as soon as five identical symbols line up across, down or diagonally, no matter who placed them.
Chaos wins if the board fills up without five in a row.
House rule: six in a row also counts as a win for Order.
You swap roles every round. Each round you win scores a point, in either role.
Keyboard: arrow keys move the selection, X or O places, Esc clears the selection, Ctrl+Z undoes.