How to play
Classic: alternate placing X and O. Fill the board with no line and it's a draw.
Orbit: each player may hold at most three marks. When a player with three marks places a fourth in an empty square, their oldest mark is removed before a win is checked.
- Occupied squares — including the expiring (oldest) one — cannot be clicked.
- The next player's oldest mark fades and shows a badge when they hold three.
- Win: three of your marks in a row, column, or diagonal.
- Orbit draw: the exact same position (board, mark order, and turn) repeats three times, or 80 moves pass.
Keyboard: ←↑→↓ move, Enter/Space place, 1–9 quick place.