TraitcraftQuarto Duel

You choose your opponent’s piece. They place it in any empty square, then choose a piece for you. You can’t change the piece you receive.

Win immediately by completing a row, column or either long diagonal of four pieces that share at least one trait: round or square, ivory or gold, short or tall, solid or hollow. Other traits can differ. A full board with no shared line is a draw.

The computer takes immediate wins and tries to give safe pieces. All 16 pieces are unique. Small trait marks and accessible names accompany their shapes. Tap or Tab + Enter to choose and place. Undo returns to your previous decision. Progress is saved on this device.