Wada Tiles: Color Pair Puzzle

Two tiles match only when their colors AND their pattern are identical. That sounds easy — until the decoys arrive: the same two colors swapped, or the same shape turned a quarter. Your eye says pair. It isn't. Every board is drawn from the palettes of Sanzo Wada, the Japanese artist whose 1930s color dictionary still guides designers today. ARCADE — endless waves against a countdown, with special tiles that help you or haunt you. ZEN — no clock, no special tiles. Clear the board at your own pace. Just your eye against the board.