Mah Jong Deluxe

A connect-style mahjong rather than the stacked kind. You click two identical tiles and they clear if a path can be drawn between them with no more than two turns — so the board is read as a network of routes rather than as layers. Mah Jong Deluxe therefore plays closer to a pathfinding puzzle than to a memory one, and a tile that looks free can be unreachable while a buried-looking pair clears instantly.