Instructions: Best Free Mahjong Slide Game. Mahjong slide, that is slide the identical blocks together to remove them from the board. Online Mahjong solitaire games is puzzle games based on the same tiles. The goal is to match open pairs of identical tiles and remove them from the board, exposing the tiles under them for play. The game is finished when all pairs of tiles have been removed from the board or when there are no exposed pairs remaining.