XShisen

XShisen is a Mahjong solitaire game, usually known as Shisen-Sho. The objective is to remove all tiles from the board by selecting matching pairs of tiles. The tiles can be removed if a line can be drawn between the tiles with no more than three orthogonal segments that does not overlap any other tiles. Practically, this usually means that the tiles are on the same side of the game board, or are adjacent, though this simplification is less applicable as more tiles are removed.

This implementation supports three different board sizes:* Regular (18x8)

• Large (24x12)
• Huge (36x16)

It also supports playing with or without "gravity". When gravity is enabled, pieces will fall towards the bottom of the screen as they are removed.