Tile Stack Mahjong

1. Slot the next tile into any column — the tiles already there shift along.
2. Whichever tile is squeezed out takes over as the central tile and decides who plays next.
3. Build a group of four identical tiles in each column.
4. Throw away the White Dragon if it lands with you — it can't be matched, but it earns an extra turn.
5. Complete all nine columns to win.

Tile Stack Mahjong borrows mahjong tiles for a turn-based stacking duel. On every turn you slot the next tile into one of the columns, the tiles there shift along, and the one squeezed out at the far end takes over as the central tile — which also determines whose turn is next. The aim is to finish all nine columns, each holding a group of four identical tiles, so every placement has to balance building your own sets against what the displaced tile hands over. The White Dragon is pure trouble: it can't be matched and has to be thrown away, although drawing it earns an extra turn. Reading which tiles are likely to show up next is what separates a lucky win from a planned one.