Overgrowth Pai Sho is a competitive game built on Solitaire Pai Sho.
Each player plays with a 1-player set of Skud Pai Sho tiles.
Players alternate drawing and placing a tile, following the same placement rules as Solitaire Pai Sho, with these clarifications:
- Tiles form harmony or disharmony regardless of whose tile it is
- Like tiles form disharmony (for example, Rose (R3) forms disharmony with Rose (R3))
The game ends when all tiles have been played. The winner is as follows:
- The Host wins if there are more Harmonies on the board
- The Guest wins if there are more Disharmonies on the board