48 · Chow patterns
Conditions
Four identical chows in the same suit. Pure Triple Chow and Pure Double Chow are not additionally counted.
How to build it
Plan the starting ranks of the required chows. Leave enough tiles for the remaining set and pair, and check which combinations share sets.
Key tile shapes
Patterns not counted together
Pure Shifted Pungs · Pure Triple Chow · Tile Hog · Pure Double Chow