16 · Chow patterns
Conditions
123, 456 and 789 in one suit. Exclusions apply within those three chows; combining the fourth set follows the once-only accounting rule.
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
Short Straight · Two Terminal Chows