88 · Kong patterns
Conditions
Four kongs, exposed or concealed. Single Wait is not added. Four Concealed Pungs may be added when all four kongs are concealed.
How to build it
Track the fourth copy and whether each kong is exposed or concealed. Before declaring, check concealed-pung counts and the replacement-tile winning chances.
Key tile shapes
Patterns not counted together
All Pungs · Single Wait · Three Kongs · Two Melded Kongs · Two Concealed Kongs · Melded and Concealed Kong · Melded Kong · Concealed Kong