Han: 2 han
Closed only
Difficulty: ★★★☆☆
Requirement:
- Form seven distinct pairs
- No identical pair duplication
Meaning:
A unique hand structure with fixed fu (25). Often results in flexible waits but cannot mix with sequence-based yaku.
Good with:
Riichi / Menzen Tsumo / Dora-heavy hands
Cannot combine:
Iipeikou / Ryanpeikou / Toitoi / Chanta / Junchan