Concealed hand
1 tai#No chows, pungs or exposed kongs all hand, and you win on someone's discard.
Example
1 Characters2 Characters3 Characters4 Characters5 Characters6 Characters7 Characters8 Characters9 Characters2 Dots3 Dots4 Dots4 Bamboo5 Bamboo9 Bamboo9 Bamboo
Win6 Bamboo
Counted by the scoring program:
- Concealed hand1 tai
- All sequences2 tai
Counterexample
4 Characters5 Characters6 Characters7 Characters8 Characters9 Characters2 Dots3 Dots4 Dots4 Bamboo5 Bamboo9 Bamboo9 Bamboo
Win6 Bamboo
1 Characters2 Characters3 Characters
Once you have chowed, it no longer counts as concealed.