This is just a summary of this very useful blog post.
Pons of round wind, your seat wind, 🀄, 🀅, and 🀆.
Entire hand is from tiles of 2-8.
All melds have at least one 1 or 9 or honor.
"Never even try to make this hand. Ever."
These two worth 1 less han when open.
Same sequence through all three suits.
Entire sequence from a single suit.
In a similar vein,
(Closed only)
Same sequence repeated.
These worth 1 less han when open.
Single Suit + Honors
Everything is in the one suit.
(Closed only)
7 pairs.
All sets.
(Closed only)
(waiting for 🀑🀔, and 🀂 is not a yakuhai)
- All sequences (no sets)
- Any 2 tiles except yakuhai as the pair
- Two-sided wait while in tenpai