also: ピンホー
pinfu; concealed all-chow hand with a valueless pair and open wait
A mahjong yaku: a concealed hand consisting entirely of chows (sequences), with a pair that is not a value pair (dragons, round wind, or seat wind), and the hand must be waiting on an open wait (ryanmen). Worth 1 han.
from Chinese píng hú
Pinfu is a yaku that requires a concealed hand.
This hand qualifies for pinfu, so with riichi it becomes 2 han.