hand structure riichi
Menzenchin
門前清
(めんぜんちん)
Definition
Closed hand - a hand with no called melds (chi, pon, or open kan). Required for many yaku and adds 10 fu when winning by tsumo.
Related Terms
Riichi
立直
Declaring ready - a 1-han yaku and core mechanic of Japanese mahjong. Declared when in tenpai with a closed hand by paying 1,000 points and placing a stick. Locks your hand but enables additional yaku.
Tsumo
自摸
Winning by self-draw - completing your hand by drawing the winning tile yourself. All three opponents pay a portion of the total.