Entotsu

Entotsu 「エントツ」 is a wait pattern, that utilizes two basic patterns in combination: ryanmen and shanpon. In combination, the pattern produces a 3-sided wait, or waits on three tile types.

Entotsu
Kanji エントツ
Fu Triplet dependent
Tile types waiting {{{type}}} sided wait
Tiles available 7 tiles tileExpression error: Unrecognized word "tiles".
Tenhou.net example

Tile pattern

              Waiting for:  ,  , or  

The pattern consists of middle numbered tiles and an extra pair of any other tiles. If the numbered tiles included terminals, then the pattern is a simple shanpon.

Example: Not entotsu

              Waiting for:   or  

If a 10-man tile exists, then this would be entotsu; but of course, that is not the case.

Fu

This tile pattern does not reward fu on its own. Instead, fu is earned via the composition of the triplet. Regardless of the winning tile, the pattern guarantees one triplet.

External links

Entotsu in Japanese Wikipedia