Four copies of a tile in your winning hand, without declaring those four as a kong.
One tile away.
The winning hand
The gold outline marks the winning tile. Revealed sets are separated from concealed tiles.
The moment it comes together.
You have already voided the absent suit. You have kept the illustrated tiles while the other players draw and discard. You draw 5 circle, completing root. Declare Hu to see how the scoring features combine.
Compatible features can combine. The fan total is capped at four; a full score also depends on the winning tile and surrounding play.
Try this hand at the table.
Open the in-game Glossary, choose SBR and Root, then tap Try It for a practice match one move from Hu.