How to declare riichi: rules, ippatsu and ura dora

Declaring riichi

When your closed hand is in tenpai, you can declare riichi: press Riichi, discard, and put up a 1000-point stick. It is a 1 han yaku. Usually pick the discard that leaves the most winning tiles.

You drew . Discard for riichi with the most winning tiles.

Closed hands only

Riichi needs a closed hand (a concealed kan is fine), at least 1000 points and a tile left to draw.

You called pon earlier this hand. Can you declare riichi?

Your hand is locked

After riichi you can't change your hand: every tile you draw that doesn't win is discarded. Letting a winning tile pass makes you furiten for the rest of the hand.

After riichi you draw a tile that would give you a better wait. What can you do?

The rewards

Riichi stacks with other yaku. Win within one go-around for ippatsu (+1 han), and a riichi winner gets extra ura dora. Declare riichi almost every time your closed hand is in tenpai; the few exceptions are in Riichi or dama.

You are in riichi and draw . Tap every yaku.

Tsumo Riichi

Riichi

Declaring riichi

Closed hands only

Your hand is locked

The rewards

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