Problem #1. Which tile do you cut?
- East 1
- North seat
- Turn 6
- Dora indicatordora is 8 sou
Tap the tile you'd discard. The one set apart on the right is your draw.
Free tool何切る
Daily riichi discard problem
A new hand every day at midnight in Japan. Pick your discard, then see how many tiles each choice accepts.
Archive過去問
Past problems
Each problem moves here when its day ends in Japan. The first one lands tomorrow.
How to use
- Read the setup: the round, your seat, the turn, and the dora indicator.
- Tap the tile you'd discard. The tile set apart on the right is the one you just drew.
- Read the verdict and the table. Every discard is listed with the tiles it accepts and how many of each are left.
- Come back tomorrow. Each problem moves to the archive when its day ends in Japan.
How it works
Every hand is 14 tiles off a shuffled 136-tile wall with one red five per suit. The dora indicator comes off the same wall. Each problem sits early in an East round, where the widest discard is the default play.
For each discard the page counts ukeire: the draws that bring you closer to tenpai, four copies of each tile minus the ones in your hand and the dora indicator. The answer is the discard with the lowest shanten and the most tiles. Ties count as right.
A hand only makes the set when that answer is clear. The next-best discard accepts at least two fewer tiles, and the answer is never an isolated tile, the dora, a red five, or a pair of value honors. A tie at 1-shanten stays only when both cuts reach a two-sided or wider tenpai from the same number of draws.
Acceptance leaves out hand value, safety, and the score. When I post my own answer to a problem, it replaces the count and comes with my reasoning. The table stays, so you can see what the cut costs.
Coaching指導
Get a game reviewWant a pro to check the discards from your real games?
Acceptance is the base. Value, defense, and placement decide the close calls. Send me your logs and I'll show you which cuts cost you points.
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