How is this different from discard training?

Discard training starts from a tenpai shape plus a tile that does not win, and asks which cut keeps the widest wait. This drill starts from one-shanten plus a tile that does not improve it, and asks which cut reaches the widest tenpai. Both grade by tiles left, and ties all count.

Why is the hand already one-shanten?

The deal builds a one-shanten hand, then adds one tile that does not lower shanten. You see the shape after the draw and cut back to the widest one-shanten. You are not protecting a wait you already have.

Why do some cuts look almost equal?

Overlapping shapes can leave ukeire that differs by only one or two tiles. The answer shows type count and tile count side by side. Only the highest tile count is correct, so equal counts are all accepted.

Do 8, 11, and 14 tiles all exist?

Yes, and the rule is the same. Fourteen tiles is the draw-and-discard shape, while eight and eleven are shorter so the comparison is easier to count. Only a 14-tile answer can jump to Hand Analysis.

How does this relate to ukeire?

Types versus tiles left are explained in counting ukeire. One-shanten training asks you to select every improving tile, not a count. This page only asks which single tile to cut.

One-Shanten Discard Training

Tiles Count

After you start, copy the challenge link from Share above to have a friend answer this hand. How it works is on Friend Challenge.

Best

Score

Countdown

What this drill trains

One-shanten discard asks which tile to cut one step before tenpai. Hands are one suit: one-shanten plus a tile that does not lower shanten. The best cut leaves the most tiles that reach tenpai. Ties count. Any other cut scores zero.

How to practice

Choose 8, 11, or 14 tiles, then start. The suit changes each hand. All three lengths use the same ukeire rule.
Tap a tile or press 1–9, then submit. A miss keeps the hand and lists each cut with its types and tiles left.
Timed mode lasts 30 seconds. Each hit adds about ten points per second left. One miss ends the round.

How to read the answer

Green rows are the widest ukeire, including ties. Badges are type count and tiles left. A shorter count is wrong. Only 14 tiles open Hand Analysis. How ukeire is compared is in One-shanten discard

FAQ

Want another drill?

Return to the training hub for every mode, the learning path, and short guides.

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Daily Challenge

Five tenpai + five discard puzzles—same set worldwide today.

Play today's set

Related guides

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