Shanten Count
Read shanten from a 13-tile hand, including standard, seven pairs, and kokushi. Build the feel for how far you are from tenpai.
BeginnerAbout 5 min
Train shanten countingChoose a Drill
Start any focused drill from this hub. Each mode trains one core skill—build tenpai and shanten recognition first, then move to discard and one-shanten decisions, or practice identifying every hand-inherent yaku.
How to train
This hub lists every focused drill. Pick a mode from the learning path, practice it, open the related guide when a judgment is unclear, and use the daily challenge for one shared set.
- Pick a mode from the learning path below, or open the drill you want to work on.
- On that page, set tile count and difficulty, then answer in practice or timed mode. A wrong answer stays on screen with the correct line.
- Each mode card and the bottom of the drill page links to a related guide. Read it when the rule is still unclear.
- For one shared set, open the daily challenge: five tenpai questions and five discard questions, the same for everyone that UTC day.
Suggested learning path
Follow this order to move from “how far from tenpai” to discard decisions, yaku, and scoring. Or start with the daily challenge, then drill your weak spots.
All training modes
Tenpai
Name waits from tenpai shapes, from basic waits to multi-sided tenpai. Core entry to tile-efficiency training.
BeginnerAbout 8 min
Mahjong tenpai trainingOne-away
List every effective tile on one-shanten hands—train tile counts and wide vs narrow ukeire.
IntermediateAbout 10 min
Practice one-shanten ukeireDiscard Decision
Pick the best discard from 14 tiles by comparing shanten and ukeire after each cut—close to real discard decisions.
IntermediateAbout 10 min
Start discard trainingOne-away Discard
At one-shanten, choose the discard that keeps the widest ukeire among lines that do not worsen shanten.
AdvancedAbout 12 min
One-shanten discard drillsYaku Recognition
Check every hand-inherent yaku on completed hands—from basics through composites and yakuman.
IntermediateAbout 10 min
Practice yaku recognitionScore Calculation
Enter fu, han, and ron/tsumo payments from yaku and table context; full scoring breakdown after each answer.
AdvancedAbout 12 min
Practice score calculationFriend Challenge
Share interesting hands from analysis or training and challenge friends on the same puzzle.
Challenge a friend