遊び方 (あそびかた / asobikata) — How it works
Press New Hand. You'll see a finished (winning) 14-tile hand — now including kan (槓, quads) — plus the full table situation: round wind, your seat wind, dealer status, riichi/ippatsu, ron or tsumo, rinshan/chankan, and the dora (and kan-dora) indicators.
For Han, tick every yaku you believe applies and fill in the yakuhai / dora / aka dora / ura dora counts — you're not asked for a bare number, you're asked to name your reasons. For Fu, tick the bonus components that apply, pick the wait shape, classify each triplet/kan meld, and then enter the raw fu total before rounding up (the rounding to the nearest 10 is shown afterward, not asked for). Finally enter the winner's total score (点数). Press Check and the full correct breakdown is revealed either way — which yaku you got right, which you missed, and the complete fu and score math.