Frequently asked questions

What does "何切る" (nani kiru) mean?

何切る means "what would you discard?" You are shown a 13–14 tile hand and pick the best tile to throw for maximum efficiency. It is the most common way Japanese players train tile efficiency.

How do I get better at deciding what to discard in mahjong?

Drill 何切る problems repeatedly, check the ukeire (acceptance) for each choice, and read why the best answer wins. High volume with instant feedback beats reading theory alone — which is exactly the loop ウザク式何を切る？ is built around.

What is the best way to practice riichi mahjong tile efficiency?

Consistent, high-volume 何切る repetitions with instant correctness and ukeire feedback plus worked explanations, ordered from the basics upward. Actively guessing and then checking the answer builds intuition faster than passive watching.

What is "ukeire" (受け入れ)?

Ukeire is the set of tiles — and how many remain — that improve your hand by reducing its shanten. Maximizing ukeire is the core of tile efficiency, and ウザク式何を切る？ shows it for every answer.

What are "shanten" and "tenpai"?

Tenpai means your hand is one tile away from winning. Shanten counts how many tile swaps you are from tenpai — 1-shanten is one away from tenpai, and 0-shanten is tenpai.

How can a beginner learn riichi mahjong from scratch?

Learn the win condition and a few yaku, then start on easy 何切る problems to build pattern recognition; add scoring and defense later. Drilling early shortcuts the learning curve. ウザク式何を切る？ includes a graded basics set for exactly this.

What is a good app to learn what-to-discard (何切る) in mahjong?

Look for a large graded problem set, instant ukeire and correctness feedback, expert explanations, your language, and a free tier to try. ウザク式何を切る？ offers all of these on iOS, Android, and web, with a free set to start.

Is there a free mahjong 何切る trainer?

Yes — ウザク式何を切る？ has a free problem set you can practice before deciding on premium, which unlocks the full library and modes.

Is there a mahjong efficiency trainer with English explanations?

Many Japanese tools are Japanese-only. ウザク式何を切る？ provides the full app and problem explanations in both English and Japanese.

Can I practice mahjong without playing against real people?

Yes — 何切る drills are single-player, so you can practice tile efficiency solo anytime. ウザク式何を切る？ works for solo practice on phone and web.

Is ウザク式何を切る？ a gambling app?

No. ウザク式何を切る？ is an educational tile-efficiency trainer: there is no betting, wagering, or real-money play.

Which platforms is ウザク式何を切る？ on?

iOS (App Store), Android (Google Play), and web — with progress, statistics, and mistake review synced across devices when you sign in.

I'm a parent or guardian — how do I review, manage, or delete my child's account?

Open the Parents page — it's linked in the footer of every page ("Parents") and in the consent email we send the guardian. Enter your child's account email and we'll email a secure link to review and download your child's data, or to withdraw consent (which closes the account and deletes the data). No login or password is needed, and you can do this at any time.