Muzukashii
Focused Sudoku
難しい · Muzukashii · "difficult"
Sudoku, but you only see one ninth at a time.
A standard nine-by-nine board hides behind the screen. Only the three-by-three you're working on is visible — the rest live in your head. Swipe between boxes, or tap the mini-map to wander.
- Daily Challenge
- Game Center
- iCloud sync
- Zen mode
A look inside
What's inside
Built with care, down to the details.
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Three difficulties
Ichi, Ni, San. Pick your tier and pick up exactly where you left off.
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Daily Challenge
One puzzle a day, the same for everyone. A calendar tracks your streak.
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Zen mode
No timer, no record — just the board and the leaves.
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Pencil notes
Scratch candidates into a cell; placing a digit clears its peers.
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Conflict arrows
The board you can't see still talks back — a red arrow points to a duplicate hidden in another box.
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Koyo atmosphere
Washi paper, Sumi ink, soft ambient music and a page-flip on every region change.
About Muzukashii
Muzukashii — Japanese for “difficult” — is a minimalist Sudoku that hides most of the board. You see only the three-by-three box you’re working on; the rest of the nine-by-nine lives in your head. Swipe between boxes or tap the mini-map to move around, and let the board you can’t see talk back through quiet conflict arrows when a digit clashes with one hidden elsewhere.
It’s wrapped in a Koyo (autumn-leaf) atmosphere — washi paper, Sumi ink, soft ambient music, and a page-flip on every region change. Play three difficulties, chase the Daily Challenge with a streak calendar, climb Game Center leaderboards, or drop into a timer-free Zen mode.
A single, optional Supporter Edition tip unlocks a few cosmetic extras, but the whole game — every puzzle, the Daily Challenge, Game Center and iCloud sync — is fully playable for free.
♥ Supporter Edition
A single one-time tip.
The app stays fully playable without it — nothing behind the gate is required to solve a puzzle. Adds dark mode, an alternate app icon, a custom splash and a supporter badge, with more to come at no extra cost.