# Diabolical Sudoku: Hard Logic

> No guessing. Pure logic.

Canonical page: [https://chrome-stats.com/d/id6772833403](https://chrome-stats.com/d/id6772833403)

## Overview

- **ID:** `id6772833403`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** kenta yamamoto
- **Category:** Puzzle
- **Version:** 1.6
- **Last updated:** 2026-09-10
- **First published:** 2026-05-28
- **Size:** 7.73 MB
- **Data as of:** 2026-09-22
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/diabolical-sudoku-hard-logic/id6772833403)
- **Website:** [https://ychof.com/mugen-sudoku/](https://ychof.com/mugen-sudoku/)
- **Privacy policy:** [https://ychof.com/mugen-sudoku/privacy-policy/](https://ychof.com/mugen-sudoku/privacy-policy/)

## Description

No interrupting ads, ever. For players bored by ordinary sudoku, we serve up Demon-level difficulty. Stuck? Watch it solved, step by step.

Diabolical Sudoku is a no-nonsense sudoku app built for one thing: hard puzzles.
If easy sudoku has stopped being fun, this is for you—every puzzle is chosen to need real techniques like X-Wing, XY-Wing, and Swordfish.

■ Three difficulties
・Hard … solvable by logic alone, with real bite
・Expert … advanced techniques required
・Diabolical … X-Wing / XY-Wing / Swordfish-class stumpers

■ Highlights
・Step-by-step explanations … stuck on a puzzle? See which technique cracks which cell, one move at a time
・One unique solution … no guessing, ever. Pure logic always gets you there
・Controls your way … pick your input order (digit-first or cell-first) and your memo style
・Pencil marks, auto-candidates, highlighting, and reset
・Auto-save, with clear status and solve times recorded
・No interruptions … no full-screen ads breaking your concentration

One good puzzle at a time. Chase that "I solved it!" feeling, again and again.

## Rankings

- #2,182,518 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6772833403)