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NineFold

A free sudoku game — play it in your browser, no install. NINEFOLD — a 3D Sudoku Odyssey · 81 levels across nine realms · true 3D cube puzzles, Killer sums, speed challenges, daily puzzles · free in browser

by @Amir83Nasr · Amir83Nasr/NineFold on GitHubLANG JavaScriptHOSTED ON AMIR83NASR.GITHUB.IOUPDATED 5 Oct 2026

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From the README

Sudoku leaves the page: 81 levels across nine realms, true 3D cube puzzles you turn and slice, Killer sums, memory and speed challenges, daily puzzles and a technique academy.

Built entirely by Claude Opus 5.5. Free in the browser.

9 realms × 9 levels = 81 levels.

CI (.github/workflows/android.yml) builds a versioned APK automatically on v* tags. Web deploys to GitHub Pages on every push to main (.github/workflows/pages.yml).

Practising puzzles reliably makes you better at those puzzles and closely related tasks.

Read the full README on GitHub →

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