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sudoku

A free sudoku game — play it in your browser, no install. A dependency free Sudoku game in Spanish, playable in the browser and deployed to GitHub Pages.

by @diegovalenzuelaiturra · diegovalenzuelaiturra/sudoku on GitHubLANG JavaScript★ 1HOSTED ON DIEGOVALENZUELAITURRA.GITHUB.IOUPDATED 3 Oct 2026

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From the README

A difficulty is the hardest technique a board needs, not how many numbers it starts with. Piola falls to singles, Normal needs locked candidates, Peludo needs pairs, and Brígido needs more than any of those. The generator digs a board, grades it by solving it without ever guessing, and adjusts until the grade matches. The clue count moves to get there, so it is not advertised.

The search is allowed to miss: the pares tier is a narrow band and it lands beside it about one board in seven. What it will not do is lie about it.

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