Free daily grids that can be printed. Also offers solution and archive.
Free daily puzzles with four difficulty levels. Also offers a solving assistant and downloadable e-book collections for purchase.
Collection of printable grids, ordered by difficulty level. Solutions provided. Includes rules and solving methods.
JavaScript brute force solver.
Articles and puzzles from The Times (London).
Step by step guide to solving sudoku puzzles. Goes from basic to advanced techniques.
Personal page describing Sudoku, rules, strategies, and offering puzzles to print. [Dutch/English]
Offers daily puzzle in PDF format. Includes archive, FAQ, and a "dozen" variant.
Offers four difficulty levels. The puzzles can be solved online or downloaded as a PDF file. [English/German/French/Spanish/Dutch/Portuguese/Italian]
Blog discussing techniques for creating and solving puzzles, including hard puzzles. Also offers a daily puzzle.
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Go_Sudoku
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