Expert Sudoku for 2026-05-20

Expert Sudoku puzzle published on 2026-05-20, with 28 given clues. Solving it requires the following techniques: Naked Single, Hidden Single, Pointing Triple, Claiming, Naked Pair, Naked Quad, XY-Wing, 2-String Kite, Pointing Pair, Unique Rectangle, Discontinuous Nice Loop, Skyscraper, W-Wing, Finned X-Wing, XY-Chain. Every puzzle on this site is generated by Dancing Links and then verified by a tiered human-style solver, so it is guaranteed solvable with logic alone – no guessing or backtracking.

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Playing Wed, May 20

Choose your difficulty.

Three new puzzles every day.

Solvable with the techniques above, with one solution and no guessing required.

Puzzles are generated by a custom made engine. Sudoku Explainer (LGPL) and HoDoKu (GPLv3) are used to compute the difficulty scores.

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Puzzles are generated by a custom made engine. Sudoku Explainer (LGPL) and HoDoKu (GPLv3) are used to compute the difficulty scores.

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