Intermediate Sudoku for 2026-05-21

Intermediate Sudoku puzzle published on 2026-05-21, with 32 given clues. Solving it requires the following techniques: Naked Single, Pointing Pair, Naked Pair, Claiming, Hidden Single, Naked Quad, Naked Triple. 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.