Intermediate Sudoku for 2026-05-20

Intermediate Sudoku puzzle published on 2026-05-20, with 28 given clues. Solving it requires the following techniques: Naked Single, Hidden Single, Claiming, Pointing Triple, Naked Triple, Pointing Pair, Naked Quad. 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.