Expert Sudoku for 2026-05-31

Expert Sudoku puzzle published on 2026-05-31, with 28 given clues. Solving it requires the following techniques: Hidden Single, Naked Single, Pointing Pair, Claiming, Naked Triple, Naked Quad, 2-String Kite, Swordfish, W-Wing, XY-Chain, Discontinuous Nice Loop, Naked Pair, Unique Rectangle. 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.