Expert Sudoku for 2026-04-20

Expert Sudoku puzzle published on 2026-04-20, with 27 given clues. Solving it requires the following techniques: Naked Single, Hidden Single, Pointing Pair, Naked Pair, Naked Triple, X-Wing, Naked Quad, 2-String Kite, XYZ-Wing, W-Wing, Skyscraper, 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.