Expert Sudoku for 2026-06-20

Expert Sudoku puzzle published on 2026-06-20, with 28 given clues. Solving it requires the following techniques: Hidden Single, Naked Single, Pointing Pair, Naked Triple, Claiming, X-Wing, XY-Chain, Naked Quad, Unique Rectangle, XY-Wing. 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.