Expert Sudoku for 2026-01-09

Expert Sudoku puzzle published on 2026-01-09, with 28 given clues. Solving it requires the following techniques: Hidden Single, Naked Single, Pointing Pair, Claiming, Naked Quad, Finned X-Wing, Naked Triple, X-Wing, Naked Pair, XY-Wing, 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.