Sudoku 4×4 Hard — Set 13By skyseed_admin / April 9, 2026 hard 4×4 Set 13 Complete the sudoku grid (9x9): each row, column, and box must contain each digit exactly once. Grid: [_ 1 _ 4 | _ _ _ _ | _ 2 3 _ | _ 3 4 2] Check Answers Reveal Solution Reset