X sudoku (diagonal sudoku)
0:00Tap a square, then a number
How to play
The normal sudoku rules apply: every row, column and 3×3 box contains 1 to 9 once. In addition, both long diagonals of the grid must contain 1 to 9 once.
The two diagonals are shaded lightly. Use them like an extra row: if a diagonal is missing only a few digits, they can only go in its empty squares.
More puzzles
Killer sudokuDaily puzzle and four levelsClassic sudokuEasy to expertKakuroCross sums in three sizesSamurai sudokuFive grids that overlapJigsaw sudokuIrregular regionsMini sudoku4×4 and 6×6 for kids
Questions
Is X sudoku the same as diagonal sudoku?
Yes. Both names are used for sudoku where the two main diagonals must also contain 1 to 9.
Does every X sudoku have one solution?
Yes. Every puzzle was checked by a computer solver, which confirmed that it has exactly one solution.