✖️ Diagonal Sudoku

Sudoku X: besides rows, columns, and boxes, the two diagonals (shaded) must also carry 1 through 9 with no repeats.

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📖 How to play Diagonal Sudoku

  1. The sudoku rules apply: 1 through 9 with no repeats in each row, column, and 3x3 box.
  2. In addition, each of the two main diagonals (the shaded squares) must also contain 1 through 9 with no repeats.
  3. Tap an empty square and choose the number. Each puzzle has a unique solution.

💡 Tip: use the diagonals as extra clues; they're usually the best place to start ruling out numbers.

📖 Want to master it? Read the full guide: How to play Diagonal Sudoku (Sudoku X): rules and tricks.