Sudoku 9x9 num: 6406 (Level: hard)
6
4
7
8
2
7
9
3
4
1
2
6
4
1
9
8
9
5
4
6
7
9
8
9
3
5
2
1
2
1
6
Diagonal Sudoku is a refreshing twist on the classic puzzle that adds an extra layer of challenge to the familiar rules. The game is still played on a 9x9 grid, divided into nine smaller 3x3 boxes, and the basic objective remains the same: fill every row, column, and box with the numbers 1 through 9 without repeating. What makes this version unique is the addition of two long diagonals that cross the entire board from corner to corner. Just like rows, columns, and boxes, each diagonal must also contain every number from 1 to 9 exactly once. This extra constraint forces players to think more broadly, scanning not only across the standard areas but also along the diagonals to maintain balance.
At the beginning of the puzzle, several numbers are already placed on the grid, offering clues to start building your strategy. From there, every move must be carefully checked against rows, columns, boxes, and now diagonals, making the solving process more intricate. Each Diagonal Sudoku has a single valid solution, achieved through logic alone rather than guessing. This easy version is perfect for players who enjoy the standard Sudoku but want to explore a richer variation without making the leap to much larger boards. It trains observation, forward planning, and flexible thinking, as you must always keep the diagonals in mind. Playing Diagonal Sudoku feels like solving the classic game with an elegant new dimension, turning each step into a deeper and more rewarding puzzle experience.