Diagonal Sudoku
Classic Sudoku plus one extra rule: both main diagonals must contain 1-9 too. A tighter, more elegant logic challenge — free, in your browser.
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How to Play
Fill the 9×9 grid so that every row, column, 3×3 box and both long diagonals contain 1–9 exactly once — the diagonals are the extra twist. Tap a cell and place a number. Three wrong placements end the game. Every puzzle has exactly one solution, and your best solve streak is saved.
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