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Hard Sudoku — Puzzle 19

1
526
6374
78
9437
62
1823
7128
91

Solve it here

Tap an empty square, then tap a number. Or print the page and use a pencil.

0 of 55 squares filled

Fill every row, every column and every 3 by 3 box with the numbers 1 to 9. This puzzle has 26 given numbers and exactly one solution.

263784591
457192368
198563724
715248639
984637152
632951847
541826973
379415286
826379415

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