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SUDOKU FROM OUTSIDE
The new variant realized by studiogiochi (Leo Colovini), which is becoming more and more popular among players: really a new approach to sudoku.
Fill the grid so that every row, column and 3x3 sector contains once each of the numbers 1 to 9. The numbers outside the grid have to be placed in one of the first 3 spaces in the matching row or column.
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