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A Sudoku is a puzzle consisting of a grid to be filled with symbols, such that each constraining unit contains each symbol exactly once. The typical example is a 9x9 square to be filled with the numbers 1 to 9, where the constraining units are rows, columns, and 3x3 blocks.

13 votes
1 answer
2k views

Nested sudoku in entrance exam

What's the solution for this sudoku? …
Takahiro Waki's user avatar