Suirodoku Daily Challenge #2

July 10, 2026 · one worldwide grid (UTC) · medium · digits × colors

7
1
2
5
9
6
8
4
7
8
5
2
4
1
4
8
7
5
5
3
2
6
9
8
7
5
4
4
6
9
7
5
7
9
4
2
8
3
6

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Suirodoku is a free online color sudoku: every row, column and region holds the digits 1-9 AND all 9 colors, and each digit-color pair appears exactly once. The math behind it · Daily hub