Suirodoku Daily Challenge #11

July 19, 2026 · one worldwide grid (UTC) · medium · digits × colors

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

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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