Suirodoku Daily Challenge #-5

July 9, 2026 · one worldwide grid (UTC) · medium · digits × colors

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