Tsuidoku Daily Challenge #19

July 27, 2026 · one worldwide grid (UTC) · medium · digits × colors

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

Top 10 of the day

RankPlayerTimeErrors
#1waly6:351
#2Magic of Colors and Numbers10:080
#3Jeca10:152
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Tsuidoku 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