Tsuidoku Daily Challenge #23

July 31, 2026 · one worldwide grid (UTC) · medium · digits × colors

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

Top 10 of the day

RankPlayerTimeErrors
#1waly6:351
#2Jeca9:483
#3Mongkol Meesuk10:030
#4Magic of Colors and Numbers10:450
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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