Tsuidoku Daily Challenge #21

July 29, 2026 · one worldwide grid (UTC) · medium · digits × colors

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

Top 10 of the day

RankPlayerTimeErrors
#1Mongkol Meesuk7:263
#2waly8:500
#3AfonsoPerks11:450
#4Magic of Colors and Numbers14:500
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← #20#22 →

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