Tsuidoku Daily Challenge #31

August 8, 2026 · one worldwide grid (UTC) · medium · digits × colors

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

Top 10 of the day

RankPlayerTimeErrors
#1Mongkol Meesuk6:421
#2waly7:542
#3Squall10:300
#4Jeca11:444
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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