Tsuidoku Daily Challenge #40

August 17, 2026 · one worldwide grid (UTC) · medium · digits × colors

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

Top 10 of the day

RankPlayerTimeErrors
#1Squall4:545
#2waly5:381
#3Mongkol Meesuk8:121
#4Tuan7638:300
#5nurul928:300
#6Yuki6348:300
#7Rina7748:450
#8Jeca9:297
#9brain_Budi9:291
#10Minh3079:550
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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