Tsuidoku Daily Challenge #71

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

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

Top 10 of the day

RankPlayerTimeErrors
#1Yash78933:301
#2Squall5:361
#3Anh Vũ Phạm5:511
#4waly6:310
#5idris khan6:330
#6Mongkol Meesuk7:093
#7Nidal Shaheed7:552
#8Zoran Zivkovic8:191
#9madhusudhan yadav8:252
#10Brijesh Deodhar8:351
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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