Tsuidoku Daily Challenge #72

September 18, 2026 · one worldwide grid (UTC) · medium · digits × colors

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

Top 10 of the day

RankPlayerTimeErrors
#1Yash78933:471
#2Lockdalf4:570
#3Squall5:110
#4waly5:420
#5idris khan6:091
#6Nidal Shaheed7:482
#7Mongkol Meesuk7:480
#8CalciteCow7:510
#9Marcell Bóta8:361
#10madhusudhan yadav8:431
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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