Tsuidoku Daily Challenge #85

October 1, 2026 · one worldwide grid (UTC) · medium · digits × colors

4
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7
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9
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Top 10 of the day

RankPlayerTimeErrors
#1TilakSN3:260
#267673:491
#3pocok4:052
#4yellow_orion124:060
#5ninana4:160
#6bloome4:212
#7Anj-Lynn4:311
#8teo4:410
#9m4054:590
#10yxsha515:223
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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