PlaySudoku.us
Hard · Puzzle #409
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"You can't put a limit on anything. The more you dream, the farther you get." — Michael Phelps
"You can't put a limit on anything. The more you dream, the farther you get." — Michael Phelps
There are 6,670,903,752,021,072,936,960 valid completed Sudoku grids — that's 6.7 sextillion.
There are 6,670,903,752,021,072,936,960 valid completed Sudoku grids — that's 6.7 sextillion.