Use a hidden singles solver optimized for multicore processors to solve a Sudoku with a box dimension of 75 (approximately 15M blanks). Resolving one blank per second would take 176 days!
Puzzle Approved Text file of Sudoku puzzle for 5625x5625 grid.
Puzzle Solution Approved Step by step solution in Text file of Sudoku puzzle for 5625x5625 grid.
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