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16x16 Sudoku (Hexadoku) uses numbers 1-16 and 4x4 subgrids—what’s the trickiest Hexadoku you solved (dense candidate lists, or few starting clues), and how did you scale standard Sudoku logic to 16x16? Did you ever split the grid into 4x4 sections to simplify, and what’s the most satisfying large-grid solve moment you had?
Posted : September 21, 2025 6:30 pm