Thorne looked at the floating grid. He ran the logic again. "No," he said, his voice firm. "If I put a 7 there, the row sum is forty-six. That breaks the standard rule set. It’s impossible."
Advanced constraints where no two digits on a line can be consecutive, pushing you to think in "intervals" rather than just exclusions. 3. The Complexity Curve sudoku 129
PUZZLE: SUDOKU 129. DIFFICULTY: LETHAL.
Thorne looked at the floating grid. He ran the logic again. "No," he said, his voice firm. "If I put a 7 there, the row sum is forty-six. That breaks the standard rule set. It’s impossible."
Advanced constraints where no two digits on a line can be consecutive, pushing you to think in "intervals" rather than just exclusions. 3. The Complexity Curve
PUZZLE: SUDOKU 129. DIFFICULTY: LETHAL.