What's the most complicated sudoku technique that is required to solve the most difficult puzzles?
In other words, for which sudoku techniques do there exist a puzzle that cannot be solved without using that technique? (Brute force checking - just f
In other words, for which sudoku techniques do there exist a puzzle that cannot be solved without using that technique? (Brute force checking - just filling in numbers randomly to see if they work and backtracking if they don't until you find the correct answer - doesn't count as a technique.)
or:In other words, for which sudoku techniques do there exist a puzzle that cannot be solved without using that technique? (Brute force checking - just filling in numbers randomly to see if they work and backtracking if they don't until you find the correct answer - doesn't count as a technique.)
Tags:checking,complicated,