Two Sudoku puzzles have recently posed problems for me. These are self-proclaimed hard puzzles. In both of these puzzles I solved just less than half the open squares but could not progress further. I found two squares that were either one number or another, assumed numbers for these two and continued. After filling I shortly discovered that I had made an error in my assumption. Following my trail of bread crumbs back to where I made my "guess", I then switched the numbers and proceeded to correctly solve the puzzle.
My question is this, did I solve the puzzle legitimately? Tory says no - every step must be logical. I say yes because I solved without outside assistance or looking at the answer. Trial and error is a powerful learning tool.
Let me know.
