 of Sudoku", that a first order formula that does not mention blocks (also called boxes or regions) is valid for Sudoku if and only if it is valid for Latin Squares (this property is trivially true for the axioms and it can be extended to any formula).The first known calculation of the number of classic 9×9 Sudoku solution grids was posted on a USENET newsgroup rec.puzzles in September of 2003[9] and is 6,670,903,752,021,072,936,960 (OEIS හි A107739 අනුක්‍රමය). This is roughly 0.00012% the number of 9×9 Latin squares. A detailed calculation of this figure was provided by Bertram Felgenhauer and Frazer Jarvis in 2005[10]. Various other grid sizes have also been enumerated—see the main article for details.  The number of essentially different solutions, when symmetries such as rotation, reflection and relabelling are taken into account, was shown by Ed Russell and Frazer Jarvis to be just 5,472,730,538[11] (OEIS හි A109741 අනුක්‍රමය).   The maximum number of givens provided while still