This program literally solves Sudoku puzzles. You simply enter in the puzzle that you want solved and the program will work it out. The program solves the puzzle using the methods that you or I use, using logic only. It does NOT "hard crack" i.e. take thousands of guesses. It solves the puzzle step by step, you can see every number entered and its location.
It can solve virtually every easy and moderate puzzle, and the vast majority of hard puzzles. Puzzles rated more difficult than hard are often not solvable using solely the methods that this program uses. The program is in one single batch file, written entirely in batch. There are no other files needed or created.
Thanks to CrazyMonkey124 for the idea of a Sudoku solving program.