SudokoSolver is a program to play and solve sudokus using an iterative constraint propagation algorithm.
The program presents two modes: playing and solving.
In playing mode, one can navigate on the grid and add digits to it. One can load three prescribed grids by pressing E (easy), M (multiple solutions), or H (hard). The grid can be completely cleaned by pressing ESCAPE.
The solving mode is activated by pressing SPACE. Then one can run the solver by pressing SPACE again. The initial fixed cells are indicated in black. The deduced ones are in red. To go back to playing mode, press ESCAPE.
When multiple solutions have been found, navigate through the different ones using LEFT and RIGHT.