SUDOKU Visual Solver

This app is exceptional because it can solve even the most difficult Sudoku that other apps can't handle. The progress of the solution can be visualized down to the smallest steps, while also displaying a detailed description of the action currently being performed. Thanks to this, even a complete layman can quickly and easily learn to solve Sudoku, including very advanced tricks. The application is not installed, it is a program in MS Excel (it has a .XLS extension) and is bilingual (Czech, English). It is not a sudoku generator.