This blog post has a nice visualization of sudoku solving using backtracking. https://medium.com/analytics-vidhya/sudoku-backtracking-algorithm-and-visualizatio

This blog post has a nice visualization of sudoku solving using backtracking. https://medium.com/analytics-vidhya/sudoku-backtracking-algorithm-and-visualization-75adec8e860c https://medium.com/analytics-vidhya/sudoku-backtracking-algo... Although the case they use is almost perversely simple. Imagine in a 'real' sudoku that each number might need to be backtracked multiple times, such that the algorithm is regularly going almost back to the start. Edit: here's a classic one trying to solve the 8 queens problem: https://commons.wikimedia.org/wiki/File:Eight-queens-animation.gif https://commons.wikimedia.org/wiki/File:Eight-queens-animati...