The classic mind games existed decades ago, who still remembers well now? I don't want to talk about their appeal but about the value, they bring to players. In addition to being highly entertaining, mind games also help us passively train our brains, and I think that's very helpful. One of those classic games is Sudoku, currently, sudoku is being collected by Sudoku 247 and is completely free for everyone. Why don't we try to experience and evaluate this game when the benefits it brings are undeniable?