Mastering the XY Chain Sudoku Technique
If you've ever hit a wall on an Expert level puzzle, learning the xy chain sudoku technique is honestly one of the best ways to break through. You know that feeling when you've filled in every single note, found all the naked pairs, and cleared out the hidden triples, but the grid still refuses to budge? It's frustrating. You're staring at a sea of little pencil marks and nothing is jumping out. That's usually exactly when an XY chain is waiting to be found. ...