Sudoku.com - classic sudoku Stats: Ranking in Google Play, Downloads & Users | Similarweb
Good Sudoku' for iOS by Zach Gage and Jack Schlesinger — Tools and Toys
Sudoku 123 - Offline Game - Apps on Google Play
Sudoku 123 - Offline Game - Apps on Google Play
I often end up in situations like this when playing expert puzzles. What's the logic behind stalemates like this, how do I solve it beyond trial and error? : r/sudoku