A técnica Swordfish (ou Peixe Espada) no Sudoku

In this video I will explain how to use the Swordfish in Sudoku. This technique is more commonly used in advanced Sudoku puzzles. Note: In the last example, the 5x5 swordfish, there are also candidates 7 in row H (columns 1 and 8), which prevents the application as I did. It is still possible to eliminate some candidate 7s in this example by applying a 3x3 swordfish in rows B, F, and H (eliminating I1 and C6) and completing the filling. I apologize for the error and hope you got the idea. Playing Sudoku is an excellent way to train your brain, improve your logical reasoning, concentration, and memory, as well as being a great pastime to have fun!