I am trying to solve this sudoku. Im new to the x wing technique.
Are the threes in row 1 column 5, 9 and row 3 column 5,9 part of a x wing, so that i can exclude the 3 from row 1 column 6?
And what about the threes in row 1 column 5,6 and row 7 column 5,6?
Otherwise what am I missing?
Thanks