I have been playing sudoku for a few months. Have found a few techniques including pencil marking. However cannot get the next step on this puzzle. Can someone please explain how to get another number here. Thanks Thomas
since there is already a 45 in column 4 rows 1 and 3 of column 4 must contain 67 that means row 6 of column 4 can only be a 1 this leaves only singles left to solve the puzzle.