Normal sudoku rules apply. Adjacent digits on the line have a difference of at least 5, and the digits on the line are the same in both directions. The digit in the grey cell must be larger than those in the cells orthogonally touching it.
Normal sudoku rules apply. Adjacent digits on the line have a difference of at least 5, and the digits on the line are the same in both directions. The digit in the grey cell must be larger than those in the cells orthogonally touching it.