Normal sudoku rules apply (ie place the digits 1-9 once each in every row, column & 3x3 box). Digits on a grey line must be between the digits in the circles at either end of the line.
Normal sudoku rules apply (ie place the digits 1-9 once each in every row, column & 3x3 box). Digits on a grey line must be between the digits in the circles at either end of the line.