Repeater Lines 3

Normal Sudoku rules apply, place the digits 1-9 in each row, column, and box. Anti-Knight: Cells that are a Knight's move apart (in chess) may not contain the same digit. Repeater lines: every digit on a red line must occur more than once on that line. Quadruples: Digits in a Quadruple circle must be placed at least once in the four cells touching that circle.