Normal sudoku rules apply. Pea lines: The sum of the digits on a line strictly between two circles is equal to a concatenation of the two values in the circles, in some order. For instance, 3_346_1 could be a valid split pea line, as 3+4+6=13, which is 1 concatenated with 3. Zipper lines: Cells on a lavender line at an equal distance to the centre, which is marked with a dot, sum to the digit at the centre. (Note: The circles of pea lines are NOT part of the zipper lines. Ie the pea lines are green and lavender but the zipper lines are only the lavender parts.)