Normal sudoku rules apply. Digits may not repeat in cages. If the sum of a cage is a 1-digit number, that number must be in the cell pointed at by the cage's northwest corner. If the sum is a 2-digit number, it must be in the domino formed by that cell and the one to its left. (Example: if the sum of the cage in Box 3 was 9, then r1c6 would be 9. If it's sum was 12, then r1c5 would be 1 and r1c6 would be 2.) Every set of 4 adjacent digits on a peach line must contain a digit from each of the X-pair (ten-pair) subsets of {1,9}, {2,8}, {3,7}, and {4,6}. A 5 may not appear on a peach line. Digits on a line may repeat if allowed by other rules.