Oh! You're solving my puzzle, aren't you? That's so exciting! Oh, right, the rules... what were they... Okay, yes, here we go: Normal 6x6 Sudoku rules apply (obviously); Red lines are "Modular" lines - every 3-cell sequence on a red line contains a digit from {1,4}, {2,5} and {3,6}; Blue lines are "Region Sum" lines - box borders divide them into multiple segments with the same sum; Lines only move orthogonally; Lines can't share cells with other lines; Red lines are "Modular" lines -- wait, did I do that one already? I can't remember; Cages are uh.... hmm... oh yeah, "Killer Cages!" - Digits in them can't repeat, and their sum is always always always given in the Upper Left corner (the leftmost cell of the topmost row of the cage) - And they don't overlap; I'm covering most of the grid, but if you place a correct digit, I'll clear from that cell and the cells around it. Whew! I'm sure those were all the rules. Oh, I'm so hopeful that you can solve it!