Normal sudoku rules apply. AIM OF EXPERIMENT: Finkz the rat must reach the cupcake by finding a path through the maze. The path must not visit any cell more than once, cross itself, or pass through any thick maze walls. As well as moving orthogonally, Finkz may move diagonally if there's a 2x2 space in which to do so, but may never pass diagonally through a round wall-spot on the corner of a cell. MODIFIER: There are 9 doubler cells to be located in the maze, one in each row, column and box, and each containing a different digit. The real value of a doubler cell is calculated by doubling the digit that appears in it. BLACKCURRANTS: The values of cells connected by a blackcurrant are in a 1:2 ratio (one is double the other.) Not all possible blackcurrants have been given. FORBIDDEN DOORS: The values of cells connected by a red X sum to 10. Finkz may never pass through a red X. Not all possible Xs have been given. TEST CONSTRAINT: In this experiment, dotted box borders divide the correct path into segments, each of which must be a valid 'nabner line'; no two cells anywhere on a path segment can have consecutive or equal values. Eg: if a path segment contains an 8, there may not be a 7, a 9, or a doubled 4 anywhere else on that segment.