Normal sudoku rules apply. AIM OF EXPERIMENT: Finkz the rat must reach the cupcake by finding a path through the maze. The path will be a snaking line that passes through the centres of cells, without visiting any cell more than once, crossing itself or passing 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 the rounded end / corner of a wall. BLACKCURRANTS: Cells connected by a blackcurrant have a 1:2 ratio (one is double the other.) Not all possible blackcurrants have been given. TEST CONSTRAINT: In this experiment, the correct path will be a valid Dutch Whisper line - ie: adjacent digits along the path must have a difference of at least 4.