SOMEDOKU: Fill the grid with the digits 1-9 so that each row N and column N contain exactly N distinct digits, with the rest of the cells in that row / column being repeats. For example, only 3 distinct digits appear in row 3, and any of these can be repeated multiple times in order to fill the row. AIM OF EXPERIMENT: Finkz and Phinx must both reach the cupcakes by finding a path through the maze. The paths must not visit any cell more than once, cross themselves or each other, or pass through any thick maze walls. The paths may only intersect at the cupcake cell. As well as moving orthogonally, they 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. BLACKCURRANTS: If a blackcurrant sits between two digits, one is double the other. REDCURRANTS: If a redcurrant sits between two digits, one is odd and the other is even. GRAPES: If a grape sits between two digits, they have a difference of at least 5. CAGES: Digits may not repeat within a cage. Each cage has the same total, to be deduced. If the digit on a cage's electricity symbol is 5 or higher, the cage may not be entered. TEST CONSTRAINT: In this experiment, both rats visit the same number of cells. Any pair of cells (one on each path) that are an equal distance from the cupcake cell sum to the digit on the cupcake cell. Thus, both paths combined form a valid 'zipper' line, with Finkz and Phinx at the ends and the cupcake cell in the middle.