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Tiger in the Woods (190)
Instruction:
Find a path that starts at a white cell in the grid and visits every white cell in the grid. The path may only travel in the orthogonal directions, and must continue straight if the next cell ahead of it is white (this means that the ending cell of the path must be immediately before a black cell or the edge of the grid). The path may visit a cell more than once, but the visits must be at right-angles to each other and that cell may not be the starting cell nor the ending cell of the path.