Figure 3: A 13 x 13 neighbourhood of a cell with neighbours marked as in Figure 2. If only Queen's moves are supported, some elongation error is introduced when the true optimal path includes cells that are not marked by red dots. Tiny grey dots indicate cells that cannot be reached by a straight-line connection even if Queen's, Knight's, as well as A- and B-moves are implemented. Image credit: I. Herzog.
Figure 3

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