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Knight Distance code-golf
In Chess, a Knight on cell (x, y) may move to (x-2, y-1), (x-2, y+1), (x-1, y-2), (x-1, y+2), (x+1, y-2), (x+1, y+2), (x+2, y-1), (x+2, y+1) in one step. Imagine a infinity board with only a Knight on (0, 0):
How many steps is required for moving a Knight from (0, 0...