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  • $\begingroup$ You are missing a significant portion of the puzzle. I also miscalculated level 11; it should be 7 moves, not 6, which I'll edit. Here's a hint: the car can move in all directions. $\endgroup$
    – Sny
    Commented Feb 14 at 9:33
  • $\begingroup$ Level 11 is correct now, but can you extend the rule more generally? In paticular both your Level 13 and Level 14 routes are illegal. Here's the hint again: the car can move in all directions, not just straight and diagonal. How would you formalize this notion of "gaining momentum", and generalize it? $\endgroup$
    – Sny
    Commented Feb 14 at 10:15