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His Eyes Opened!

RoboRally 2.0 Solution

The challenge was to get Twonky (that's the little red robot) onto the flag and win the game in exactly 10 moves.


You've been dealt the following 10 cards:

Move 3, Move 2, Move 2, Move 1, Move 1, Move 1, Backup, Backup, Backup, Backup.

Once again I'm presented with two possibilities; either I'm a lousy puzzle creator or you are all excellent puzzle solvers. I'll leave it as an exercise for the reader which I'm partial to. When I created the above puzzle I really thought it would be difficult to solve but I received a great many correct solutions. Even more surprising was the different number of solutions, there were at least seven unique answers! Some of these were slight variations of each other but the following four are sufficiently different to warrant listing. (Interesting in that every solution submitted required the final two moves to be Backup, Move 2.)

  • Move 3, Move 1, Move 1, Backup, Backup, Move 1, Backup, Move 2, Backup, Move 2
  • Move 1, Move 1, Move 3, Backup, Backup, Move 2, Backup, Move 1, Backup, Move 2
  • Move 2, Backup, Move 1, Move 1, Backup, Move 3, Backup, Move 1, Backup, Move 2
  • Backup, Move 1, Move 1, Move 2, Backup, Move 3, Move 1, Backup, Backup, Move 2

The winner of the draw was Jeroen Velthooven, congratulations!

- Greg Aleknevicus

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