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Everything posted by rocdocmac

  1. Chess Board Puzzle

    Use the twelve pieces on the left to create a chess board, The pieces may be flipped!
  2. Chess Board Puzzle

  3. Chess Board Puzzle

  4. Persistence

  5. Chess Board Puzzle

  6. Chess Board Puzzle

    ... rotate and/or flip!
  7. Two people cross a river

    Conjoined twins?
  8. Chess Board Puzzle

  9. Mouse & Cheese Cube

    Hopefully this one has not appeared before... Suppose 27 identical cubical chunks of cheese are piled together to form a cubical stack, as illustrated below. What is the maximum number of these cheese chunks through which a mouse of negligible size could munch before exiting the stack, assuming that the mouse always travels along the grid of 27 straight lines that pass through the centers of the chunks parallel or perpendicular to their sides, always makes a 90 degree turn at the center of each chunk it enters, and never enters any chunk more than once?
  10. Mouse & Cheese Cube

  11. Mouse & Cheese Cube

  12. Mouse & Cheese Cube

    Have another go!
  13. Mouse & Cheese Cube

  14. Chess Knight Problem

    Has this one appeared before?
  15. Chess Knight Problem

    Shot! From A to B, yes ... 14, e.g. A or B (see attached Chess Knight.xlsx) From A to anywhere but B, you'll get one more, e.g. C
  16. Chess Knight Problem

    Maximum, not minimum ... more than 12 moves from A to B, inclusive!
  17. Crystal Problem

    Has this one appeared before?
  18. Crystal Problem

    Well done all of you! The correct answer is indeed 166 667 166 667 000 000