Twelve pennies are arranged in the pattern of o's below:

      o  o  o
    o  o  o
  o  o  o
o  o  o

Nearby pennies are touching. By the fewest number of legal moves transform the abovementioned pattern into this pattern:

o o o o o o o o o o o o

Note: The only rule is that you must slide a penny without moving any others such that the penny's ending location touches two other pennies.

Posted by K Sengupta on 2023-08-01 21:29:36