You have quarters laid out in the following pattern on the left and you want to move quarters to form the pattern on the right.

  Q      Q Q
 Q Q    Q   Q
Q Q Q    Q Q

Before| |After

The only rule is you must slide a coin without moving any others, such that the coin's ending location touches two other quarters. This means the following moves are illegal:

 A 1     Moving C to 1    
B C D 2  Moving B to 2  
 E F 

What is the shortest solution?

(In reply to 3 step solution by Emily)

Along with what ThoughtProvoker said, I think your second-to-last step is illegal too.  Specifically, the movement of D from its original location. 

Posted by logischer Verstand on 2004-03-29 22:21:42