3
Counters:
Leapfrog puzzle
rules -
a counter can only move onto an empty square (it
will move when you click on it):
- The left (blue) set of counters can only move right, the right
(red) set of counters
can only move left.
- Counters can move forward one space, or move two spaces by leapfrogging over
another counter.
- The puzzle is solved when the two sets of counters have switched positions.