Hysteresis mazes

This puzzle is based on an original mechanical puzzle by Oskar van Deventer. Your challenge is to manoeuvre the blue icon to the red square using east/west movement only. You rely on the sloping walls to push the ball north/south.

Later mazes include special yellow switch points where you can choose between east/west movement or north/south movement. Your choice will stay in force until you reach another switch point.

For more information about this puzzle visit: http://www.clickmazes.com/hk/new-hk.htm