COMPLEX PUZZLES

 

These should really make you think!

http://samgine.com/click-drag-type-3/

http://puzzles.about.com/library/java/blfourrivers.htm

http://www.grand-illusions.com/articles/russian_puzzle/

http://puzzles.about.com/library/java/blrushhr.htm

http://puzzles.about.com/library/java/blhanoi.htm

http://puzzles.about.com/od/opticalillusions/ig/Watizzits-/