Klotski Puzzle
Klotski
Klotski is a classic sliding block puzzle.
The goal is to slide the red block into the opposite end.
This puzzle is dicussed in Scientific American, March 1995 (Volume 272 Number 3 Pages 108-110), Mathematical Recreations by Ian Steward.
Loyd's Lunacy
Loyd's Lunacy is another block-sliding logic puzzle. The goal is to slide the large square from upper right corner to upper left. Author is Chip Moody. Written in 1990 but still works great under Mac OS X Classic in 2003. This program has a very funny “About” dialogue.
Dirty Dozen
Dirty Dozen is a block-sliding logic puzzle. Writen by Nick Triantos in 1993 but still works under Mac OS X Classic in 2003.