Sliding Block Puzzle
#1: Simplicity [18]
#2: Two Bits [24]
#3: Two Pair [31]
#4: Final Dash [69]
#5: Geometry Lesson [64]
#6: Industrial Disease [86]
#7: Through the Arch [78]
#8: Double Arch [73]
#9: Windows Security
#10: Euclid's Revenge [109]
#11: Pas de Deux [87]