• Paperweight
• To Add or to Multiply
• Affine Mess
• Ancient Messages
• Chips Challenge
• Coffee Central
• Machine Works
• Magic Sticks
• Mining Your Own Business
• Mummy Madness
• Pyramids
• Trash Removal
• Mice and Maze
• Multiple Morse Matches
• Maya Calendar
• Water Shortage
• Puzzle
• Reliable Programs
• Binary Stirling Numbers
• Project File Dependencies
• No Change
• Subsequence
• Left labyrinths
• Crazy Search
• Celebrity jeopardy
• Sherlock Holmes
• Payment System
• Word Puzzles
• Water Treatment Plants
• Stargates
• Men at work
• Square dance
• Football
• Rent your airplane and make money
• Who’s next?
• Computer
• Help R2-D2!
• Phony primes
• Roof
• Stormy Versailles
• Charles Frédéric Gros
• Count wireless Links
• Fighting the Heat
• Fighting the Heat II
• Find the Walls
• War
• Now or later
• Crime
• The mysterious X network
• Bin Packing
• On Storing Clothes
• Buy or Build
• 4 Values whose Sum is 0
• Keep the Customer Satisfied
• UFO Cubes in Roswell
• Black Box
• Pixel Shuffle
• Consecutive ones
• CubesSquared
• BlindFold
• X-Plosives
• Objetive: Berlin
• Transcript
• The Right Tip
• Booby Traps
• Fire Lane
• Gap
• BEATBIT
• PresterJohn
• Robotruck
• Jumping Hero
• Board Games
• The Bridges of Kölsberg
• The Finest Chef
• IP-TV
• Ladies’ Choice
• A Benevolent Josephus
• A General Recurrence Relation
• The Juice Shop
• Minimal Cover of Prime Implicants
• Perfect Numbers
• Rubik’s Cube
• Sequence Alignment
• Turn All the Lights Off
• Air Raid
• Big number
• Chat rooms
• Diamonds
• Enigmatic travel
• Find the multiple
• Get them all
• Hermes’ colony
• Searching Sequence Database in Molecular Biology
• Radar Installation
• Machine Schedule
• Calling Extraterrestrial Intelligence Again
• Tiling Up Blocks
• The Suspects
• The Geodetic Set Problem
• Elevator Stopping Plan