Einstein Puzzle is a great, free cross-platform, open-sourced remake of DOS classic shareware gem Sherlock, which was in turn inspired by a puzzle devised by Albert Einstein, who supposedly claim that only 2% of people in the world can solve it.Your goal in the game is to open all cards in 6x6 square. To do this, you have to deduce the correct layout from a few hints that describe the relationships between card positions. Version 2.0 of this freeware underdog features sound support, ability to add customs graphics to the game, and on-line rules. If you enjoy deduction-based brainteasers a la Mastermind with no time limits, Einstein Puzzle is well worth your time and spot as a permanent resident on your hard drive. Recommended to puzzle fans everywhere.