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It is quite likely this is the coolest desk in the world! (Well, even if that's hyperbole, there are lots of other beautiful puzzles and woodworks in Kagen Schaefer's gallery, including some of his award winners from the annual Nob Yoshigahara Puzzle Design Competition.)
posted by Wolfdog on Jun 28, 2011 - 28 comments

Moving Remy in Harmony - Pixar's Use of Harmonic Functions. [more inside]
posted by Wolfdog on Apr 15, 2010 - 38 comments

The Sexaholics of Truthteller Planet - yes, it's one of those rotten logic problems, one of many that can be found at Tanya Khovanova’s Math Guide to the MIT Mystery Hunt.
posted by Wolfdog on Jan 13, 2010 - 21 comments

A gathering of puzzles including many old chestnuts but also perhaps one or two you haven't met before.
posted by Wolfdog on Dec 16, 2009 - 29 comments

Walter Randelshofer's Pretty Patterns collection (for Rubik's cubes up to 5x5x5) is one of the nicest twisty puzzle sites going. It's based on his CubeTwister software, which you can download (including a lovely OS X standalone). If you really want a treasure trove of twisty polyhedra, check out gelatinBrain's enormous collection of java applets (which unfortunately don't do so well on macs). Are those things even physically possible? Really? Mini bonus: Randelshofer also hosts an archive of fondly-remembered Amiga animations.
posted by Wolfdog on Mar 31, 2008 - 8 comments

SlitherLink - a little spatial-numerical puzzle. Here's a better exposition of the rules from the puzzle's inventors, and another collection of puzzles. Oh, and a little survey of other sneaky, snaky puzzles.
posted by Wolfdog on May 31, 2007 - 18 comments