Three Keys

Three Keys is a 2D 3-piece symmetry puzzle designed by Alexander Magyarics.  Each piece consists of 2 conjoined squares with one of the squares missing a corner.  And the corner that is missing is different for each piece.  The goal is make a symmetric shape but the type of symmetry is not specified.  There is only a single solution.  To be quite honest, I usually pick out the 3-piece puzzles from the 2-do 2-D symmetry pile first and then the single solution ones from those.  Of course that ends up leaving me with an ever increasingly daunting pile of shame.

At first glance, Three Keys reminded me of Hangers and I was all set for an easy solve thinking that the solution would be similar.  Yes, I never learn.  The solution was not similar and I ended up having to think about this one after I couldn’t cram it into the Hangers mold.  I tried a couple of strategies before alighting on the winning combination.  I didn’t find it as difficult as hangers but it was still a good challenge. 

My copy of Three Keys is 3D printed by Alexander but you can also get a laser-cut acrylic version from Nothing Yet Designs.