I knew that I couldn’t keep ignoring it and that one of these days it would need sorting…
So, at the moment I have this, instead of this…
…and this downstairs… 
and then hopefully in a couple of weeks’ time I’ll have new carpets in 
the puzzle-cave a couple more puzzle cabinets in there, and all the 
boxes of puzzles will migrate back upstairs again
 in time for the next puzzlers’ visitation… but it’s soaking up most of 
my spare time at the moment, and the puzzles are in boxes which makes 
them a little harder to write about, so normal service is going to be a 
bit interrupted for a while, sorry…
and then hopefully in a couple of weeks’ time I’ll have new carpets in 
the puzzle-cave a couple more puzzle cabinets in there, and all the 
boxes of puzzles will migrate back upstairs again
 in time for the next puzzlers’ visitation… but it’s soaking up most of 
my spare time at the moment, and the puzzles are in boxes which makes 
them a little harder to write about, so normal service is going to be a 
bit interrupted for a while, sorry……one or two haven’t quite been packed away yet, and to be honest, the new ones keep arriving at a reasonable (although Gill might say alarming) rate anyway. So I’ll try and keep up the pretence of puzzle blogging for a little while longer.
Kagen’s Loop Box
Kagen Sound updated his
 website a while back announcing the imminent arrival of a new puzzle 
box. The Loop Box was to be a slightly scaled-down version of an earlier
 puzzle with a sliding tile locking mechanism
 – yes I know that doesn’t narrow it down an awful lot! The original 
Block Box had serious pedigree, winning both the Puzzlers’ award and the
 Jury’s First prize at the IPP22 Puzzle Design Competition… with the 
improved version (the Walnut Block box) having
 a more refined implementation of the mechanism that crammed twice the 
complexity into a similar sized puzzle. Loop Box simplifies those ideas 
down to their core and presents a lovely little puzzle with an added 
twist…
The similarities are 
pretty clear from a cursory glance: the top of the boxes all have a 
field of small sliding pieces arranged in a non-symmetric pattern, with 
the earlier versions all having a piece of two
 extending into (and beyond?) their respective frames… Loop Box on the 
other hand has all of the sliders trapped inside a frame around the 
edges… with no apparent gaps between the pieces to allow any form of 
sliding… :-)  Spot the first little challenge of
 the puzzle yet? 
I loved that little 
complication – and it confused me for a while – I knew what I needed to 
be able to do, just couldn’t see how to get there… and there’s a lovely 
little “A-Ha!” when you do…
Find the first couple 
of moves and you’re into exercising the Loop mechanism that Kagen’s used
 in this and the predecessors: a set of sliding tiles where the start 
and end positions look the same, but they aren’t
 and the crucial difference between them has unlocked the mechanism… so 
pay careful attention or you might not realise that you’ve unlocked this
 box… although the final few moves required to actually open it ensure 
that you can’t stop part way through the solution
 – I liked that bit of the design a lot!
Once you’ve conquered 
the sliders, there’s a little more to do before you can finally open the
 box – I spent an embarrassing amount of time trying to suss the final 
move… elegant simplicity doesn’t quite describe
 it well enough… I had tried quite successfully to over complicate 
things! 
It’s a lovely little 
puzzle box, beautifully made as you’d expect from Kagen… and according 
to his website, some might still be available for sale! … if you don’t 
get one of your own, have a bash at a friend’s
 copy, you’ll like it. 







