Bram has come up with a devilishly difficult construct here. The first piece slides out with decptive ease....after that gimme, it's nine more moves before the next piece is released. A hollow interior means maximum movement, maximum confusion and minimal hints. Starting with all pieces disassembled gives very few inferences as to a solving strategy. Overall a difficult and entertaining puzzle in a small and modest package. A solid choice. Signed and dated; most sold during IPP so availability is very limited.