The Fisher style puzzle has been in production since the 1980s. YJ's version will be enjoyed by fans of puzzles - particularly those who have mastered 'beginners method' on 3 x 3 and wish to apply their new skills to something a whole lot more baffling! Whilst using a very similar mechanism to the standard 3 x 3 at its heart, corner, centre and edge piece are confusingly orientated and defined (in fact corners are in the middle of the cube! Confused yet?). YJ Cube's Fisher puzzle is ideal for cube-fans who want to try new challenges.