Diagonal Twins eleven piece interlocking puzzle
18 January 2005Edward Hordern IPP Puzzle Exchange – Helsinki, Finland. August 2005. 147 made. Presented by Brian Young. Made by Brian Young @ Mr Puzzle Australia. Designed…

The puzzle is to assemble the four pieces into a square. Then using all four pieces try to make the other 12 shapes on the enclosed sheet which increases the difficulty rating to 3.
The concept of dissecting a square into a number of pieces to make a puzzle may at first appear to be a simple one but none-the-less it must be a good one because as early as 1749 the French toy catalogue Les Amusemens was publishing them. Each piece is identical and has two right angles just to confuse!
Size 155mm x 70mm x 20mm (each piece 75mm x 70mm x 10mm) Included is this sheet with 12 shapes to make with the Just Have Patience pieces.