Martian Diamond - Packing Puzzle

Martian Diamond very difficult triangle puzzle for IPPEdward Hordern IPP39 Puzzle Exchange Kanazawa, Japan. August 2019. Presented by Brian Young. Designed by George Sicherman. Made by Mr Puzzle. (897 made) Youre given a tray with a diamond-shaped recess. There are 5 pieces of the puzzle already in it. Plus there is one piece outside the diamond frame. But there seems plenty of space to fit the extra piece into the frame so how can the puzzle be so difficult?Just ask Brian (Mr. Puzzle). It is! Hes played with the puzzle. Hes even made the puzzle. But hes not looked at the solution sheet yet. Only his wife Sue knows that it goes together for sure. As it stands at the moment Brians never actually solved the puzzle.The Edward Hordern puzzle exchange event is held every year at IPP. Participating puzzlers bring a new design of good quality and they proceed to fill the day by exchanging their puzzles with all the others in the room. By the time the puzzlers explain the concept of their puzzle to each other, (some with a long story and in costume!) it can take quite a while to get through the event. But he did have a lot of fun at IPP39 exchanging the puzzle with his Ray Gun in hand.Please note that the colors vary.  The puzzle is from laser-cut acrylic and is Green pieces on a Red Base OR with Red pieces on a Green base.Outer frame size: 145mm x 95mm x 6mmSolution included inside clear shrink wrap packaging.