Designer: Osanori Yamamoto

This puzzle measures: 55 mm x 55 mm x 55 mm

Material: Zebrano / Purpleheart

Kevin Sadler wrote about it:

“Another wonderful 3×3 cube packing puzzle from the amazing brain of Osanori Yamamoto. My copy has been beautifully made by Pelikan from Zebrano with Purpleheart pieces.The holes in the box are interesting here. The larger hole is just a single layer high but quite extensive (taking up 4/9 of the top layer) which severely constrains the possible assemblies. There are also 2 more holes in the box which must be filled at the end and these holes are the opposite corners from the main one which makes finding the finished assembly much more difficult. This difficulty is compounded by the complexity of the pieces. I struggled to get them to fit together at all initially and then getting all the opposite corners filled in any potential shape proved really tough. Having found just a few potential assemblies, I realised that every single time one of the pieces couldnt fit through any of the openings. After a few days of attempts I wondered whether Osanori-san had been up to his old rotational tricks and started looking for them. The dimensions and size of the pieces made this very hard to find but eventually I found a rotational solution and was really pleased with myself. Afterwards, out of interest I wanted to see if there were any assemblies that fitted inside but didn't fulfil all the hole filling requirements and entered the puzzle into Burrtools and to my utter horror I saw that I had totally failed! There IS an entirely linear solution to the puzzle. I made sure that I didn't look at it on my computer and spent another 3 days before finding the true solution. Either this is a brilliant puzzle or I'm really quite dense! You choose. This is a brilliant design which seriously challenged me.”