Triple 4

Kevin Sadler wrote about it:

“Oh yes! I love it when Jakub brings out more of these. Osanori is the master of the “simple” packing puzzle. Simple because it is just a small volume to be packed (and often not even fully packed) usually with pretty large entry holes to get the pieces through plus a hole in the opposite side to allow more room for manoeuvring. My version of Triple 4 is made with a Mahogany box and Ipe pieces. It’s quite lovely! Triple 4 has a giant big entry hole so maybe should be relatively easy? Not for me it’s not! The pieces are relatively complex placing real constraints on the ability to insert them and the diagonal cuts for the hole is a significant restriction to movement. With only a single voxel clear at the opposite side, this made using it to make room rather more complex than expected. Making a cube shape outside of the box was remarkably easy – too easy in fact! I found loads and loads of cubes and many of them met the criteria to fill the holes in the box (after solving it, I put the shape with restrictions into burrtools and there are 26 possible cubes). This approach was going to have to be modified. Maybe I should start with looking at the restrictions for the entry method? Yes, that might just help. After about 4 hours whilst watching TV with Mrs S, I had a major breakthrough and it was solved! Yesssss! Brilliant design!”