The original idea of this puzzle arose because of the fact, that there are already a lot of puzzles at the market with are based on the underlying structure of a cubic grid in three-dimensional space. In these puzzles either the pieces interlock with each other or they don't. In most (all?) cases you have to build a given structure or shape.

To leave the well-known cubic grid I tried using another one: a grid which uses layers of prisms. The prisms itself do have a basis of an equilateral triangle. With this grid I started designing an interlocking puzzle! To make the pieces itself not too big in size and not too complex in their shape I found out that I have to use a special "box", which prevents the pieces to be taken out too early. I wanted to create a puzzle with a "level" of at least (!) "4". This means that you have to move 4 times to get the first piece out. I decided to use 24 equilateral triangles in one layer, arranged with the outer shape of a regular sexangle. By using 3 of these layers you have a total amount of 72 triangles which you are free to combine to built the puzzle pieces. The "box" mentioned above was designed to be a bottom layer, a top layer and three (out of 6) side plates, where the pieces should be packed in:

Then it was up to me combining the single prisms together to make puzzle pieces such that they do not fall out of the box too early. After having drawn a lot of sketches, run programs to calculate other possible solutions in order to check if only the designed solution is possible, the designing process of about 3 months ended up in a 'nice' level-9-puzzle (9 moves to take out the first piece): I name it Prisgon.

The puzzle consists of 7 different pieces. Some of them only use triangular prisms in one layer (flat piece), some use two and other use all three layers.

Here you can see the puzzle partly assembled ...

... and here the puzzle in its finished state: