Hello!
I'm glad to announce that today I successfully solved the 2x2x3x3 cuboid with 976 twists. You can find attached my .log file.
Because of the limited 180° twists on all cells, it was way more harder for me to solve this puzzle than the 2x2x2x3.
The most challenging tasks were to find algorithms for the following cases:
(Some of the below cases could only be solved in a view where a 2x2x3 cell was in the center.)
1) FLIP TWO EDGES
2) SWAP TWO CORNERS
3) FLIP TWO EDGES
4) SWAP TWO EDGES
Next puzzle for me will be the 2x3x3x3. I hope that will be much easier than this one. Which hypercuboid have you solved yet?
Best wishes to all hypercubists!
~Adrián