The Ten Billion Barrel is largely considered to be one of the more difficult non-twisty puzzles. Jaap Scherpuis has 2 solutions, and one was computer-generated. http://www.jaapsch.net/puzzles/nintendo.htm
is the page on Jaap's Puzzle Page. It is noted there as "extremely difficult" and I tend to agree. The basic solution involves a cycling of piece sets based on 3 algorithms, and another is based on moving pieces around with a LOT of algorithms.
Puzzle Photography Group
doctor who wrote:
I don't think I can make her pose without heavy sedation. The rendering doesn't have to be perfect, it just can't look like Oskar in drag.