User blog comment:Cinnabar The Evil Gem Chemist 55555555555555555550/Learn Something About This Wikia - Week 3 (19/04/14)/@comment-16894369-20140423120035

Well I already noticed it when I was adding a code for split difficulty - yeah, Impossible is a bit ridiculous.

Nevertheless the "impossible" grading would be added if King were to release a level that is impossible due to major glitches.

For example, when Savoury Shores was released on mobile devices, Level 316 was deemed impossible. A major glitch would unconditionally crash the game if any candy drops down the bottleneck through the teleporter.