Unsolvable levels

[Aurora]

Looks like most if not all of the DX Boulderdash levels have impossible levels too due to insane amoeba growth rates x.x

[Dirkimops]

Not sure if it was mentioned anywhere already:
EMC Club / Emerald Mine II (Kingsoft) / Level 73: 66 Emeralds are needed, but only 56 are available.
And indeed noone made it to the hall of fame there so far.