K2 used to be one of a few chess engines badly ported to Android (like for instance Simplex). Latest version i'd known was 0.75 and it played very weird in Rapidroid, requiring many adjudications.
Unlike many others which just exit when the PV score is too high or too low, K2 used to resign by the usual "resign" command which is perfectly acknowledged by the GUI. A little problem here was that K2 decides to resign when winning instead of when losing, even when it comes very close to checkmating the opponent.
Besides, it lost several games where the PV score dropped suddenly from almost winning to clearly losing during middle game stage. The compile has serious issues indeed. The extremely low ELO of ~1450 puts the problem into numbers, given that CCRL rating of K2 is around 2500.
After this short session of complaints, let me express my high hopes about the new K2 version ported to Android, not by Jim Ablett this time but probably by its own author Sergey Maus. A few bullet matches have already shown that K2 v0.83 is free of bugs and will probably deliver 2400+ ELO on Android.
I thank Alex for notifying me about the release and i can't wait to watch K2 causing some chaos in the relevant ELO segment.
Download K2 v0.83 for arm5: HERE