Maybe somebody interested, I uploaded my bot on github.
https://github.com/minim1ner/motocoin-botSorry for dirty-code

Dirty-fix for chain branching issue included.
It is what you name it "undeniable" one, but there is nothing special except using rand() in nonce selection.
It's seems that this bot will end it's life cycle pretty soon, but this is like first version I made and it could be easily improved to compete with current generation of bots.