I have encountered multiple bullet cheaters @YellowVenom (I believe after enquiring that they use a bot called chessbot that automatically plays moves and the moves are customisable). Anyway, I personally think it is unethical to even cheat against a bot but am not sure about the regulations in this case.
Most Recent
Forum Legend
Following
New Comments
Locked Topic
Pinned Topic
@HollyFlax As a staff of chess.com, I must say the answer to this is no. Although it hurts nobody, but the practise itself is strictly banned on chess.com. This is because at the end of every game our server examines your game accuracy as well as your opponent and your ratings. If multiple games seem to be suspicious, there will be a staff coming to verify if the player has cheated or not.
If you really want to test out your engine, I suggest you log out of your account first and then play the bot anonymously so that it doesn't affect your account. I hope you find this useful.