I've been a bit mean to Martin Bot
I've also been trying to achieve the six queen Checkmate against higher rated Bots. The best I've managed so far, is against Wendy, (1500) I Beat Wendy! https://www.chess.com/game/computer/333704276
I've also worked out that a five queen, full board dominating position can also be achieved.
I Beat Steve Aoki!
https://www.chess.com/game/computer/352130172