How can I beat Isabel in a game?

I've been working my way through the bots on the site, and have been having trouble with Isabel (1600).

I can frequently beat Nelson(1300) due to his aggressive use of the queen. Antonio(1500) and I have pretty good games - he often wins, and his commentary is polite and jovial, but I can sometimes pull out the win.

When I play Isabel (1600), it seems I never have a chance. She looks friendly enough judging from her avatar, and she says seemingly nice things, but I can read between the lines and I think she's being sarcastic and mocking me. She also says "Jaque!" when she puts my king in check, which really makes my blood boil.

I tried a few games with Wally(1800) and lost as well, but the games seemed closer despite his higher rating. It occurred to me that the bots might all have different plying styes in addition to their rating differences, such as the aforementioned fact that Nelson(1300) likes to use the queen.

Does anyone here play Isabel with success? Any pointers at beating her?