Thanks tikemaan. I have beaten her yesterday and today. (Today it only took me two games). Indeed, as some already mentioned, Isabel isn't as strong in the endgame. If you survive until there, you will be fine.
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Here I beat Isabel. Not a very good game but still did the trick 😁
https://youtu.be/s0xEJk8GqYk?si=AoL8OAO6nVK2BOsf