I would consider many scenarios impossible. How do you proceed when 2 bishops are on the same diagonal protecting each other? That was what I got after capturing the initial horse.

It is possible, just saying that I can't do it, and there's no logic behind it.

You just have to be lucky and stumble upon a sequence that allows you to surive.

The RNG is seeeded though, always same seed, so you can determinarically explore all moves and find some sequences that lead to higher scores.