this kata should be 6 kyu if the math at it was obvious.

Agree

Thanks!

querying the length of a list is a O(1) operation, so storing it makes no difference. The only reason to replace it with a variable might be to increase readability, but that's personal preference.

I think you probably need to account for both robots running out of attacks without a KO :)
This could result in an infinte loop.

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It qualifies recursion practice ;-)

I agree.... This may be much easier for anyone who has written a compiler or taken a compiler class (I have not).

I set a goal of solving one kata a day of thinking I could devote a couple of hours each day. After spending over 6 hours solving this one, I'm rethinking how practical that goal is.

thank you!!!

Absolutely, harderst 5th kyu Algorithm i ever did by quite a margin actually.
I did not use regex, it was insanely hard, almost like i was writting an A.I lol.