As long as you fight Jade the games loops back a few matches and over and over etc.
It seems that Jinx got tired of it after he fought about 50 rounds and then ignored Jade. Then the game went on and he finished it.
This does not stop another person from getting 51 wins etc etc. The game does not get any harder..
Have a look at the recording here:
http://marp.retrogames.com/inp/xz_mk2r4 ... mame61.zip
We might have to get some limit here maybe? Only allowed to fight Jade once or something? After all it should not be possible to fight her more than once

Cheers