The combat routine is not working properly in the case of one-on-one when both ships hp are reduced to zero. In such case, according to the manual, the attacker wins and survives with 1 hp. In practice, the attacker survives with ALL its hit points. I have experienced several cases where an inferior ship was able to take out a series of superior ships this way in one round and end up with more hp than it began with. Clearly a serious bug. In my opinion, even the correct routine gives too big an advantage to the attacker. A better solution in my opinion would be that both ships are destroyed.