Due to some confusion on how to produce winning fighters consistently, we are offering this tutorial to help insure that all (or at least most) of your sparing matches are successful. This will require lots of dedication on the part of the trainer to produce winners consistantly. Just because you have a fighter from a winning line does not guarantee victory. Victory depends also on committed training. Just like Olympic athletes.
First, fighters are at their prime when they are around 8 and 9 months of age or slightly older. It is at this time that their teeth are sharpest, their scales are hardest and their bones and muscles are strongest. You will generally have 1 month of consistant victory from siblings of this line if trained well.
Most people already know that siblings from one spawn may be of different colors and that each color type has it's own fighting style generally. It may be tail biting, side attack or some other method, but still will be the same. Most people think that if one color type defeats another spawn, then all of the winner's siblings will defeat the other. That is only true if they are trained well. The best way to know the age and fighting style of each fish is to ask the breeder or seller. This is important because a fighter's prime fighting time is about 1 month only. After that, even the best fighter has dull teeth from all the fighting. Usually it is best to retire the fighter at this point for breeding or as a pet. But if you let him rest in water with almond leaf (dried banana leaf is traditional, but now out of favor for almond leaf) without seeing other males for 2 weeks and then train again for 2 weeks, his teeth will be sharp again and you can fight him for one more month or so.
The key here is to always have a fighter in it's prime and ready to fight. So when one champion starts to tire and needs rest, you will have another one ready to fight and when that fish tires, you should have another fish conditioned and ready along with the first champion. You need to schedule your training so that you are always training a new fish every two weeks. Some fish will be fighting, some resting and others training. But you as the trainer must train your fighters along this schedule to keep winners ready at all times. This means that you will be training 1/3 of your fighters at any given time. It is good to have close relationship with a reputable breeder who is always producing more lines. That way you will have a steady supply of fresh fighters in their prime to always ensure victory in the arena.