The "Guest flight" at HRLGC tournaments uses a dynamic handicapping system called Callaway. Using this system, we take the scorecard you turn in after a tournament and use your scores on various holes to calculate a one-day handicap which can be used to convert your gross score into a net score. Each player in the Callaway Flight has this net score calculated, and the winner of the flight will be the person with the lowest net score.
The actual computation of the handicap is rather complex, and depends on a magic table containing net scores. The procedure is to look up your score in that table, and get from that table two numbers:
The first step is to use #1 above (number of holes) and then look for the largest scores on your scorecard, with two constraints:
Once you have the holes identified, you add up the strokes on the holes corresponding to the number of high holes to consider. When you have that subtotal you add or subtract the required adjusted strokes from #2 above. The grand total at this point will be the handicap index to be used that day to subtract off from your score to get a net score.
There are other subtleties associated with the Callaway handicapping system but this is enough to give you an idea of what is going on. We have this method captured in our computer program we use to do scorekeeping after a tournament round, so can apply this method easily and repeatably as necessary.