Use a sheet of targets similar to this one(the linked file is printable).....one sheet for each shooter....take one shot at each of the 25 targets.....hole must be inside the bold black circle...can touch but not cross into the black.
Then score good hits....if tied....Shoot till the first Bullseye is scored and the second shooter misses....if each shooter scores a bullseye...continue till the first bullseye is hit .
Think it is easy....try it at 25 Yards.
My money is on the Grand Baby!
I just thought I knew how to shoot!
.22 Rimfire Cartridges are not very precise and despite using Ruger Precision .22 Rifles and excellent scopes....the sorry things cost me lots in Beer Money!
https://accurateshooter.net/targets/ukbrtarget50.png