Just need a piece of blank paper. Shoot an arrow at the approximate middle of the paper -- any stance -- from 12 yards (6 for kiddos). That first arrow is now your target. Either pull it and shoot at the hole or leave it in. Now shoot two more arrows and measure the total distance from the closest part of shaft from each following arrow to the nearest shaft side of the first arrow. Three day's tries allowed. Lowest total distance gets the call. A Robin Hooded arrow wins (risk/reward)
Tx Reb, those are really nice shots. But what I'm really amazed about is how you got TWO arrows exactly 2-3/16" from the target arrow. Very cool, actually; plus you are doing some high-tech picture manipulation, as well. I'm jealous (as a tech-neanderthal).