So out of curriosity, I was in something similar to this challenge in a marksmansip event. I would suggest that someone slice a log into 2 shippable parts, with a distinctive mark on each half. Each "competitor" cuts a pre-agreed number of biscuits while videotaping the cuts. The tapes, biscuits, and what's left of the log are shipped back to the Judge-member for the final decision. The Posties may not like luggin' the lumber, but it's a good way to run a race in 2 places, so long as the sawyers are gentlemen of honour, and not up to tricks. Makes ya think, doesn't it?