John Good's very clever and very simple "worst day scoring adjustment" allowed you effectively to drop a day, but in a way that worked with devaluation. It was in the rules for many years, but nobody ever used it, so it got dropped in a simplification effort. If any contest wants to try it, the rule is sitting there and implemented in the scoring program, so ask for a waiver. I won't explain again here how it works, but yes it does take in to account day devaluation, and short contests.

John Cochrane