How about a "Won the battles, but lost the war" achievement for winning all your games in a tournament, but still not winning overall? This would apply to triple gammon tournaments only.
As an example, this happened to Erinity and me in different sections of Madhouse 2008 - Week 4
Possibly have a minimum number of players in a section to get the achievement, or have a separate, higher-scoring achievement for doing it with 7 or 8 players in your section?
(gem) Brug Notesblok til at se hvordan din profil vil se ud med html attributter før du tilføjer den. (kun for betalende medlemmer) (rednaz23) (vis alle tips)