Stratified games produce more than one set of winners.
How does stratification work?
The field is divided into 2 or 3 strata (depending on how many in each strata are attending the game), each with predetermined masterpoint limitations. The stratum in which a pair plays is determined by the player in the partnership who has the more masterpoints. That is, if one player is an A and one is a C, their partnership is an A.
After the points at the end of the game are tallied, all pairs are ranked in the top stratum. The pairs in the top stratum are eliminated in determining the ranks in Stratum B, and both the A and B scores are eliminated in determining the ranks in Stratum C. It is possible for Stratum B and C pairs to win or place in higher strata, but Stratum A pairs are eligible only for Stratum A awards.
Essex Bridge Center determines the masterpoint limitations for each stratum in club games. For Unit Games, such as STAC or Sectional Tournaments at Clubs, and various ACBL-Wide Games which are held at Essex Bridge Center, the masterpoint limitations for each stratum are determined by the sponsoring entity.