Minimum Defense Frequency
Poker Strategy / Tutorials, Texas Hold'em Terminology DictionaryMinimum Defense Frequency (MDF) refers to the minimum range that you theoretically need to call or raise when facing an opponent's bet in order to prevent them from making an unlimited bluff with any two cards.
MDF (Mean Defender) is a crucial concept in GTO (Game Theory Optimal), primarily used to determine how many hands a player should defend against, rather than over-folding. Solvers also frequently utilize MDF as an important reference for developing defensive strategies.
This article will provide a complete introduction to the definition of MDF, its calculation method, its relationship with Pot Odds, and its practical applications.



