Poker Glossary
MDF
Minimum Defense Frequency — how often you must continue against a bet so your opponent’s zero-equity bluffs cannot profit automatically. The formula is pot ÷ (pot + bet): versus a half-pot bet, defend about 67% of your range; versus a full-pot bet, 50%. MDF is a theoretical anchor rather than a law — against players who never bluff, folding “too much” is simply correct.
At the table
They bet $50 into $100 on the river. MDF = 100 ÷ 150 ≈ 67% — if you fold more than a third of your range there, pure bluffs print against you on autopilot.
House note
Drill the frequencies →← Full glossary — all 52 termsMDF is the math that says “stop folding” in a language your comfort zone hates.
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