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Lesson 7 · Solver-backed MDF in polarized spots · 24 practice questions
River bets are often polarized: nuts + bluffs, rarely medium hands. Medium hands prefer check.
Bluff-catchers beat bluffs but lose to value. Call at MDF frequency vs polarized bets.
In our HU solver spot, OOP bets pot with nuts always and mixes air. IP's bluff-catcher calls 50%.
• River bets polarize to nuts + bluffs; medium hands prefer to check.
• Call bluff-catchers up to MDF — favor those that block value and unblock bluffs.
• Over-folding makes polarized bets automatically profitable.
Solver spot (polar pot bet): river, pot=100, facing a pot-sized bet. You hold AA as a bluff-catcher vs a polarized range. Best default action?
Board: 2♣ 7♦ 9♥ J♠ 4♠
Your hand: A♦ A♣
Best action: Call
Why: ✓ You hold one pair as a bluff-catcher; vs a polarized bet, MDF = 1−100/200 = 50%, and you only need ~33% to call. Calling is right.
A polarized range is made up of strong value hands and bluffs, with medium hands checked. Big bets and overbets should be polarized so the bluffs are backed by real value.
Bluff-catching is calling with a hand that beats only the opponent’s bluffs. You keep enough bluff-catchers to meet the MDF and pick the ones that block the opponent’s value hands.
Every answer in the 699-question bank is independently verified (adversarial blind-solve) before publication.
Also train preflop: Preflop Camp (GTO preflop trainer by the same maker)