progressBB defense vs UTG+1 open at 25 BB
8-max MTT · ante 12.5 % · UTG+1 opens, small blind folds · chip EV
How the BB defends at 25 BB
Facing a UTG+1 open to 2 BB (small blind folds) with 25 big blinds, the big blind folds only 26% of hands, calls 65%, 3-bets to 7 BB with 4.3% and goes all-in with 3.8%. The big blind already has one blind in the pot and closes the action, so it gets a good price.
Always 3-bet: AA, AKs, AQs, QQ.
Always all-in: AKo, TT, 99.
Folded: K5o, K4o, K3o, K2o, Q7o, Q6o, Q5o, Q4o, Q3o, Q2o, J6o, J5o and 16 more.
Against other openers at 25 BB the big blind continues with: vs BTN 89%, vs CO 85%, vs HJ 79%, vs LJ 77%, vs UTG 73%. The later the opener, the wider its range, and the more the big blind defends.
Closest decisions (the book continues with them only part of the time): K6o 52%, 95o 40%. These are the hands worth drilling, because a small change in the opponents or the stack flips them.
What changes around 25 BB
The book continues with 74% of hands here, 74% at 24 BB and 74% at 26 BB. These leave it: 95o. With the extra chips some former all-ins become small raises: AKs, AQo, KK, QQ, 88.
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Numbers come from the progressGTO solution book (v14, chip EV, 8-max, ante 12.5 %): our own equilibrium computation with a modelled postflop. It is an approximation, not an exact solution, and it keeps improving. Hover or tap a hand to see its exact frequencies.
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