progressBB defense vs HJ open at 25 BB
8-max MTT · ante 12.5 % · Hijack opens, small blind folds · chip EV
How the BB defends at 25 BB
Facing a Hijack open to 2 BB (small blind folds) with 25 big blinds, the big blind folds only 21% of hands, calls 66%, 3-bets to 7 BB with 4.3% and goes all-in with 8.4%. The big blind already has one blind in the pot and closes the action, so it gets a good price.
Always 3-bet: AA, AJs, ATs, A6o.
Always all-in: AKo, AQo, AJo, A5o, QQ, JJ, 99, 88, 77.
Folded: K2o, Q6o, Q5o, Q4o, Q3o, Q2o, J3o, J2o, T5o, T4o, T3o, T2o and 9 more.
Against other openers at 25 BB the big blind continues with: vs BTN 89%, vs CO 85%, vs LJ 77%, vs UTG+1 74%, 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): Q7o 46%, J4o 38%. 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 79% of hands here, 79% at 24 BB and 79% at 26 BB. Going from 24 BB to 25 BB, no hand crosses the 50% line; only the frequencies shift. With the extra chips some former all-ins become small raises: AKs, AQs, TT.
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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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