progressBB defense vs HJ open at 18 BB
8-max MTT · ante 12.5 % · Hijack opens, small blind folds · chip EV
How the BB defends at 18 BB
Facing a Hijack open to 2 BB (small blind folds) with 18 big blinds, the big blind folds only 20% of hands, calls 67%, 3-bets to 5.5 BB with 0.4% and goes all-in with 12%. The big blind already has one blind in the pot and closes the action, so it gets a good price.
Always all-in: AA, AKs, AKo, AQo, AJs, AJo, A5o, K6o, QQ, JJ, TT, 99, 88, 77, 66, 55 and 2 more.
Folded: Q7o, Q6o, Q5o, Q4o, Q3o, Q2o, J3o, J2o, T5o, T4o, T3o, T2o and 9 more.
Against other openers at 18 BB the big blind continues with: vs BTN 84%, vs CO 83%, vs LJ 77%, vs UTG+1 75%, vs UTG 74%. 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): K2o 62%, J4o 34%. These are the hands worth drilling, because a small change in the opponents or the stack flips them.
What changes around 18 BB
The book continues with 80% of hands here, 80% at 17 BB and 80% at 19 BB. Compared with 17 BB, these hands come into the range: K2o. Some hands switch to an all-in: 22.
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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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