progressBB defense vs HJ open at 15 BB
8-max MTT · ante 12.5 % · Hijack opens, small blind folds · chip EV
How the BB defends at 15 BB
Facing a Hijack open to 2 BB (small blind folds) with 15 big blinds, the big blind folds only 22% of hands, calls 64%, 3-bets to 5 BB with 0.3% and goes all-in with 14%. 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, AJo, ATs, ATo, A9o, A5o, A4o, KK, QQ, Q9o, JJ, TT, 99 and 5 more.
Folded: K2o, Q7o, Q6o, Q5o, Q4o, Q3o, Q2o, J3o, J2o, T5o, T4o, T3o and 10 more.
Against other openers at 15 BB the big blind continues with: vs BTN 79%, vs CO 79%, vs LJ 78%, 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): J5o 52%, K3o 44%. These are the hands worth drilling, because a small change in the opponents or the stack flips them.
What changes around 15 BB
The book continues with 78% of hands here, 77% at 14 BB and 79% at 16 BB. Compared with 14 BB, these hands come into the range: J5o. Some hands switch to an all-in: 44.
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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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