progressBB defense vs HJ open at 19 BB
8-max MTT · ante 12.5 % · Hijack opens, small blind folds · chip EV
How the BB defends at 19 BB
Facing a Hijack open to 2 BB (small blind folds) with 19 big blinds, the big blind folds only 20% of hands, calls 67%, 3-bets to 6 BB with 0.1% and goes all-in with 13%. 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, AQs, AQo, AJs, AJo, ATs, A5o, KK, K6o, QQ, JJ, TT, 99, 88 and 6 more.
Folded: Q6o, Q5o, Q4o, Q3o, Q2o, J3o, J2o, T5o, T4o, T3o, T2o, 94o and 8 more.
Against other openers at 19 BB the big blind continues with: vs BTN 85%, vs CO 84%, 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): K2o 38%, J4o 36%. These are the hands worth drilling, because a small change in the opponents or the stack flips them.
What changes around 19 BB
The book continues with 80% of hands here, 80% at 18 BB and 80% at 20 BB. These leave it: K2o. Some hands switch to an all-in: Q9s, Q9o.
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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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