progressBB defense vs UTG open at 100 BB
8-max MTT · ante 12.5 % · Under the Gun opens, small blind folds · chip EV
How the BB defends at 100 BB
Facing a Under the Gun open to 2.1 BB (small blind folds) with 100 big blinds, the big blind folds only 35% of hands, calls 59%, 3-bets to 11 BB with 5.9%. 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, AKo, KK, K5s, K3s, QQ.
Folded: K8o, K7o, K6o, K5o, K4o, K3o, K2o, Q8o, Q7o, Q6o, Q5o, Q4o and 25 more.
Against other openers at 100 BB the big blind continues with: vs BTN 74%, vs CO 74%, vs HJ 73%, vs LJ 71%, vs UTG+1 67%. 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): 74o 58%, A3o 72%, A2o 74%, A6o 80%, A4o 80%. These are the hands worth drilling, because a small change in the opponents or the stack flips them.
What changes around 100 BB
The book continues with 65% of hands here, 67% at 80 BB. Going from 80 BB to 100 BB, no hand crosses the 50% line; only the frequencies shift.
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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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