progressBB defense vs CO open at 60 BB
8-max MTT · ante 12.5 % · Cutoff opens, small blind folds · chip EV
How the BB defends at 60 BB
Facing a Cutoff open to 2.1 BB (small blind folds) with 60 big blinds, the big blind folds only 23% of hands, calls 64%, 3-bets to 10 BB with 13%. 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, AQs, AQo, AJs, AJo, KK, KQs, QQ, JJ, TT, 99, 88 and 1 more.
Folded: K2o, Q6o, Q5o, Q4o, Q3o, Q2o, J3o, J2o, T5o, T4o, T3o, T2o and 9 more.
Against other openers at 60 BB the big blind continues with: vs BTN 87%, vs HJ 77%, vs LJ 74%, vs UTG+1 73%, vs UTG 70%. 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): K3o 48%, 63o 48%, J5o 56%, Q7o 64%, 52o 34%, J4o 30%, plus 1 more mixed hands. These are the hands worth drilling, because a small change in the opponents or the stack flips them.
What changes around 60 BB
The book continues with 77% of hands here, 78% at 55 BB and 73% at 70 BB. These leave it: K3o, 63o.
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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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