progressBB defense vs BTN open at 100 BB
8-max MTT · ante 12.5 % · Button opens, small blind folds · chip EV
How the BB defends at 100 BB
Facing a Button open to 2.5 BB (small blind folds) with 100 big blinds, the big blind folds only 26% of hands, calls 54%, 3-bets to 13 BB with 19% and goes all-in with 0.3%. 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, ATs, KK, KQs, KQo, QQ, JJ, TT and 4 more.
Folded: Q5o, Q4o, Q3o, Q2o, T5o, T4o, T3o, T2o, 95o, 94o, 93o, 92o and 11 more.
Against other openers at 100 BB the big blind continues with: vs CO 74%, vs HJ 73%, vs LJ 71%, vs UTG+1 67%, vs UTG 65%. 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 50%, 53o 58%, J4o 40%, 85o 40%, K4o 70%, J5o 70%, plus 3 more mixed hands. 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 74% of hands here, 71% at 80 BB. Compared with 80 BB, these hands come into the range: K3o, J5o.
Free 7-day ICM course by e-mail
One short lesson a day, each with a worked example in exact numbers: chips vs. money, the bubble factor, who feels the pressure, payout structures, satellites. No account needed.
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.
progressGTOAll rangesGuidesDaily spotICM calculatorOpen the appPrivacyTerms