progressCO open range at 20 BB
8-max MTT · ante 12.5 % · folded to the Cutoff · chip EV
How CO opens at 20 BB
When the action folds to the Cutoff with 20 big blinds (8-max MTT with ante), the book plays 31% of hands: a raise to 2 BB with 31%. The other 69% fold.
Always raised: AA, AKs, AKo, AQs, AQo, AJs, AJo, ATs, ATo, A9s, A9o, A8s, A8o, A7s and 51 more.
Mixed hands (the book splits them between actions): Q5s, J7s.
At this depth the open is a small raise, with some hands going all-in directly.
Next to it at 20 BB: HJ 26%, BTN 41%. Seats closer to the button open more here, because fewer players are left to wake up with a big hand.
Closest decisions (the book opens them only part of the time): J7s 62%, Q5s 78%. These are the hands worth drilling, because a small change in the opponents or the stack flips them.
What changes around 20 BB
The book opens 31% of hands here, 31% at 19 BB and 32% at 21 BB. Going from 19 BB to 20 BB, no hand crosses the 50% line; only the frequencies shift. With the extra chips some former all-ins become small raises: 33.
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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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