progressCO open range at 8 BB
8-max MTT · ante 12.5 % · folded to the Cutoff · chip EV
How CO opens at 8 BB
When the action folds to the Cutoff with 8 big blinds (8-max MTT with ante), the book plays 35% of hands: all-in with 35%. The other 65% fold.
Always all-in: AA, AKs, AKo, AQs, AQo, AJs, AJo, ATs, ATo, A9s, A9o, A8s, A8o, A7s, A7o, A6s, A6o, A5s and 52 more.
Mixed hands (the book splits them between actions): T9o.
At this depth most of the game is push or fold — a small raise is kept only for a few hands that want a call.
Next to it at 8 BB: HJ 31%, BTN 45%. Seats closer to the button open more here, because fewer players are left to wake up with a big hand.
Borderline hands: none. At this stack every hand is either clearly in or clearly out, so the chart is easy to memorise.
What changes around 8 BB
The book opens 35% of hands here, 34% at 9 BB.
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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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