progressCO open range at 10 BB
8-max MTT · ante 12.5 % · folded to the Cutoff · chip EV
How CO opens at 10 BB
When the action folds to the Cutoff with 10 big blinds (8-max MTT with ante), the book plays 33% of hands: a raise to 2 BB with 0.9% and all-in with 32%. The other 67% fold.
Always all-in: AA, AKo, AQo, AJs, AJo, ATs, ATo, A9s, A9o, A8o, A7o, A6s, A6o, A5s, A5o, A4s, A4o, A3s and 38 more.
Mixed hands (the book splits them between actions): AKs, AQs, A8s, A7s, K9o, K5s, QJo, T7s, 88, 76s.
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 10 BB: HJ 28%, BTN 42%. 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): K5s 54%, K9o 78%, T7s 78%. These are the hands worth drilling, because a small change in the opponents or the stack flips them.
What changes around 10 BB
The book opens 33% of hands here, 34% at 9 BB and 33% at 11 BB. These leave it: K4s, J7s, 86s.
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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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