progressCO open range at 28 BB
8-max MTT · ante 12.5 % · folded to the Cutoff · chip EV
How CO opens at 28 BB
When the action folds to the Cutoff with 28 big blinds (8-max MTT with ante), the book plays 34% of hands: a raise to 2 BB with 34%. The other 66% fold.
Always raised: AA, AKs, AKo, AQs, AQo, AJs, AJo, ATs, ATo, A9s, A9o, A8s, A8o, A7s and 57 more.
Mixed hands (the book splits them between actions): A5o, K9o, Q3s, T9o.
At this depth everything opens with a small raise; all-ins appear only later, against 3-bets.
Next to it at 28 BB: HJ 28%, BTN 46%. 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): K9o 54%, Q3s 38%, A5o 78%. These are the hands worth drilling, because a small change in the opponents or the stack flips them.
What changes around 28 BB
The book opens 34% of hands here, 34% at 27 BB and 35% at 29 BB. Going from 27 BB to 28 BB, no hand crosses the 50% line; only the frequencies shift.
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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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