progressCO open range at 40 BB
8-max MTT · ante 12.5 % · folded to the Cutoff · chip EV
How CO opens at 40 BB
When the action folds to the Cutoff with 40 big blinds (8-max MTT with ante), the book plays 35% of hands: a raise to 2.1 BB with 35%. The other 65% fold.
Always raised: AA, AKs, AKo, AQs, AQo, AJs, AJo, ATs, ATo, A9s, A9o, A8s, A8o, A7s and 58 more.
Mixed hands (the book splits them between actions): A6o, A5o, K9o, Q2s, J6s, 98o, 96s, 65s.
At this depth everything opens with a small raise; all-ins appear only later, against 3-bets.
Next to it at 40 BB: HJ 28%, BTN 48%. 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): A5o 48%, J6s 54%, 96s 56%, 65s 30%, 98o 28%, K9o 80%. These are the hands worth drilling, because a small change in the opponents or the stack flips them.
What changes around 40 BB
The book opens 35% of hands here, 35% at 38 BB and 35% at 45 BB. Compared with 38 BB, these hands come into the range: 96s.
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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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