BB defense vs CO open at 70 bb (4-max)
When CO opens, everyone else folds and you're in the BB, with an effective stack of 70 bb in a 4-max tournament, the solver plays 59.1% of its hands (call 52.6%, raise 7.04 bb 6.6%) and folds 40.9%. These frequencies come from Exploit It's full preflop tree: a chip-EV equilibrium with antes, computed for every position at the table.
Each cell: the share of each action for that hand, left to right. Gray cell: hand not in the range at this point.
Key takeaways for this spot
- The solver plays 59.1% of the hands that reach this spot, about 784 combos out of 1,326.
- Call is the main action for 52.8% of hands: from TT down to 32s, the weakest hand played this way.
- Raise is the main action for 6.2% of hands: from AA down to 42s, the weakest hand played this way.
- Conversely, the solver plays hands ranked outside the top 100, such as J2s, 96s, T5s, T4s.
What changes at 50 bb (9 hands change action)
- 88: call here, raise at 50 bb
- AKo: call here, raise at 50 bb
- A9s: call here, raise at 50 bb
- KJs: raise here, call at 50 bb
- A8s: call here, raise at 50 bb
- KJo: call here, raise at 50 bb
What changes at 100 bb (4 hands change action)
- 88: call here, raise at 100 bb
- AKs: raise here, call at 100 bb
- AQo: raise here, call at 100 bb
- T8s: call here, raise at 100 bb
Frequently asked questions
Which hands should you play from BB, facing an open, at 70 bb in 4-max?
The solver plays 59.1% of the hands that reach this spot, about 784 combos out of 1,326. Call is the main action for 52.8% of hands: from TT down to 32s, the weakest hand played this way.
What should you do with small pairs (22 to 66) in this spot?
The solver's main action with each hand: 22 call, 33 call, 44 call, 55 call, 66 call.
What should you do with weak suited aces (A2s to A5s) in this spot?
The solver's main action with each hand: A2s call, A3s call, A4s call, A5s call.
How do you train on this spot?
Exploit It's free quiz deals you random hands in this exact spot and shows you the solver's answer after each choice.
Equilibrium computed by the Exploit It solver in chip-EV, antes included, open size 2 bb at 25 bb or less and 2.2 bb deeper. The model's range-width caps can make some EVs of unplayed actions optimistic: play the frequencies.