BTN range vs CO open at 20 bb (5-max)
When CO opens and you're BTN, with an effective stack of 20 bb in a 5-max tournament, the solver plays 30.8% of its hands (call 23.3%, raise 5.20 bb 3.9%, all-in 3.6%) and folds 69.2%. 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 30.8% of the hands that reach this spot, about 408 combos out of 1,326.
- Call is the main action for 24.7% of hands: from 99 down to JTo, the weakest hand played this way.
- Raise is the main action for 2.7% of hands: from AA down to 22, the weakest hand played this way.
- All-in is the main action for 2.9% of hands: from TT down to T9s, the weakest hand played this way.
What changes at 17 bb (10 hands change action)
- KK: raise here, all-in at 17 bb
- JJ: raise here, call at 17 bb
- 99: call here, all-in at 17 bb
- AQs: call here, all-in at 17 bb
- AQo: call here, all-in at 17 bb
- QTs: call here, all-in at 17 bb
What changes at 25 bb (14 hands change action)
- TT: all-in here, call at 25 bb
- AKs: all-in here, raise at 25 bb
- AKo: all-in here, raise at 25 bb
- KQs: all-in here, call at 25 bb
- A9s: call here, raise at 25 bb
- QJs: all-in here, call at 25 bb
Frequently asked questions
Which hands should you play from BTN, facing an open, at 20 bb in 5-max?
The solver plays 30.8% of the hands that reach this spot, about 408 combos out of 1,326. Call is the main action for 24.7% of hands: from 99 down to JTo, 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 raise, 33 raise, 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.
Short stack: the push/fold chart, from 5 to 20 bb
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.