SB range vs CO open at 25 bb (4-max)
When CO opens and you're SB, with an effective stack of 25 bb in a 4-max tournament, the solver plays 45.7% of its hands (call 35.1%, raise 6.40 bb 4.4%, all-in 6.2%) and folds 54.3%. 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 45.7% of the hands that reach this spot, about 606 combos out of 1,326.
- Call is the main action for 36.7% of hands: from 77 down to 76s, the weakest hand played this way.
- Raise is the main action for 2.6% of hands: from AA down to 22, the weakest hand played this way.
- All-in is the main action for 5.6% of hands: from TT down to 98s, the weakest hand played this way.
- Conversely, the solver plays hands ranked outside the top 100, such as 86s, 76s.
What changes at 20 bb (19 hands change action)
- 77: call here, all-in at 20 bb
- AJs: call here, all-in at 20 bb
- AJo: call here, all-in at 20 bb
- 66: call here, all-in at 20 bb
- A9s: raise here, call at 20 bb
- KJs: all-in here, call at 20 bb
What changes at 30 bb (24 hands change action)
- AQs: all-in here, raise at 30 bb
- 77: call here, raise at 30 bb
- KJs: all-in here, call at 30 bb
- KTs: call here, all-in at 30 bb
- QTs: call here, all-in at 30 bb
- A4o: call here, fold at 30 bb
Frequently asked questions
Which hands should you play from SB, facing an open, at 25 bb in 4-max?
The solver plays 45.7% of the hands that reach this spot, about 606 combos out of 1,326. Call is the main action for 36.7% of hands: from 77 down to 76s, 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 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.