BB defense vs SB open at 12 bb (4-max)
When SB opens, everyone else folds and you're in the BB, with an effective stack of 12 bb in a 4-max tournament, the solver plays 80.4% of its hands (call 44.8%, raise 5.06 bb 6.2%, all-in 29.4%) and folds 19.6%. 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 80.4% of the hands that reach this spot, about 1,066 combos out of 1,326.
- Call is the main action for 46.9% of hands: from 77 down to 32s, the weakest hand played this way.
- Raise is the main action for 3.0% of hands: from AA down to AQs, the weakest hand played this way.
- All-in is the main action for 29.3% of hands: from 88 down to K2o, the weakest hand played this way.
- Conversely, the solver plays hands ranked outside the top 100, such as J6o, J2s, 96s, Q2o.
What changes at 15 bb (13 hands change action)
- QJs: all-in here, call at 15 bb
- K8s: all-in here, call at 15 bb
- QJo: all-in here, call at 15 bb
- K7s: all-in here, call at 15 bb
- K8o: all-in here, call at 15 bb
- K5s: all-in here, call at 15 bb
Frequently asked questions
Which hands should you play from BB, facing an open, at 12 bb in 4-max?
The solver plays 80.4% of the hands that reach this spot, about 1,066 combos out of 1,326. Call is the main action for 46.9% of hands: from 77 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 all-in, 33 all-in, 44 all-in, 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 all-in, A3s all-in, A4s all-in, A5s all-in.
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
- BB defense vs CO open at 12 bb (4-max)
- BB defense vs BTN open at 12 bb (4-max)
- BB calling range vs CO all-in at 12 bb (4-max)
- BB calling range vs BTN all-in at 12 bb (4-max)
- BB calling range vs SB all-in at 12 bb (4-max)
- BB range vs CO limp at 12 bb (4-max)
- BB range vs BTN limp at 12 bb (4-max)
- BB range vs SB limp at 12 bb (4-max)
Equilibrium computed by the Exploit It solver in chip-EV, antes included, open size 2 bb, a little more at deep stacks (up to 2.5 bb on the button at 100 bb), 2 to 3.5 bb from the SB. EVs of actions the equilibrium does not play are indicative: play the frequencies.