PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB 4-bet 11.5bb

BB vs SB 4-bet 11.5bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · SB opens 2.5bb, BB 3-bets to 5bb, SB 4-bets to 11.5bb · Big blind to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 17.14bbYour cards?
5bb
11.5bb

Tap your two cards.

Big blind's range

870 of 1,326 combos get here
Fold 63.4%Call 33.4%All-in 99.84bb 3.2%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when SB opens 2.5bb, BB 3-bets to 5bb, SB 4-bets to 11.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

SB opens 2.5bb, BB 3-bets to 5bb, SB 4-bets to 11.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 63.4%, calls 33.4% and goes all-in 99.84bb 3.2%. Always call: AA, 44-TT, ATs-AQs, A5s-A6s, K8s+, K5s-K6s, Q9s+, J9s+, T8s+, 98s, 96s, 86s+, 75s+, 64s+, 54s, 43s, ATo-AQo, KQo. Mixed: JJ-KK, AKs, A7s-A9s, A2s-A4s, K3s-K4s, Q7s-Q8s, Q5s, Q2s, J8s, J6s, T7s, 95s, 85s, 83s, 74s, AKo, JTo, T9o.

Always fold
Q3s, J2s-J4s, T5s, T2s-T3s, 93s, 84s, 82s, 63s, A9o, A4o-A6o, A2o, K2o-K6o, Q8o, Q6o, Q3o-Q4o, J8o-J9o, J4o-J6o, T6o-T8o, T4o, 96o-97o, 76o, 53o
Always call
AA, 44-TT, ATs-AQs, A5s-A6s, K8s+, K5s-K6s, Q9s+, J9s+, T8s+, 98s, 96s, 86s+, 75s+, 64s+, 54s, 43s, ATo-AQo, KQo
Always all-in 99.84bb
No hand plays this every time
Mixed
JJ-KK, AKs, A7s-A9s, A2s-A4s, K3s-K4s, Q7s-Q8s, Q5s, Q2s, J8s, J6s, T7s, 95s, 85s, 83s, 74s, AKo, JTo, T9o
Settings: 4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). A jackpot fee on bigger pots is not in this solve, so lines that build big pots may be slightly too loose. Bet sizes are the solved ones; a size that is not here plays like the nearest one.

Fits exactly: no game we have checked.

Close: CoinPoker cash with antes NL50 (rake before the flop in 3-bet pots there, none here).

Rake sources: the ante from 93 of our own CoinPoker hands at $0.25/$0.50 with a $0.08 ante, played 2026-09-30; the caps and the preflop rule from coinpoker.com/games/texas-holdem/, fetched 2026-10-31.