PokerSolver
PokerSolver/4-max · 80bb · 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) · 80bb · SB opens 2.5bb, BB 3-bets to 5bb, SB 4-bets to 11.5bb · Big blind to act

4-max · 80bb · 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

910 of 1,326 combos get here
Fold 61.2%Call 32.5%All-in 79.84bb 6.3%
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 80bb?

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, 80bb: the big blind (BB) folds 61.2%, calls 32.5% and goes all-in 79.84bb 6.3%. Always call: AA, 33-99, AJs, K9s+, K6s-K7s, K4s, Q9s+, Q7s, JTs, J8s, T8s+, 97s+, 87s, 75s+, 65s, 54s, 43s, ATo-AJo, KJo+. Always all-in 79.84bb: A8s, AKo. Mixed: TT-KK, AQs+, A9s-ATs, A2s-A7s, K3s, Q8s, Q3s-Q4s, J9s, 96s, 86s, AQo, A9o.

Always fold
J6s, J4s, T5s, T2s, 92s-93s, 83s-84s, 72s, A2o-A4o, K9o, K2o-K6o, Q3o-Q5o, J7o+, J3o-J5o, T9o, T4o-T7o, 98o, 96o, 85o-86o, 75o, 64o
Always call
AA, 33-99, AJs, K9s+, K6s-K7s, K4s, Q9s+, Q7s, JTs, J8s, T8s+, 97s+, 87s, 75s+, 65s, 54s, 43s, ATo-AJo, KJo+
Always all-in 79.84bb
A8s, AKo
Mixed
TT-KK, AQs+, A9s-ATs, A2s-A7s, K3s, Q8s, Q3s-Q4s, J9s, 96s, 86s, AQo, A9o
Settings: 4-max · 80bb · 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, 80bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.98). 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.