PokerSolver
PokerSolver/5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB 4-bet 11.5bb

BB vs SB 4-bet 11.5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 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

5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 17.3bbYour cards?
5bb
11.5bb

Tap your two cards.

Big blind's range

850 of 1,326 combos get here
Fold 65.2%Call 30.5%All-in 99.84bb 4.3%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 100bb?

SB opens 2.5bb, BB 3-bets to 5bb, SB 4-bets to 11.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the big blind (BB) folds 65.2%, calls 30.5% and goes all-in 99.84bb 4.3%. Always call: QQ, 44-TT, AJs-AQs, A5s, K8s+, K5s, QTs+, Q8s, J9s+, T8s+, 98s, 76s, 64s+, 54s, AJo-AQo, KJo+. Always all-in 99.84bb: KK, AKo. Mixed: AA, JJ, AKs, A7s-ATs, A2s-A3s, K7s, K3s, Q9s, Q3s, J6s, J2s, 86s+, 75s, 63s, 52s-53s, 42s, ATo.

Always fold
Q2s, T6s, T3s, 92s-95s, 84s, 82s, A8o-A9o, A3o-A4o, K2o-K7o, Q5o-QTo, Q3o, J4o-J9o, T8o, T5o-T6o, 96o, 87o, 53o
Always call
QQ, 44-TT, AJs-AQs, A5s, K8s+, K5s, QTs+, Q8s, J9s+, T8s+, 98s, 76s, 64s+, 54s, AJo-AQo, KJo+
Always all-in 99.84bb
KK, AKo
Mixed
AA, JJ, AKs, A7s-ATs, A2s-A3s, K7s, K3s, Q9s, Q3s, J6s, J2s, 86s+, 75s, 63s, 52s-53s, 42s, ATo
Settings: 5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 23.9). 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.