PokerSolver
PokerSolver/Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb/BB vs SB 4-bet 11.5bb

BB vs SB 4-bet 11.5bb

Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (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

Fits exactlyno game we have checked
Close1 games
  • CoinPoker cash with antes NL50rake before the flop in 3-bet pots there, none here
Tournament
Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game
Stacks (bb), if they differ
Pot 16.82bbYour cards?
5bb
11.5bb

Tap your two cards.

Big blind's range

702 of 1,326 combos get here
Fold 55.4%Call 36.9%All-in 79.84bb 7.8%
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 Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 80bb?

SB opens 2.5bb, BB 3-bets to 5bb, SB 4-bets to 11.5bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 80bb: the big blind (BB) folds 55.4%, calls 36.9% and goes all-in 79.84bb 7.8%. Always call: AA, 66-88, 22-44, A8s-AJs, A3s, KTs-KJs, K7s-K8s, Q9s-QTs, J9s+, T8s, 65s, ATo-AJo, KQo. Always all-in 79.84bb: KK, AKs, AKo. Mixed: 99-QQ, 55, AQs, A4s-A7s, A2s, KQs, K9s, K3s-K6s, QJs, Q8s, Q3s-Q4s, J7s, J5s, T9s, 97s+, 87s, 85s, 74s+, 63s-64s, AQo, A9o, KTo-KJo, QJo.

Always fold
K2s, Q2s, J6s, J4s, T7s, T5s, 93s-94s, 86s, 84s, 73s, 53s, A7o-A8o, A3o-A4o, K9o, K7o, Q9o, J8o-J9o, T9o, T7o, 97o+, 87o
Always call
AA, 66-88, 22-44, A8s-AJs, A3s, KTs-KJs, K7s-K8s, Q9s-QTs, J9s+, T8s, 65s, ATo-AJo, KQo
Always all-in 79.84bb
KK, AKs, AKo
Mixed
99-QQ, 55, AQs, A4s-A7s, A2s, KQs, K9s, K3s-K6s, QJs, Q8s, Q3s-Q4s, J7s, J5s, T9s, 97s+, 87s, 85s, 74s+, 63s-64s, AQo, A9o, KTo-KJo, QJo
Settings: Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 80bb stacks, 5% rake capped at 2bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 22.38). 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.

Rake sources for the games it fits: 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.