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

SB vs BB 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 limps, BB isolates to 2.5bb, SB 3-bets to 5bb, BB 4-bets to 11.5bb · Small blind / button to act

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.

Small blind / button's range

840 of 1,326 combos get here
Fold 43.3%Call 51.7%All-in 79.84bb 5%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind / button (SB) when SB limps, BB isolates to 2.5bb, SB 3-bets to 5bb, BB 4-bets to 11.5bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 80bb?

SB limps, BB isolates to 2.5bb, SB 3-bets to 5bb, BB 4-bets to 11.5bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 80bb: the small blind / button (SB) folds 43.3%, calls 51.7% and goes all-in 79.84bb 5%. Always call: AA, 88, 66, 44, A9s, K5s-K7s, K3s, Q6s, Q4s, T6s, T3s, 87s, 74s, 63s, A9o-AJo, KTo+, QJo, JTo, 65o. Always all-in 79.84bb: AKo. Mixed: 99-KK, 77, AQs+, Q7s, Q2s-Q3s, J6s, J2s-J4s, 95s, 93s, 83s, 73s, 62s, 52s, AQo, A4o-A7o, A2o, K8o-K9o, K6o, K3o-K4o, Q8o-Q9o, T9o, 86o, 76o.

Always fold
T2s, 94s, 72s, A3o, Q2o-Q3o, J6o, J4o, J2o, T6o, T4o, 97o+, 64o
Always call
AA, 88, 66, 44, A9s, K5s-K7s, K3s, Q6s, Q4s, T6s, T3s, 87s, 74s, 63s, A9o-AJo, KTo+, QJo, JTo, 65o
Always all-in 79.84bb
AKo
Mixed
99-KK, 77, AQs+, Q7s, Q2s-Q3s, J6s, J2s-J4s, 95s, 93s, 83s, 73s, 62s, 52s, AQo, A4o-A7o, A2o, K8o-K9o, K6o, K3o-K4o, Q8o-Q9o, T9o, 86o, 76o
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.

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.