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

SB vs BB all-in

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 2bb, SB 3-bets to 4bb, BB goes all-in · 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 84.16bbYour cards?
4bb
79.84bb

Tap your two cards.

Small blind / button's range

814 of 1,326 combos get here
Fold 84%Call 16%
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 2bb, SB 3-bets to 4bb, BB goes all-in in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 80bb?

SB limps, BB isolates to 2bb, SB 3-bets to 4bb, BB goes all-in in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 80bb: the small blind / button (SB) folds 84% and calls 16%. Always call: 77+, AQs+, AQo+. Mixed: 66, A8s, A4s, A8o-ATo, A5o, A3o, KJo.

Always fold
A2s, K6s, K2s-K3s, Q7s, Q4s-Q5s, Q2s, J3s-J6s, T6s-T7s, T4s, 93s-95s, 83s-85s, 75s, 72s-73s, 52s, 32s, AJo, A6o-A7o, A4o, A2o, KQo, K6o-KTo, K4o, K2o, QTo+, Q2o, JTo, J8o, J2o, T8o+, 94o-95o, 86o+, 63o-64o, 54o
Always call
77+, AQs+, AQo+
Mixed
66, A8s, A4s, A8o-ATo, A5o, A3o, KJo
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.