PokerSolver
PokerSolver/Heads-up · 100bb · 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) · 100bb · SB limps, BB isolates to 2bb, SB 3-bets to 4bb, BB goes all-in · Small blind / button to act

Heads-up · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game
Stacks (bb), if they differ
Pot 104.16bbYour cards?
4bb
99.84bb

Tap your two cards.

Small blind / button's range

700 of 1,326 combos get here
Fold 87.9%Call 12.1%
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 100bb?

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, 100bb: the small blind / button (SB) folds 87.9% and calls 12.1%. Always call: 88+, AQs, AKo. Mixed: 66-77, AJo-AQo, KQo.

Always fold
K2s-K4s, Q6s, J2s-J7s, T5s-T6s, T2s-T3s, 92s-93s, 83s-84s, 73s, 64s, 62s, 52s, 32s, ATo, A3o-A7o, K8o-KJo, K6o, Q9o+, Q7o, J8o+, T8o+, T2o, 87o, 76o, 65o, 54o
Always call
88+, AQs, AKo
Mixed
66-77, AJo-AQo, KQo
Settings: Heads-up · 100bb · 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, 100bb stacks, 5% rake capped at 2bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 8.9). 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.