PokerSolver
PokerSolver/4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/SB vs BTN all-in

SB vs BTN all-in

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · BTN limps, SB isolates to 3bb, BTN 3-bets to 9bb, SB 4-bets to 20.7bb, BTN goes all-in · Small blind to act

4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 272.18bbYour cards?
20.7bb
1bb
249.84bb

Tap your two cards.

Small blind's range

320 of 1,326 combos get here
Fold 81.3%Call 18.7%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when BTN limps, SB isolates to 3bb, BTN 3-bets to 9bb, SB 4-bets to 20.7bb, BTN goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 250bb?

BTN limps, SB isolates to 3bb, BTN 3-bets to 9bb, SB 4-bets to 20.7bb, BTN goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 250bb: the small blind (SB) folds 81.3% and calls 18.7%. Always call: JJ+, AKs. Mixed: 66-TT, 44, AQs, A9s, A6s-A7s, A3s, K9s, K7s, QTs, T9s, 86s, AQo+.

Always fold
55, ATs-AJs, A8s, A4s-A5s, A2s, KTs+, K8s, K6s, QJs, Q5s, J9s+, T8s, 97s+, 75s+, 65s, 53s+, ATo-AJo, KQo
Always call
JJ+, AKs
Mixed
66-TT, 44, AQs, A9s, A6s-A7s, A3s, K9s, K7s, QTs, T9s, 86s, AQo+
Settings: 4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 250bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.91). 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.