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

SB vs BB all-in

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · SB opens 3bb, BB 3-bets to 9bb, SB 4-bets to 20.7bb, BB 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 271.18bbYour cards?
20.7bb
249.84bb

Tap your two cards.

Small blind's range

330 of 1,326 combos get here
Fold 85.9%Call 14.1%
Tap a hand, or type one above, to see its exact mix.

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

SB opens 3bb, BB 3-bets to 9bb, SB 4-bets to 20.7bb, BB goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 250bb: the small blind (SB) folds 85.9% and calls 14.1%. Always call: KK+, AKs, AKo. Mixed: 77-QQ.

Always fold
44-66, A7s-AQs, A2s-A5s, K7s+, Q9s+, J8s+, T8s+, 97s+, 87s, 76s, 65s, 54s, ATo-AQo, KTo+, QJo, JTo
Always call
KK+, AKs, AKo
Mixed
77-QQ
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.