PokerSolver
PokerSolver/4-max · 100bb · 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) · 100bb · 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 · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 122.18bbYour cards?
20.7bb
1bb
99.84bb

Tap your two cards.

Small blind's range

344 of 1,326 combos get here
Fold 75.2%Call 24.8%
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 100bb?

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, 100bb: the small blind (SB) folds 75.2% and calls 24.8%. Always call: TT+, AKs, AKo. Mixed: 55-99, AJs-AQs, A5s, KQs, K9s, QJs, J8s-J9s, AQo, KQo.

Always fold
A6s-ATs, A3s-A4s, KTs-KJs, K7s-K8s, K3s-K4s, Q8s-QTs, JTs, T7s+, 98s, 86s+, 76s, 64s+, 54s, ATo-AJo, KTo-KJo, QTo, JTo
Always call
TT+, AKs, AKo
Mixed
55-99, AJs-AQs, A5s, KQs, K9s, QJs, J8s-J9s, AQo, KQo
Settings: 4-max · 100bb · 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, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.