PokerSolver
PokerSolver/5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs BTN all-in

SB vs BTN all-in

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · 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

5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 102.34bbYour cards?
20.7bb
1bb
79.84bb

Tap your two cards.

Small blind's range

324 of 1,326 combos get here
Fold 65.5%Call 34.5%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

BTN limps, SB isolates to 3bb, BTN 3-bets to 9bb, SB 4-bets to 20.7bb, BTN goes all-in in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the small blind (SB) folds 65.5% and calls 34.5%. Always call: TT+, 88, AQs+, KJs, AQo+. Mixed: 99, 66-77, AJs, A7s-A9s, A5s, KQs, K5s-KTs, QTs, J8s, T9s, T7s, 97s, 54s, ATo-AJo, QTo, JTo.

Always fold
55, ATs, A6s, A2s-A4s, QJs, Q8s-Q9s, J9s+, T8s, 98s, 87s, 76s, 53s, KJo+, QJo
Always call
TT+, 88, AQs+, KJs, AQo+
Mixed
99, 66-77, AJs, A7s-A9s, A5s, KQs, K5s-KTs, QTs, J8s, T9s, T7s, 97s, 54s, ATo-AJo, QTo, JTo
Settings: 5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 80bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.