PokerSolver
PokerSolver/5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs BB 4-bet 20.7bb

SB vs BB 4-bet 20.7bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb · Small blind to act

5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 30.5bbYour cards?
9bb
20.7bb

Tap your two cards.

Small blind's range

652 of 1,326 combos get here
Fold 77.8%Call 5.7%All-in 79.84bb 16.6%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the small blind (SB) folds 77.8%, calls 5.7% and goes all-in 79.84bb 16.6%. Always call: ATs-AJs, KTs, QJs. Always all-in 79.84bb: 66+, AQs+, A5s, KJs, AQo+. Mixed: A7s, A4s, KQs, K9s, 98s, 86s+, 76s, 65s.

Always fold
A6s, A2s, K3s-K8s, Q7s-Q9s, Q5s, Q2s, J7s-J9s, J3s, T4s+, 94s-96s, 85s, 75s, 64s, 53s+, 43s, ATo-AJo, A2o-A7o, K9o+, K5o-K7o, Q8o+, J8o+, T8o+, 98o, 87o, 76o
Always call
ATs-AJs, KTs, QJs
Always all-in 79.84bb
66+, AQs+, A5s, KJs, AQo+
Mixed
A7s, A4s, KQs, K9s, 98s, 86s+, 76s, 65s
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.