PokerSolver
PokerSolver/4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/SB vs BB 4-bet 20.7bb

SB vs BB 4-bet 20.7bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (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

4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 30.34bbYour cards?
9bb
20.7bb

Tap your two cards.

Small blind's range

684 of 1,326 combos get here
Fold 75.8%Call 6.9%All-in 79.84bb 17.3%
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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the small blind (SB) folds 75.8%, calls 6.9% and goes all-in 79.84bb 17.3%. Always call: ATs-AJs, A8s, QJs, T9s. Always all-in 79.84bb: TT-KK, 55, 33, AQs+, A4s-A5s, KJs, AQo+. Mixed: AA, 66-99, A6s-A7s, A2s-A3s, KQs, K9s-KTs, Q9s, J9s, 98s, 87s, 76s, 65s.

Always fold
K2s-K8s, Q7s-Q8s, Q2s, J5s-J8s, J3s, T6s-T8s, 95s-96s, 85s-86s, 74s-75s, 63s-64s, 53s+, ATo-AJo, A2o-A7o, K6o+, Q9o+, J8o+, T8o+, 98o
Always call
ATs-AJs, A8s, QJs, T9s
Always all-in 79.84bb
TT-KK, 55, 33, AQs+, A4s-A5s, KJs, AQo+
Mixed
AA, 66-99, A6s-A7s, A2s-A3s, KQs, K9s-KTs, Q9s, J9s, 98s, 87s, 76s, 65s
Settings: 4-max · 80bb · 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, 80bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.98). 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.