PokerSolver
PokerSolver/Heads-up · 60bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb/SB vs BB 4-bet 20.7bb

SB vs BB 4-bet 20.7bb

Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (blinds 0.5/1bb, ante 0.16bb) · 60bb · SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb · Small blind / button to act

Heads-up · 60bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game
Stacks (bb), if they differ
Pot 30.02bbYour cards?
9bb
20.7bb

Tap your two cards.

Small blind / button's range

554 of 1,326 combos get here
Fold 62%Call 16.6%All-in 59.84bb 21.4%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind / button (SB) when SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 60bb?

SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 60bb: the small blind / button (SB) folds 62%, calls 16.6% and goes all-in 59.84bb 21.4%. Always call: Q7s, Q4s, KJo+. Always all-in 59.84bb: 77-KK, 44, AQs+, AQo+. Mixed: AA, 55-66, ATo-AJo, A7o, A3o-A4o, K7o-KTo, QJo, Q9o, 76o.

Always fold
T2s, 92s, A6o, A2o, K6o, K4o, K2o, Q8o, Q6o, Q4o, Q2o, J7o-J8o, T7o-T8o, 97o+
Always call
Q7s, Q4s, KJo+
Always all-in 59.84bb
77-KK, 44, AQs+, AQo+
Mixed
AA, 55-66, ATo-AJo, A7o, A3o-A4o, K7o-KTo, QJo, Q9o, 76o
Settings: Heads-up · 60bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 60bb stacks, 5% rake capped at 2bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 8.73). 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.