PokerSolver
PokerSolver/Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb/SB vs BB 4-bet 17.25bb

SB vs BB 4-bet 17.25bb

Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · SB limps, BB isolates to 2.5bb, SB 3-bets to 7.5bb, BB 4-bets to 17.25bb · Small blind / button to act

Fits exactlyno game we have checked
Close1 games
  • CoinPoker cash with antes NL50rake before the flop in 3-bet pots there, none here
Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game
Stacks (bb), if they differ
Pot 25.07bbYour cards?
7.5bb
17.25bb

Tap your two cards.

Small blind / button's range

812 of 1,326 combos get here
Fold 48.1%Call 39.3%All-in 79.84bb 12.6%
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 2.5bb, SB 3-bets to 7.5bb, BB 4-bets to 17.25bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 80bb?

SB limps, BB isolates to 2.5bb, SB 3-bets to 7.5bb, BB 4-bets to 17.25bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 80bb: the small blind / button (SB) folds 48.1%, calls 39.3% and goes all-in 79.84bb 12.6%. Always call: AA, A4s, Q4s, JTs, 75s, AJo, QJo, JTo. Always all-in 79.84bb: JJ-QQ, 99, AKo. Mixed: KK, TT, 66-88, AQs+, A7s, A2s, Q7s, Q3s, J2s, T5s-T6s, 85s-86s, 74s, 63s, AQo, A9o-ATo, A2o-A7o, KJo+, K8o, K6o, K4o, Q8o, J9o, T7o-T8o, 97o+, 76o, 65o.

Always fold
T4s, Q7o, Q2o-Q4o, J8o, J3o-J4o, T5o-T6o, T2o, 86o+
Always call
AA, A4s, Q4s, JTs, 75s, AJo, QJo, JTo
Always all-in 79.84bb
JJ-QQ, 99, AKo
Mixed
KK, TT, 66-88, AQs+, A7s, A2s, Q7s, Q3s, J2s, T5s-T6s, 85s-86s, 74s, 63s, AQo, A9o-ATo, A2o-A7o, KJo+, K8o, K6o, K4o, Q8o, J9o, T7o-T8o, 97o+, 76o, 65o
Settings: Heads-up · 80bb · 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, 80bb stacks, 5% rake capped at 2bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 22.38). 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.

Rake sources for the games it fits: 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.