PokerSolver
PokerSolver/Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb/BB vs SB 4-bet 9.2bb

BB vs SB 4-bet 9.2bb

Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · SB opens 2bb, BB 3-bets to 4bb, SB 4-bets to 9.2bb · Big blind to act

Heads-up · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game
Stacks (bb), if they differ
Pot 13.52bbYour cards?
4bb
9.2bb

Tap your two cards.

Big blind's range

870 of 1,326 combos get here
Fold 64.6%Call 26.1%All-in 79.84bb 9.3%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when SB opens 2bb, BB 3-bets to 4bb, SB 4-bets to 9.2bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 80bb?

SB opens 2bb, BB 3-bets to 4bb, SB 4-bets to 9.2bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 80bb: the big blind (BB) folds 64.6%, calls 26.1% and goes all-in 79.84bb 9.3%. Always call: AA, 55-77, ATs-AJs, A4s, KTs+, QJs, KQo. Always all-in 79.84bb: KK, AKs, AKo. Mixed: 88-QQ, 44, AQs, A5s-A9s, A2s-A3s, K5s-K8s, Q5s-QTs, J8s+, J4s, J2s, T6s+, 98s, 86s+, 75s+, 53s+, 43s, AJo-AQo, A8o-A9o, KTo-KJo, QTo+, JTo, T9o.

Always fold
Q2s-Q3s, J7s, J5s, J3s, T4s-T5s, 96s, 92s-93s, 82s-85s, 72s-74s, 64s, 52s, 32s, A7o, A5o, K9o, K7o, J9o, T8o, 96o+, 87o, 85o, 75o+, 65o, 54o
Always call
AA, 55-77, ATs-AJs, A4s, KTs+, QJs, KQo
Always all-in 79.84bb
KK, AKs, AKo
Mixed
88-QQ, 44, AQs, A5s-A9s, A2s-A3s, K5s-K8s, Q5s-QTs, J8s+, J4s, J2s, T6s+, 98s, 86s+, 75s+, 53s+, 43s, AJo-AQo, A8o-A9o, KTo-KJo, QTo+, JTo, T9o
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.

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.