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

BB vs SB 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 opens 3bb, BB 3-bets to 9bb, SB 4-bets to 20.7bb · Big blind 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

Tournament

Heads-up · 60bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differSBBB

Pot 30.02bbYour cards?

9bb

20.7bb

Tap your two cards.

Big blind's range

850 of 1,326 combos get here

Fold 66.5%Call 18.8%All-in 59.84bb 14.6%

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 3bb, BB 3-bets to 9bb, SB 4-bets to 20.7bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 60bb?

SB opens 3bb, BB 3-bets to 9bb, SB 4-bets to 20.7bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 60bb: the big blind (BB) folds 66.5%, calls 18.8% and goes all-in 59.84bb 14.6%. Always call: A8s-A9s, K7s, JTs, T8s+, 64s. Always all-in 59.84bb: 99-KK, 55-77, AQs+, KQs, AQo+. Mixed: AA, 88, ATs-AJs, A4s-A5s, A2s, KTs-KJs, K2s-K3s, QTs+, Q8s, Q5s, J7s, J5s, T7s, 95s, 93s, 84s+, 74s-75s, 65s, 53s+, 43s, ATo-AJo, KTo+, QJo, JTo.

Always fold: K5s, Q7s, Q2s-Q3s, J6s, J2s-J3s, T6s, T2s-T3s, 96s, 94s, 83s, 73s, 63s, 52s, A2o-A9o, K8o-K9o, K5o-K6o, Q6o-QTo, J7o-J9o, T7o+, 97o+, 86o+, 76o, 65o
Always call: A8s-A9s, K7s, JTs, T8s+, 64s
Always all-in 59.84bb: 99-KK, 55-77, AQs+, KQs, AQo+
Mixed: AA, 88, ATs-AJs, A4s-A5s, A2s, KTs-KJs, K2s-K3s, QTs+, Q8s, Q5s, J7s, J5s, T7s, 95s, 93s, 84s+, 74s-75s, 65s, 53s+, 43s, ATo-AJo, KTo+, QJo, JTo

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.

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.