PokerSolver
PokerSolver/6-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB 4-bet 20.7bb

BB vs SB 4-bet 20.7bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · 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
6-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 30.66bbYour cards?
9bb
20.7bb

Tap your two cards.

Big blind's range

548 of 1,326 combos get here
Fold 55.5%Call 37.1%All-in 149.84bb 7.4%
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 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

SB opens 3bb, BB 3-bets to 9bb, SB 4-bets to 20.7bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the big blind (BB) folds 55.5%, calls 37.1% and goes all-in 149.84bb 7.4%. Always call: 88-JJ, 22-66, AJs-AQs, A9s, A2s, K8s+, K2s-K5s, QTs+, J8s+, T8s+, 97s+, 87s, 76s, 65s, 54s, AQo, KQo. Always all-in 149.84bb: KK, A4s-A5s, AKo. Mixed: AA, QQ, AKs, A6s-A7s, A3s.

Always fold
93s, 83s, 32s, A2o-A3o, K2o-K5o, Q4o-Q7o, J4o-J8o, T6o-T7o, 96o-97o, 86o
Always call
88-JJ, 22-66, AJs-AQs, A9s, A2s, K8s+, K2s-K5s, QTs+, J8s+, T8s+, 97s+, 87s, 76s, 65s, 54s, AQo, KQo
Always all-in 149.84bb
KK, A4s-A5s, AKo
Mixed
AA, QQ, AKs, A6s-A7s, A3s
Settings: 6-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 150bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.4). 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.