PokerSolver
PokerSolver/6-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB 4-bet 11.5bb

BB vs SB 4-bet 11.5bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · SB opens 2.5bb, BB 3-bets to 5bb, SB 4-bets to 11.5bb · Big blind to act

6-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 17.46bbYour cards?
5bb
11.5bb

Tap your two cards.

Big blind's range

862 of 1,326 combos get here
Fold 65.8%Call 31.5%All-in 99.84bb 2.7%
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 2.5bb, BB 3-bets to 5bb, SB 4-bets to 11.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 100bb?

SB opens 2.5bb, BB 3-bets to 5bb, SB 4-bets to 11.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the big blind (BB) folds 65.8%, calls 31.5% and goes all-in 99.84bb 2.7%. Always call: AA, 55-TT, AJs-AQs, A9s, A6s, K8s+, K5s, Q9s+, Q6s, J9s+, T7s+, 97s, 86s, 76s, 65s, 54s, ATo-AQo, KQo. Mixed: JJ-KK, AKs, ATs, A7s, A4s-A5s, A2s, Q7s-Q8s, J3s, 98s, 96s, 93s, 85s, 43s, KJo.

Always fold
J6s, T2s, 94s, 92s, 82s, 73s-74s, A7o-A9o, A2o-A4o, K8o, K2o-K6o, Q9o, Q3o-Q6o, J7o-J9o, J3o-J5o, T5o-T6o, 95o-96o, 64o+, 43o
Always call
AA, 55-TT, AJs-AQs, A9s, A6s, K8s+, K5s, Q9s+, Q6s, J9s+, T7s+, 97s, 86s, 76s, 65s, 54s, ATo-AQo, KQo
Always all-in 99.84bb
No hand plays this every time
Mixed
JJ-KK, AKs, ATs, A7s, A4s-A5s, A2s, Q7s-Q8s, J3s, 98s, 96s, 93s, 85s, 43s, KJo
Settings: 6-max · 100bb · 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, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.89). 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.

Tree: Two HRC solves of this game in one, callers first: the callers solve (its raises grow by 1bb, or 1x, for each player who called before) has every one of the 1,323 spots here, so the base solve gives none of them.

This spot: from the callers solve (sizes: opens 2.0bb + 1.0bb, 2.5bb + 1.0bb, 3.0bb + 1.0bb; 3-bets 2.0x + 1.0x, 3.0x + 1.0x; 4-bets 2.3x, all-in; 5-bets all-in; HRC CI 24.58).