PokerSolver
PokerSolver/Heads-up · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb/BB vs SB 4-bet 11.5bb

BB vs SB 4-bet 11.5bb

Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (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

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 · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game
Stacks (bb), if they differ
Pot 16.82bbYour cards?
5bb
11.5bb

Tap your two cards.

Big blind's range

630 of 1,326 combos get here
Fold 48%Call 43.6%All-in 99.84bb 8.5%
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 Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 100bb?

SB opens 2.5bb, BB 3-bets to 5bb, SB 4-bets to 11.5bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 100bb: the big blind (BB) folds 48%, calls 43.6% and goes all-in 99.84bb 8.5%. Always call: AA, 33-77, A9s-ATs, A4s, K5s+, Q8s+, J9s+, T8s+, 97s+, 87s, 76s, 64s+, 53s+, 43s, ATo-AJo, KQo. Always all-in 99.84bb: KK, AKs, AKo. Mixed: 88-QQ, AQs, A5s-A8s, A2s-A3s, K4s, Q7s, J7s-J8s, T7s, 85s-86s, 75s, KTo-KJo, QTo+.

Always fold
Q3s, T4s-T6s, 94s-96s, A5o-A9o, K9o, K7o, Q7o-Q9o, JTo, J8o, T8o+, 98o, 86o, 76o
Always call
AA, 33-77, A9s-ATs, A4s, K5s+, Q8s+, J9s+, T8s+, 97s+, 87s, 76s, 64s+, 53s+, 43s, ATo-AJo, KQo
Always all-in 99.84bb
KK, AKs, AKo
Mixed
88-QQ, AQs, A5s-A8s, A2s-A3s, K4s, Q7s, J7s-J8s, T7s, 85s-86s, 75s, KTo-KJo, QTo+
Settings: Heads-up · 100bb · 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, 100bb stacks, 5% rake capped at 2bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 8.9). 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.