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

BB vs BTN 4-bet 11.5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · BTN opens 2.5bb, BB 3-bets to 5bb, BTN 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
5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 17.8bbYour cards?
5bb
11.5bb
0.5bb

Tap your two cards.

Big blind's range

328 of 1,326 combos get here
Fold 44.2%Call 45.4%All-in 99.84bb 10.3%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when BTN opens 2.5bb, BB 3-bets to 5bb, BTN 4-bets to 11.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 100bb?

BTN opens 2.5bb, BB 3-bets to 5bb, BTN 4-bets to 11.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the big blind (BB) folds 44.2%, calls 45.4% and goes all-in 99.84bb 10.3%. Always call: 77-TT, 55, ATs, A8s, A5s, KTs+, QTs, JTs, 76s, 64s+, AQo. Always all-in 99.84bb: AKs, AKo. Mixed: KK+, JJ, AJs, A9s, A7s, A3s, K8s, Q8s, J9s, T8s, 97s, 86s, AJo, KQo.

Always fold
Q9s, T5s, A5o, QJo
Always call
77-TT, 55, ATs, A8s, A5s, KTs+, QTs, JTs, 76s, 64s+, AQo
Always all-in 99.84bb
AKs, AKo
Mixed
KK+, JJ, AJs, A9s, A7s, A3s, K8s, Q8s, J9s, T8s, 97s, 86s, AJo, KQo
Settings: 5-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 23.9). 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.