PokerSolver
PokerSolver/4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs BTN 4-bet 11.5bb

BB vs BTN 4-bet 11.5bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · 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
4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 17.64bbYour cards?
5bb
11.5bb
0.5bb

Tap your two cards.

Big blind's range

290 of 1,326 combos get here
Fold 36.9%Call 50.8%All-in 79.84bb 12.4%
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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

BTN opens 2.5bb, BB 3-bets to 5bb, BTN 4-bets to 11.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the big blind (BB) folds 36.9%, calls 50.8% and goes all-in 79.84bb 12.4%. Always call: 99, 55-77, AQs, ATs, A7s, K9s-KJs, Q9s+, T9s, 87s, AJo-AQo, KQo. Always all-in 79.84bb: AKs, AKo. Mixed: AA, QQ, TT, A5s, JTs, T8s, 86s, 65s.

Always fold
J9s, T7s, 96s, 75s, J9o+, 98o
Always call
99, 55-77, AQs, ATs, A7s, K9s-KJs, Q9s+, T9s, 87s, AJo-AQo, KQo
Always all-in 79.84bb
AKs, AKo
Mixed
AA, QQ, TT, A5s, JTs, T8s, 86s, 65s
Settings: 4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 80bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.98). 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.