PokerSolver
PokerSolver/4-max · 100bb · 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) · 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
4-max · 100bb · 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

362 of 1,326 combos get here
Fold 40.5%Call 49.2%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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

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, 100bb: the big blind (BB) folds 40.5%, calls 49.2% and goes all-in 99.84bb 10.3%. Always call: 88-TT, 55-66, 33, AJs-AQs, A7s, A4s, KTs+, QTs+, JTs, T8s+, 76s, 65s, 54s, AQo. Always all-in 99.84bb: KK, AKo. Mixed: AA, JJ-QQ, AKs, A8s-ATs, A5s-A6s, A2s-A3s, K8s-K9s, J9s, 98s, 86s+, 75s, 64s, AJo.

Always fold
K4s, Q8s-Q9s, T7s, 96s, A9o-ATo, KQo, KTo, QJo, T9o
Always call
88-TT, 55-66, 33, AJs-AQs, A7s, A4s, KTs+, QTs+, JTs, T8s+, 76s, 65s, 54s, AQo
Always all-in 99.84bb
KK, AKo
Mixed
AA, JJ-QQ, AKs, A8s-ATs, A5s-A6s, A2s-A3s, K8s-K9s, J9s, 98s, 86s+, 75s, 64s, AJo
Settings: 4-max · 100bb · 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, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.