PokerSolver/6-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BTN vs CO 4-bet 11.5bb

BTN vs CO 4-bet 11.5bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · CO opens 2.5bb, BTN 3-bets to 5bb, CO 4-bets to 11.5bb · Button to act

6-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differUTGHJCOBTNSBBB

Pot 18.96bbYour cards?

5bb

0.5bb

1bb

11.5bb

Tap your two cards.

Button's range

308 of 1,326 combos get here

Fold 35.3%Call 57.4%All-in 79.84bb 7.4%

Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the button (BTN) when CO opens 2.5bb, BTN 3-bets to 5bb, CO 4-bets to 11.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

CO opens 2.5bb, BTN 3-bets to 5bb, CO 4-bets to 11.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the button (BTN) folds 35.3%, calls 57.4% and goes all-in 79.84bb 7.4%. Always call: 33-KK, AJs-AQs, A4s, KTs+, QTs+, JTs, T9s. Mixed: AA, AKs, A5s-ATs, A2s-A3s, K9s, K6s, J9s, T8s, AJo-AQo.

Always fold: K7s-K8s, ATo, KTo+, QTo+, JTo
Always call: 33-KK, AJs-AQs, A4s, KTs+, QTs+, JTs, T9s
Always all-in 79.84bb: No hand plays this every time
Mixed: AA, AKs, A5s-ATs, A2s-A3s, K9s, K6s, J9s, T8s, AJo-AQo

Settings: 6-max · 80bb · 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, 80bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.92). 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.