PokerSolver/6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BTN vs CO 4-bet 13.8bb

BTN vs CO 4-bet 13.8bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 40bb · CO opens 3bb, BTN 3-bets to 6bb, CO 4-bets to 13.8bb · Button to act

6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differUTGHJCOBTNSBBB

Pot 22.26bbYour cards?

6bb

0.5bb

1bb

13.8bb

Tap your two cards.

Button's range

254 of 1,326 combos get here

Fold 47.9%Call 13.5%All-in 39.84bb 38.6%

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

What is the GTO play for the button (BTN) when CO opens 3bb, BTN 3-bets to 6bb, CO 4-bets to 13.8bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 40bb?

CO opens 3bb, BTN 3-bets to 6bb, CO 4-bets to 13.8bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 40bb: the button (BTN) folds 47.9%, calls 13.5% and goes all-in 39.84bb 38.6%. Always call: AJs. Always all-in 39.84bb: TT-KK, 44, AQs+, KJs, AQo+. Mixed: AA, 88-99, 66, A7s-A8s, A3s-A4s, K9s, Q9s, T9s, 98s, AJo, KQo.

Always fold: A5s-A6s, A2s, K8s, K5s, Q8s, T8s, ATo, KTo-KJo, QJo
Always call: AJs
Always all-in 39.84bb: TT-KK, 44, AQs+, KJs, AQo+
Mixed: AA, 88-99, 66, A7s-A8s, A3s-A4s, K9s, Q9s, T9s, 98s, AJo, KQo

Settings: 6-max · 40bb · 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, 40bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.93). 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.