PokerSolver/4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BTN vs CO all-in

BTN vs CO all-in

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · CO limps, BTN isolates to 3bb, CO 3-bets to 9bb, BTN 4-bets to 20.7bb, CO goes all-in · Button to act

4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differCOBTNSBBB

Pot 272.68bbYour cards?

20.7bb

0.5bb

1bb

249.84bb

Tap your two cards.

Button's range

326 of 1,326 combos get here

Fold 88.4%Call 11.6%

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

What is the GTO play for the button (BTN) when CO limps, BTN isolates to 3bb, CO 3-bets to 9bb, BTN 4-bets to 20.7bb, CO goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 250bb?

CO limps, BTN isolates to 3bb, CO 3-bets to 9bb, BTN 4-bets to 20.7bb, CO goes all-in in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 250bb: the button (BTN) folds 88.4% and calls 11.6%. Always call: AA. Mixed: KK, 99-JJ, 55, AQs+, A6s, A2s, QJs, AKo.

Always fold: QQ, 66-88, 44, AJs, A7s-A9s, A3s-A5s, K6s-KJs, K3s-K4s, QTs, Q8s, J9s+, T8s+, 97s+, 86s+, 76s, 64s+, 54s, ATo, KJo+, QTo
Always call: AA
Mixed: KK, 99-JJ, 55, AQs+, A6s, A2s, QJs, AKo

Settings: 4-max · 250bb · 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, 250bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.91). 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.