PokerSolver
PokerSolver/4-max · 200bb · 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) · 200bb · 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 · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 222.68bbYour cards?
20.7bb
0.5bb
1bb
199.84bb

Tap your two cards.

Button's range

356 of 1,326 combos get here
Fold 88.6%Call 11.4%
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 200bb?

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, 200bb: the button (BTN) folds 88.6% and calls 11.4%. Always call: AA. Mixed: JJ-KK, 99, 66, ATs+, A6s, KQs, K6s, Q8s, 87s, AKo, ATo.

Always fold
77-88, 55, 33, A7s-A9s, A2s-A5s, KJs, K7s-K9s, K4s-K5s, Q9s+, Q6s, J8s-J9s, T7s+, 97s+, 86s, 65s, 54s, AJo-AQo, A8o, KQo, QJo, JTo
Always call
AA
Mixed
JJ-KK, 99, 66, ATs+, A6s, KQs, K6s, Q8s, 87s, AKo, ATo
Settings: 4-max · 200bb · 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, 200bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.