PokerSolver
PokerSolver/5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BTN vs CO 4-bet 11.5bb

BTN vs CO 4-bet 11.5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · CO opens 2.5bb, BTN 3-bets to 5bb, CO 4-bets to 11.5bb · Button to act

5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 18.8bbYour cards?
5bb
0.5bb
1bb
11.5bb

Tap your two cards.

Button's range

310 of 1,326 combos get here
Fold 13.6%Call 83.3%All-in 149.84bb 3.1%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

CO opens 2.5bb, BTN 3-bets to 5bb, CO 4-bets to 11.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the button (BTN) folds 13.6%, calls 83.3% and goes all-in 149.84bb 3.1%. Always call: 33-KK, AQs+, A8s-ATs, A2s-A6s, K7s+, K4s-K5s, QTs+, J8s+, T8s+, 98s, 86s+, 76s, 65s, 54s, AQo. Mixed: AA, AJs, A7s, K6s, Q9s, AKo, AJo, KJo+.

Always fold
ATo, QJo
Always call
33-KK, AQs+, A8s-ATs, A2s-A6s, K7s+, K4s-K5s, QTs+, J8s+, T8s+, 98s, 86s+, 76s, 65s, 54s, AQo
Always all-in 149.84bb
No hand plays this every time
Mixed
AA, AJs, A7s, K6s, Q9s, AKo, AJo, KJo+
Settings: 5-max · 150bb · 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, 150bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.89). 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.