PokerSolver
PokerSolver/5-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BTN vs CO 4-bet 17.25bb

BTN vs CO 4-bet 17.25bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 200bb · CO opens 2.5bb, BTN 3-bets to 7.5bb, CO 4-bets to 17.25bb · Button to act

5-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 27.05bbYour cards?
7.5bb
0.5bb
1bb
17.25bb

Tap your two cards.

Button's range

378 of 1,326 combos get here
Fold 34.3%Call 54.4%Raise 37.95bb 11.1%All-in 199.84bb 0.2%
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 7.5bb, CO 4-bets to 17.25bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 200bb?

CO opens 2.5bb, BTN 3-bets to 7.5bb, CO 4-bets to 17.25bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 200bb: the button (BTN) folds 34.3%, calls 54.4%, raises 37.95bb 11.1% and goes all-in 199.84bb 0.2%. Always call: 22-JJ, AJs, A3s, K9s+, K3s, QJs, J8s+, T9s, 97s, 87s, 76s, 65s, 54s. Always raise 37.95bb: KK+. Mixed: QQ, AQs+, A4s-ATs, A2s, K4s-K8s, Q9s-QTs, T7s-T8s, 98s, ATo+, KJo+.

Always fold
Q8s, KTo, QTo+, JTo
Always call
22-JJ, AJs, A3s, K9s+, K3s, QJs, J8s+, T9s, 97s, 87s, 76s, 65s, 54s
Always raise 37.95bb
KK+
Always all-in 199.84bb
No hand plays this every time
Mixed
QQ, AQs+, A4s-ATs, A2s, K4s-K8s, Q9s-QTs, T7s-T8s, 98s, ATo+, KJo+
Settings: 5-max · 200bb · 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, 200bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.99). 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.