PokerSolver
PokerSolver/5-max · 80bb · 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) · 80bb · CO opens 2.5bb, BTN 3-bets to 7.5bb, CO 4-bets to 17.25bb · Button to act

Fits exactlyno game we have checked
Close1 games
  • CoinPoker cash with antes NL50rake before the flop in 3-bet pots there, none here
Tournament
5-max · 80bb · 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

412 of 1,326 combos get here
Fold 60%Call 25.1%All-in 79.84bb 14.9%
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 80bb?

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, 80bb: the button (BTN) folds 60%, calls 25.1% and goes all-in 79.84bb 14.9%. Always call: AA, 55-88, ATs-AQs, KTs+, QTs+, JTs, 98s, 76s, 65s, 54s. Always all-in 79.84bb: JJ-KK, AKs, A4s-A5s, AKo. Mixed: 99-TT, A8s, A2s-A3s, J9s, T9s, AQo.

Always fold
A6s-A7s, K3s-K9s, Q8s-Q9s, J8s, T8s, A9o-AJo, A7o, A5o, KTo+, QTo+, JTo
Always call
AA, 55-88, ATs-AQs, KTs+, QTs+, JTs, 98s, 76s, 65s, 54s
Always all-in 79.84bb
JJ-KK, AKs, A4s-A5s, AKo
Mixed
99-TT, A8s, A2s-A3s, J9s, T9s, AQo
Settings: 5-max · 80bb · 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, 80bb stacks, 5% rake capped at 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.

Rake sources for the games it fits: 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.