PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BTN vs CO 4-bet 20.7bb

BTN vs CO 4-bet 20.7bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO opens 3bb, BTN 3-bets to 9bb, CO 4-bets to 20.7bb · 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
4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 31.84bbYour cards?
9bb
0.5bb
1bb
20.7bb

Tap your two cards.

Button's range

364 of 1,326 combos get here
Fold 51.8%Call 34.3%All-in 99.84bb 13.9%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the button (BTN) when CO opens 3bb, BTN 3-bets to 9bb, CO 4-bets to 20.7bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO opens 3bb, BTN 3-bets to 9bb, CO 4-bets to 20.7bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the button (BTN) folds 51.8%, calls 34.3% and goes all-in 99.84bb 13.9%. Always call: AA, 44-99, ATs-AQs, KTs-KJs, QTs+, JTs, T9s, 87s, 76s, 65s, AQo. Always all-in 99.84bb: QQ-KK, AKs, A4s, AKo. Mixed: TT-JJ, A7s-A9s, A5s, A3s, KQs, K9s, J9s, T8s, 54s.

Always fold
33, A6s, A2s, K3s-K8s, Q6s-Q9s, J8s, A9o-AJo, KTo+, QJo
Always call
AA, 44-99, ATs-AQs, KTs-KJs, QTs+, JTs, T9s, 87s, 76s, 65s, AQo
Always all-in 99.84bb
QQ-KK, AKs, A4s, AKo
Mixed
TT-JJ, A7s-A9s, A5s, A3s, KQs, K9s, J9s, T8s, 54s
Settings: 4-max · 100bb · 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, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.