PokerSolver
PokerSolver/4-max · 250bb · 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) · 250bb · CO opens 3bb, BTN 3-bets to 9bb, CO 4-bets to 20.7bb · Button to act

4-max · 250bb · 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

334 of 1,326 combos get here
Fold 22.2%Call 66.1%Raise 45.54bb 11.6%All-in 249.84bb 0.1%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the button (BTN) when CO opens 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 250bb?

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, 250bb: the button (BTN) folds 22.2%, calls 66.1%, raises 45.54bb 11.6% and goes all-in 249.84bb 0.1%. Always call: JJ, 66-99, 22-44, AQs, A9s, A5s-A6s, A3s, K5s+, K3s, J9s+, T9s, 86s+, 76s, 64s+, 54s. Always raise 45.54bb: AA, AKs, A7s. Mixed: QQ-KK, TT, 55, ATs-AJs, A8s, A4s, A2s, K4s, Q9s+, J8s, T8s, 97s+, AQo+, KJo.

Always fold
ATo-AJo, KQo, KTo, QJo
Always call
JJ, 66-99, 22-44, AQs, A9s, A5s-A6s, A3s, K5s+, K3s, J9s+, T9s, 86s+, 76s, 64s+, 54s
Always raise 45.54bb
AA, AKs, A7s
Always all-in 249.84bb
No hand plays this every time
Mixed
QQ-KK, TT, 55, ATs-AJs, A8s, A4s, A2s, K4s, Q9s+, J8s, T8s, 97s+, AQo+, KJo
Settings: 4-max · 250bb · 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, 250bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.91). 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.