PokerSolver
PokerSolver/4-max · 150bb · 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) · 150bb · CO opens 3bb, BTN 3-bets to 9bb, CO 4-bets to 20.7bb · Button to act

4-max · 150bb · 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

374 of 1,326 combos get here
Fold 35.7%Call 58.2%All-in 149.84bb 6.1%
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 150bb?

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, 150bb: the button (BTN) folds 35.7%, calls 58.2% and goes all-in 149.84bb 6.1%. Always call: AA, 22-JJ, AQs+, A6s-A9s, A3s, K9s+, QTs+, J9s+, T8s+, 97s+, 86s+, 76s, 65s, 54s. Mixed: QQ-KK, ATs-AJs, A4s-A5s, A2s, K8s, K6s, J8s, AJo+, KJo.

Always fold
K7s, K5s, Q7s-Q9s, ATo, KQo, KTo, QJo, JTo
Always call
AA, 22-JJ, AQs+, A6s-A9s, A3s, K9s+, QTs+, J9s+, T8s+, 97s+, 86s+, 76s, 65s, 54s
Always all-in 149.84bb
No hand plays this every time
Mixed
QQ-KK, ATs-AJs, A4s-A5s, A2s, K8s, K6s, J8s, AJo+, KJo
Settings: 4-max · 150bb · 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, 150bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.5). 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.