PokerSolver
PokerSolver/6-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BTN vs CO 4-bet 20.7bb

BTN vs CO 4-bet 20.7bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 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

6-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 32.16bbYour cards?
9bb
0.5bb
1bb
20.7bb

Tap your two cards.

Button's range

350 of 1,326 combos get here
Fold 40.5%Call 50.9%All-in 149.84bb 8.7%
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 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

CO opens 3bb, BTN 3-bets to 9bb, CO 4-bets to 20.7bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the button (BTN) folds 40.5%, calls 50.9% and goes all-in 149.84bb 8.7%. Always call: AA, 33-TT, AQs+, A6s-A9s, KTs+, QJs, J9s+, T8s+, 98s, 87s, 76s, 65s, 54s, AQo. Always all-in 149.84bb: KK, AJs, A4s. Mixed: JJ-QQ, A5s, A3s, K9s, K6s, AKo, KJo.

Always fold
A2s, K7s-K8s, Q9s, ATo-AJo, KQo, KTo, QJo
Always call
AA, 33-TT, AQs+, A6s-A9s, KTs+, QJs, J9s+, T8s+, 98s, 87s, 76s, 65s, 54s, AQo
Always all-in 149.84bb
KK, AJs, A4s
Mixed
JJ-QQ, A5s, A3s, K9s, K6s, AKo, KJo
Settings: 6-max · 150bb · 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, 150bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.4). 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.