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

CO vs BTN 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 limps, BTN isolates to 3bb, CO 3-bets to 9bb, BTN 4-bets to 20.7bb · Cutoff to act

6-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differUTGHJCOBTNSBBB

Pot 32.16bbYour cards?

9bb

20.7bb

0.5bb

1bb

Tap your two cards.

Cutoff's range

188 of 1,326 combos get here

Fold 43.6%Call 47.8%All-in 149.84bb 8.6%

Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the cutoff (CO) when CO limps, BTN isolates to 3bb, CO 3-bets to 9bb, BTN 4-bets to 20.7bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

CO limps, BTN isolates to 3bb, CO 3-bets to 9bb, BTN 4-bets to 20.7bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the cutoff (CO) folds 43.6%, calls 47.8% and goes all-in 149.84bb 8.6%. Always call: JJ-QQ, 99, 77, 55, AQs, ATs, A8s, KTs-KJs, T9s, 76s. Always all-in 149.84bb: AA. Mixed: KK, AKs, A4s-A7s, A2s, QJs, Q9s, 98s.

Always fold: K9s, KJo+
Always call: JJ-QQ, 99, 77, 55, AQs, ATs, A8s, KTs-KJs, T9s, 76s
Always all-in 149.84bb: AA
Mixed: KK, AKs, A4s-A7s, A2s, QJs, Q9s, 98s

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.