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

CO vs SB 4-bet 20.7bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · CO limps, SB isolates to 3bb, CO 3-bets to 9bb, SB 4-bets to 20.7bb · Cutoff to act

5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 31.5bbYour cards?
9bb
20.7bb
1bb

Tap your two cards.

Cutoff's range

292 of 1,326 combos get here
Fold 45.3%Call 46.2%All-in 149.84bb 8.5%
Tap a hand, or type one above, to see its exact mix.

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

CO limps, SB isolates to 3bb, CO 3-bets to 9bb, SB 4-bets to 20.7bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the cutoff (CO) folds 45.3%, calls 46.2% and goes all-in 149.84bb 8.5%. Always call: TT-QQ, 77-88, 44, 22, AQs, A2s, KTs-KJs, QJs, T8s+, 76s, AQo. Always all-in 149.84bb: AA, AKs. Mixed: KK, A6s, A3s, K9s, Q9s, T7s, 98s, 64s.

Always fold
Q8s, Q6s, A9o, A5o, KTo+
Always call
TT-QQ, 77-88, 44, 22, AQs, A2s, KTs-KJs, QJs, T8s+, 76s, AQo
Always all-in 149.84bb
AA, AKs
Mixed
KK, A6s, A3s, K9s, Q9s, T7s, 98s, 64s
Settings: 5-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 24.89). 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.