PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/CO vs SB 4-bet 20.7bb

CO vs SB 4-bet 20.7bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO limps, SB isolates to 3bb, CO 3-bets to 9bb, SB 4-bets to 20.7bb · Cutoff to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 31.34bbYour cards?
9bb
20.7bb
1bb

Tap your two cards.

Cutoff's range

238 of 1,326 combos get here
Fold 63.4%Call 33.5%All-in 99.84bb 3.2%
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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO limps, SB isolates to 3bb, CO 3-bets to 9bb, SB 4-bets to 20.7bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the cutoff (CO) folds 63.4%, calls 33.5% and goes all-in 99.84bb 3.2%. Always call: AA, JJ-QQ, 77, 55, AQs, AQo. Mixed: KK, AKs, A4s, K7s, AKo.

Always fold
A6s, K8s, K5s, Q8s, A9o-ATo, KJo, QJo
Always call
AA, JJ-QQ, 77, 55, AQs, AQo
Always all-in 99.84bb
No hand plays this every time
Mixed
KK, AKs, A4s, K7s, AKo
Settings: 4-max · 100bb · 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, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.