PokerSolver
PokerSolver/6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/CO vs SB all-in

CO vs SB all-in

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 40bb · CO opens 2.5bb, SB 3-bets to 5bb, CO 4-bets to 11.5bb, SB goes all-in · Cutoff to act

6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 53.3bbYour cards?
11.5bb
39.84bb
1bb

Tap your two cards.

Cutoff's range

410 of 1,326 combos get here
Fold 75.6%Call 24.4%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the cutoff (CO) when CO opens 2.5bb, SB 3-bets to 5bb, CO 4-bets to 11.5bb, SB goes all-in in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 40bb?

CO opens 2.5bb, SB 3-bets to 5bb, CO 4-bets to 11.5bb, SB goes all-in in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 40bb: the cutoff (CO) folds 75.6% and calls 24.4%. Always call: 77+, AQs+, ATs, AQo+. Mixed: A9s, A7s, KQs.

Always fold
A6s, A2s-A4s, KJs, K8s, K5s-K6s, K2s, QTs+, Q4s-Q8s, JTs, J7s, 98s, 65s, A3o-ATo, K9o+, Q9o+
Always call
77+, AQs+, ATs, AQo+
Mixed
A9s, A7s, KQs
Settings: 6-max · 40bb · 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, 40bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.93). 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.