PokerSolver
PokerSolver/6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/CO vs BTN 3-bet 4bb

CO vs BTN 3-bet 4bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 20bb · CO opens 2bb, BTN 3-bets to 4bb · Cutoff to act

6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 8.46bbYour cards?
2bb
4bb
0.5bb
1bb

Tap your two cards.

Cutoff's range

448 of 1,326 combos get here
Fold 37.8%Call 30.9%All-in 19.84bb 31.3%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the cutoff (CO) when CO opens 2bb, BTN 3-bets to 4bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 20bb?

CO opens 2bb, BTN 3-bets to 4bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 20bb: the cutoff (CO) folds 37.8%, calls 30.9% and goes all-in 19.84bb 31.3%. Always call: 55-66, A9s, KJs, K5s-K6s, Q8s+, J9s+, T8s+, 97s+, 87s, 76s, A9o, KQo. Always all-in 19.84bb: 77-KK, AJs+, A7s, A3s-A4s, K9s, ATo+. Mixed: AA, ATs, A8s, A5s, KQs, KTs, K7s-K8s, Q6s-Q7s, J8s, T7s, A8o, A5o, QTo+.

Always fold
J7s, A6o-A7o, A4o, K9o-KTo, Q9o, J9o+, T9o
Always call
55-66, A9s, KJs, K5s-K6s, Q8s+, J9s+, T8s+, 97s+, 87s, 76s, A9o, KQo
Always all-in 19.84bb
77-KK, AJs+, A7s, A3s-A4s, K9s, ATo+
Mixed
AA, ATs, A8s, A5s, KQs, KTs, K7s-K8s, Q6s-Q7s, J8s, T7s, A8o, A5o, QTo+
Settings: 6-max · 20bb · 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, 20bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.9). 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.