PokerSolver
PokerSolver/5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/CO vs BTN 4-bet 17.25bb

CO vs BTN 4-bet 17.25bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · CO limps, BTN isolates to 2.5bb, CO 3-bets to 7.5bb, BTN 4-bets to 17.25bb · Cutoff to act

5-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 27.05bbYour cards?
7.5bb
17.25bb
0.5bb
1bb

Tap your two cards.

Cutoff's range

260 of 1,326 combos get here
Fold 44.1%Call 38.5%All-in 79.84bb 17.4%
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 2.5bb, CO 3-bets to 7.5bb, BTN 4-bets to 17.25bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

CO limps, BTN isolates to 2.5bb, CO 3-bets to 7.5bb, BTN 4-bets to 17.25bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the cutoff (CO) folds 44.1%, calls 38.5% and goes all-in 79.84bb 17.4%. Always call: 88, 55, AQs, KTs, JTs, AQo. Always all-in 79.84bb: QQ+, AKs. Mixed: TT-JJ, 66-77, A9s, A7s, A3s-A5s, K9s, QTs, J9s, T9s.

Always fold
J8s, T8s, KJo+, QJo, JTo
Always call
88, 55, AQs, KTs, JTs, AQo
Always all-in 79.84bb
QQ+, AKs
Mixed
TT-JJ, 66-77, A9s, A7s, A3s-A5s, K9s, QTs, J9s, T9s
Settings: 5-max · 80bb · 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, 80bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.