PokerSolver
PokerSolver/4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/CO vs BTN 4-bet 17.25bb

CO vs BTN 4-bet 17.25bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (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

4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 26.89bbYour cards?
7.5bb
17.25bb
0.5bb
1bb

Tap your two cards.

Cutoff's range

266 of 1,326 combos get here
Fold 42.9%Call 37.9%All-in 79.84bb 19.2%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the cutoff (CO) when CO limps, BTN isolates to 2.5bb, CO 3-bets to 7.5bb, BTN 4-bets to 17.25bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

CO limps, BTN isolates to 2.5bb, CO 3-bets to 7.5bb, BTN 4-bets to 17.25bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the cutoff (CO) folds 42.9%, calls 37.9% and goes all-in 79.84bb 19.2%. Always call: 55-77, AQs, KTs, QTs, 76s, 54s, AQo. Always all-in 79.84bb: QQ-KK, AKs, AKo. Mixed: AA, 99-JJ, A2s-A8s, Q9s, J9s, T9s.

Always fold
K8s, J8s, ATo-AJo, KJo+, QJo
Always call
55-77, AQs, KTs, QTs, 76s, 54s, AQo
Always all-in 79.84bb
QQ-KK, AKs, AKo
Mixed
AA, 99-JJ, A2s-A8s, Q9s, J9s, T9s
Settings: 4-max · 80bb · 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, 80bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.98). 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.