PokerSolver
PokerSolver/4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/CO vs BTN 4-bet 20.7bb

CO vs BTN 4-bet 20.7bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · CO limps, BTN isolates to 3bb, CO 3-bets to 9bb, BTN 4-bets to 20.7bb · Cutoff to act

4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 31.84bbYour cards?
9bb
20.7bb
0.5bb
1bb

Tap your two cards.

Cutoff's range

270 of 1,326 combos get here
Fold 42.5%Call 44.9%Raise 45.54bb 12.5%All-in 249.84bb <0.1%
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 3bb, CO 3-bets to 9bb, BTN 4-bets to 20.7bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 250bb?

CO limps, BTN isolates to 3bb, CO 3-bets to 9bb, BTN 4-bets to 20.7bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 250bb: the cutoff (CO) folds 42.5%, calls 44.9%, raises 45.54bb 12.5% and goes all-in 249.84bb 0%. Always call: QQ, 99-TT, 33-77, AJs, KJs, QJs, J9s+, T8s, 76s, 65s. Always raise 45.54bb: AA. Mixed: KK, JJ, 88, AQs+, A4s-ATs, KTs, Q9s, T9s, 97s.

Always fold
KQs, K8s-K9s, K6s, Q8s, T7s, AQo, ATo, KQo, QJo, JTo
Always call
QQ, 99-TT, 33-77, AJs, KJs, QJs, J9s+, T8s, 76s, 65s
Always raise 45.54bb
AA
Always all-in 249.84bb
No hand plays this every time
Mixed
KK, JJ, 88, AQs+, A4s-ATs, KTs, Q9s, T9s, 97s
Settings: 4-max · 250bb · 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, 250bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.91). 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.