PokerSolver
PokerSolver/4-max · 150bb · 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) · 150bb · CO limps, BTN isolates to 3bb, CO 3-bets to 9bb, BTN 4-bets to 20.7bb · Cutoff to act

Fits exactlyno game we have checked
Close1 games
  • CoinPoker cash with antes NL50rake before the flop in 3-bet pots there, none here
4-max · 150bb · 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

284 of 1,326 combos get here
Fold 42.6%Call 45.4%All-in 149.84bb 12%
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 150bb?

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, 150bb: the cutoff (CO) folds 42.6%, calls 45.4% and goes all-in 149.84bb 12%. Always call: JJ-QQ, 44-77, AQs, A8s-A9s, KTs, QJs, 76s, 65s. Always all-in 149.84bb: AA, AKs. Mixed: KK, 99-TT, A7s, A3s-A5s, K9s, K7s, 98s, 87s, AQo.

Always fold
K4s, Q9s, J8s, ATo, KJo+, QJo
Always call
JJ-QQ, 44-77, AQs, A8s-A9s, KTs, QJs, 76s, 65s
Always all-in 149.84bb
AA, AKs
Mixed
KK, 99-TT, A7s, A3s-A5s, K9s, K7s, 98s, 87s, AQo
Settings: 4-max · 150bb · 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, 150bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.5). 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.

Rake sources for the games it fits: 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.