PokerSolver
PokerSolver/4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs CO 3-bet 4bb

BB vs CO 3-bet 4bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · CO limps, BB isolates to 2bb, CO 3-bets to 4bb · Big blind 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 · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 7.14bbYour cards?
2bb
4bb
0.5bb

Tap your two cards.

Big blind's range

482 of 1,326 combos get here
Fold 32.8%Call 54%Raise 9.2bb 10.8%All-in 249.84bb 2.4%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when CO limps, BB isolates to 2bb, CO 3-bets to 4bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 250bb?

CO limps, BB isolates to 2bb, CO 3-bets to 4bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 250bb: the big blind (BB) folds 32.8%, calls 54%, raises 9.2bb 10.8% and goes all-in 249.84bb 2.4%. Always call: 99-JJ, 66, 33, A9s, A5s-A6s, 97s, AJo-AQo, KJo+. Mixed: QQ+, 77-88, 44-55, ATs+, A8s, A4s, A2s, K8s+, K5s-K6s, K3s, QJs, Q8s-Q9s, J9s+, J7s, J4s, T7s-T8s, 87s, 85s, 65s, 53s+, AKo, A9o-ATo, Q9o+, JTo, T8o, 97o, 86o, 76o, 54o.

Always fold
J5s, 84s, 42s
Always call
99-JJ, 66, 33, A9s, A5s-A6s, 97s, AJo-AQo, KJo+
Always raise 9.2bb
No hand plays this every time
Always all-in 249.84bb
No hand plays this every time
Mixed
QQ+, 77-88, 44-55, ATs+, A8s, A4s, A2s, K8s+, K5s-K6s, K3s, QJs, Q8s-Q9s, J9s+, J7s, J4s, T7s-T8s, 87s, 85s, 65s, 53s+, AKo, A9o-ATo, Q9o+, JTo, T8o, 97o, 86o, 76o, 54o
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.

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.