PokerSolver
PokerSolver/4-max · 200bb · 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) · 200bb · 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 · 200bb · 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

378 of 1,326 combos get here
Fold 29%Call 56.3%Raise 9.2bb 12.8%All-in 199.84bb 1.8%
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 200bb?

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, 200bb: the big blind (BB) folds 29%, calls 56.3%, raises 9.2bb 12.8% and goes all-in 199.84bb 1.8%. Always call: QQ, TT, 77, 55, 22-33, A8s, A3s, KTs, QJs, J7s. Mixed: KK+, 88-99, 66, 44, A9s+, A7s, A4s-A5s, A2s, KJs+, K9s, K5s-K7s, Q9s-QTs, Q5s, Q3s, JTs, J6s, J3s, T7s+, 98s, 96s, 87s, 76s, 42s, AKo, QTo+, JTo, T8o.

Always fold
Q8s, 53s, 86o, 43o
Always call
QQ, TT, 77, 55, 22-33, A8s, A3s, KTs, QJs, J7s
Always raise 9.2bb
No hand plays this every time
Always all-in 199.84bb
No hand plays this every time
Mixed
KK+, 88-99, 66, 44, A9s+, A7s, A4s-A5s, A2s, KJs+, K9s, K5s-K7s, Q9s-QTs, Q5s, Q3s, JTs, J6s, J3s, T7s+, 98s, 96s, 87s, 76s, 42s, AKo, QTo+, JTo, T8o
Settings: 4-max · 200bb · 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, 200bb stacks, 5% rake capped at 4.8bb; 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.

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.