PokerSolver
PokerSolver/4-max · 80bb · 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) · 80bb · 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 · 80bb · 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

346 of 1,326 combos get here
Fold 34.3%Call 35.2%Raise 9.2bb 27.9%All-in 79.84bb 2.6%
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 80bb?

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, 80bb: the big blind (BB) folds 34.3%, calls 35.2%, raises 9.2bb 27.9% and goes all-in 79.84bb 2.6%. Always call: ATs, KTs. Always raise 9.2bb: AA, AQs. Mixed: JJ-KK, 44-99, AKs, AJs, A9s, A5s-A7s, A2s-A3s, KJs+, K6s-K7s, K3s, Q9s+, Q7s, J8s+, T8s+, T5s-T6s, 97s, 87s, 84s, 64s+, 54s, 43s, AKo, A9o-ATo, KTo, QTo, JTo.

Always fold
Q8s, 86s, A8o
Always call
ATs, KTs
Always raise 9.2bb
AA, AQs
Always all-in 79.84bb
No hand plays this every time
Mixed
JJ-KK, 44-99, AKs, AJs, A9s, A5s-A7s, A2s-A3s, KJs+, K6s-K7s, K3s, Q9s+, Q7s, J8s+, T8s+, T5s-T6s, 97s, 87s, 84s, 64s+, 54s, 43s, AKo, A9o-ATo, KTo, QTo, JTo
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.

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.