PokerSolver
PokerSolver/5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs CO 3-bet 4bb

BB vs CO 3-bet 4bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · CO limps, BB isolates to 2bb, CO 3-bets to 4bb · Big blind to act

5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 7.3bbYour cards?
2bb
4bb
0.5bb

Tap your two cards.

Big blind's range

488 of 1,326 combos get here
Fold 37.2%Call 45.9%Raise 9.2bb 11.5%All-in 149.84bb 5.5%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

CO limps, BB isolates to 2bb, CO 3-bets to 4bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the big blind (BB) folds 37.2%, calls 45.9%, raises 9.2bb 11.5% and goes all-in 149.84bb 5.5%. Always call: 44-55, A7s, QTs, A5o. Mixed: 88+, 66, A8s+, A2s-A6s, K9s+, K6s-K7s, K3s, QJs, Q9s, Q4s, J9s+, T8s+, 96s-97s, 86s+, 75s, 64s+, 54s, 43s, A8o+, KJo+, QJo, JTo, T9o.

Always fold
96o-97o, 75o+, 54o
Always call
44-55, A7s, QTs, A5o
Always raise 9.2bb
No hand plays this every time
Always all-in 149.84bb
No hand plays this every time
Mixed
88+, 66, A8s+, A2s-A6s, K9s+, K6s-K7s, K3s, QJs, Q9s, Q4s, J9s+, T8s+, 96s-97s, 86s+, 75s, 64s+, 54s, 43s, A8o+, KJo+, QJo, JTo, T9o
Settings: 5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 150bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.89). 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.