PokerSolver
PokerSolver/6-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs CO 3-bet 4bb

BB vs CO 3-bet 4bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · UTG opens 2bb, CO 3-bets to 4bb · Big blind to act

6-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 8.46bbYour cards?
1bb
2bb
4bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 94.5%Call 1.4%Raise 9.2bb 2.8%All-in 79.84bb 1.4%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when UTG opens 2bb, CO 3-bets to 4bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

UTG opens 2bb, CO 3-bets to 4bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 80bb: the big blind (BB) folds 94.5%, calls 1.4%, raises 9.2bb 2.8% and goes all-in 79.84bb 1.4%. Always raise 9.2bb: AA. Mixed: 99-KK, 66, 22, AJs+, A8s-A9s, A3s-A5s, KQs, QJs, J7s, 85s, 64s, AQo+.

Always fold
77-88, 33-55, ATs, A6s-A7s, A2s, K2s-KJs, Q2s-QTs, J8s+, J2s-J6s, T2s+, 92s+, 86s+, 82s-84s, 72s+, 65s, 62s-63s, 52s+, 42s+, 32s, A2o-AJo, K2o+, Q2o+, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
No hand plays this every time
Always raise 9.2bb
AA
Always all-in 79.84bb
No hand plays this every time
Mixed
99-KK, 66, 22, AJs+, A8s-A9s, A3s-A5s, KQs, QJs, J7s, 85s, 64s, AQo+
Settings: 6-max · 80bb · 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, 80bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.92). 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.