PokerSolver
PokerSolver/6-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs CO 4-bet 13.8bb

BB vs CO 4-bet 13.8bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · CO opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb · Big blind to act

6-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 21.26bbYour cards?
6bb
13.8bb
0.5bb

Tap your two cards.

Big blind's range

554 of 1,326 combos get here
Fold 74.3%Call 20.2%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 opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

CO opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the big blind (BB) folds 74.3%, calls 20.2% and goes all-in 149.84bb 5.5%. Always call: 99-QQ, 55-77, AQs+, A9s. Always all-in 149.84bb: AA. Mixed: KK, 88, 44, ATs-AJs, A2s-A8s, KTs+, QJs, JTs, T8s+, 97s+, 86s, 75s+, 64s, 54s, AKo.

Always fold
K2s-K9s, Q5s-QTs, Q2s, J8s-J9s, J5s-J6s, J2s, T5s-T7s, T2s, 84s-85s, 74s, 65s, 52s-53s, 43s, A5o, KQo, KTo, K8o, Q9o-QTo, JTo, T9o, 65o, 54o
Always call
99-QQ, 55-77, AQs+, A9s
Always all-in 149.84bb
AA
Mixed
KK, 88, 44, ATs-AJs, A2s-A8s, KTs+, QJs, JTs, T8s+, 97s+, 86s, 75s+, 64s, 54s, AKo
Settings: 6-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 24.4). 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.