PokerSolver
PokerSolver/5-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs CO 4-bet 13.8bb

BB vs CO 4-bet 13.8bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · CO opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb · Big blind to act

5-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 21.1bbYour cards?
6bb
13.8bb
0.5bb

Tap your two cards.

Big blind's range

442 of 1,326 combos get here
Fold 64.8%Call 26.5%Raise 30.36bb 6.1%All-in 249.84bb 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 opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 250bb?

CO opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 250bb: the big blind (BB) folds 64.8%, calls 26.5%, raises 30.36bb 6.1% and goes all-in 249.84bb 2.6%. Always call: TT, 88, 66, AJs, KQs. Mixed: JJ+, 99, 77, 33-55, AQs+, A3s-ATs, K9s-KJs, Q9s+, J9s+, T8s+, 97s, 75s+, 64s+, 54s, AKo.

Always fold
K5s-K8s, K3s, Q5s-Q8s, Q3s, J7s-J8s, T7s, 98s, 95s-96s, 85s+, 52s-53s, 43s, AJo-AQo, KTo-KJo, QJo, JTo, T8o+
Always call
TT, 88, 66, AJs, KQs
Always raise 30.36bb
No hand plays this every time
Always all-in 249.84bb
No hand plays this every time
Mixed
JJ+, 99, 77, 33-55, AQs+, A3s-ATs, K9s-KJs, Q9s+, J9s+, T8s+, 97s, 75s+, 64s+, 54s, AKo
Settings: 5-max · 250bb · 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, 250bb stacks, 5% rake capped at 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.

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.