PokerSolver
PokerSolver/5-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

5-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

5-max · 150bb · 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

548 of 1,326 combos get here
Fold 73.9%Call 21.1%All-in 149.84bb 4.9%
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 150bb?

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, 150bb: the big blind (BB) folds 73.9%, calls 21.1% and goes all-in 149.84bb 4.9%. Always call: TT-QQ, 55-88, AQs. Always all-in 149.84bb: AA. Mixed: KK, 99, 33-44, AKs, A2s-AJs, KTs+, K7s, J8s+, T8s+, 97s+, 86s, 65s, 53s, AKo.

Always fold
K9s, K4s-K6s, Q3s+, J5s-J7s, J2s, T6s-T7s, T4s, 95s, 84s-85s, 74s+, 63s, 54s, 52s, 42s+, AJo-AQo, KTo+, Q9o+, J9o+, 65o
Always call
TT-QQ, 55-88, AQs
Always all-in 149.84bb
AA
Mixed
KK, 99, 33-44, AKs, A2s-AJs, KTs+, K7s, J8s+, T8s+, 97s+, 86s, 65s, 53s, AKo
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.