PokerSolver
PokerSolver/6-max · 40bb · 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) · 40bb · CO opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb · Big blind to act

6-max · 40bb · 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

772 of 1,326 combos get here
Fold 85%Call 2.2%All-in 39.84bb 12.8%
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 40bb?

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, 40bb: the big blind (BB) folds 85%, calls 2.2% and goes all-in 39.84bb 12.8%. Always all-in 39.84bb: TT+, AKs, KQs, AQo+. Mixed: 66-99, ATs-AQs, A7s-A8s, A4s-A5s, K8s-KJs, K6s, QJs, AJo, KQo.

Always fold
55, A6s, A2s-A3s, K7s, K3s, Q6s-QTs, Q2s, J7s+, J3s, T7s+, T5s, 95s+, 93s, 84s-86s, 73s+, 62s+, 54s, 52s, 42s, A4o-ATo, A2o, K8o-KJo, Q8o+, Q5o, J7o+, T8o+, 98o, 85o+, 75o+, 65o
Always call
No hand plays this every time
Always all-in 39.84bb
TT+, AKs, KQs, AQo+
Mixed
66-99, ATs-AQs, A7s-A8s, A4s-A5s, K8s-KJs, K6s, QJs, AJo, KQo
Settings: 6-max · 40bb · 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, 40bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.93). 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.