PokerSolver
PokerSolver/5-max · 80bb · 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) · 80bb · CO opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb · Big blind to act

5-max · 80bb · 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

662 of 1,326 combos get here
Fold 79.1%Call 12.1%All-in 79.84bb 8.8%
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 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 80bb?

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, 80bb: the big blind (BB) folds 79.1%, calls 12.1% and goes all-in 79.84bb 8.8%. Always call: 55-77, AJs, AQo. Always all-in 79.84bb: AKs. Mixed: 88+, 44, AQs, A2s-ATs, KQs, K9s, QTs+, JTs, T8s+, 97s, 86s, 53s, AKo.

Always fold
KTs-KJs, K4s-K8s, Q2s-Q9s, J9s, J4s-J7s, T4s-T7s, T2s, 98s, 95s-96s, 85s, 74s+, 63s-64s, 54s, 43s, 32s, A7o-AJo, A3o-A5o, KJo+, K8o, QJo, J9o+, T8o+, 97o+, 76o, 65o
Always call
55-77, AJs, AQo
Always all-in 79.84bb
AKs
Mixed
88+, 44, AQs, A2s-ATs, KQs, K9s, QTs+, JTs, T8s+, 97s, 86s, 53s, AKo
Settings: 5-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 24.95). 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.