PokerSolver
PokerSolver/4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs CO 4-bet 13.8bb

BB vs CO 4-bet 13.8bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (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

4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 20.94bbYour cards?
6bb
13.8bb
0.5bb

Tap your two cards.

Big blind's range

610 of 1,326 combos get here
Fold 79.2%Call 12%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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

CO opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the big blind (BB) folds 79.2%, calls 12% and goes all-in 79.84bb 8.8%. Always call: 77, AJs-AQs. Always all-in 79.84bb: KK, A3s, AKo. Mixed: AA, 88-QQ, 66, AKs, A4s-ATs, A2s, KTs-KJs, JTs, J8s, T9s, 87s, 75s+, 64s+, 53s+, 43s, AQo.

Always fold
KQs, K2s-K9s, Q8s+, Q5s-Q6s, Q2s-Q3s, J9s, J6s-J7s, J4s, J2s, T8s, T3s-T6s, 95s+, 85s-86s, 82s, 74s, 62s, ATo-AJo, A7o, A4o-A5o, KTo+, K7o, QJo, JTo, T9o, 98o, 87o, 65o, 54o
Always call
77, AJs-AQs
Always all-in 79.84bb
KK, A3s, AKo
Mixed
AA, 88-QQ, 66, AKs, A4s-ATs, A2s, KTs-KJs, JTs, J8s, T9s, 87s, 75s+, 64s+, 53s+, 43s, AQo
Settings: 4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 80bb stacks, 5% rake capped at 4.8bb; 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.