PokerSolver
PokerSolver/4-max · 150bb · 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) · 150bb · CO opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb · Big blind to act

4-max · 150bb · 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

486 of 1,326 combos get here
Fold 67%Call 26%All-in 149.84bb 7%
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 150bb?

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, 150bb: the big blind (BB) folds 67%, calls 26% and goes all-in 149.84bb 7%. Always call: QQ, 33-TT, AQs+. Always all-in 149.84bb: AA. Mixed: KK, JJ, A2s-AJs, K9s+, QTs+, JTs, J8s, T9s, T7s, 75s+, 64s, 53s+, 43s, AQo+.

Always fold
K6s-K8s, K3s-K4s, Q4s-Q9s, J9s, J7s, J5s, J2s, T8s, T5s-T6s, 97s+, 92s, 86s+, 65s, 62s, 52s, KTo-KJo, K5o, QJo, T9o
Always call
QQ, 33-TT, AQs+
Always all-in 149.84bb
AA
Mixed
KK, JJ, A2s-AJs, K9s+, QTs+, JTs, J8s, T9s, T7s, 75s+, 64s, 53s+, 43s, AQo+
Settings: 4-max · 150bb · 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, 150bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.5). 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.