PokerSolver
PokerSolver/5-max · 100bb · 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) · 100bb · CO opens 2bb, BB 3-bets to 6bb, CO 4-bets to 13.8bb · Big blind to act

5-max · 100bb · 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

620 of 1,326 combos get here
Fold 75.1%Call 17.1%All-in 99.84bb 7.8%
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 100bb?

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, 100bb: the big blind (BB) folds 75.1%, calls 17.1% and goes all-in 99.84bb 7.8%. Always call: 99, 66, AJs-AQs. Always all-in 99.84bb: AA, A8s. Mixed: TT-KK, 77-88, 55, AKs, A9s-ATs, A2s-A7s, KTs+, K6s, Q9s-QTs, J9s+, T9s, 96s+, 86s, 75s+, 65s, 63s, 54s, 43s, AQo+.

Always fold
K7s-K9s, K3s-K5s, QJs, Q4s-Q6s, Q2s, J8s, J4s-J6s, T5s-T8s, T3s, 94s-95s, 87s, 85s, 74s, 64s, 53s, 42s, AJo, A7o, A5o, KTo+, K5o, QJo, JTo, T8o+, 98o, 54o
Always call
99, 66, AJs-AQs
Always all-in 99.84bb
AA, A8s
Mixed
TT-KK, 77-88, 55, AKs, A9s-ATs, A2s-A7s, KTs+, K6s, Q9s-QTs, J9s+, T9s, 96s+, 86s, 75s+, 65s, 63s, 54s, 43s, AQo+
Settings: 5-max · 100bb · 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, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 23.9). 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.