PokerSolver
PokerSolver/4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB 3-bet 7.5bb

BB vs SB 3-bet 7.5bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · CO opens 2.5bb, SB 3-bets to 7.5bb · 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 11.64bbYour cards?
1bb
2.5bb
7.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 93.1%Call 1.4%Raise 17.25bb 5.3%All-in 79.84bb 0.3%
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 2.5bb, SB 3-bets to 7.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

CO opens 2.5bb, SB 3-bets to 7.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the big blind (BB) folds 93.1%, calls 1.4%, raises 17.25bb 5.3% and goes all-in 79.84bb 0.3%. Always call: AQs. Always raise 17.25bb: QQ+, AKs, KJs, AQo. Mixed: 88-JJ, ATs-AJs, A6s-A7s, A3s-A4s, KQs, KTs, K7s, 65s, AKo, KQo.

Always fold
22-77, A8s-A9s, A5s, A2s, K8s-K9s, K2s-K6s, Q2s+, J2s+, T2s+, 92s+, 82s+, 72s+, 62s-64s, 52s+, 42s+, 32s, A2o-AJo, K2o-KJo, Q2o+, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
AQs
Always raise 17.25bb
QQ+, AKs, KJs, AQo
Always all-in 79.84bb
No hand plays this every time
Mixed
88-JJ, ATs-AJs, A6s-A7s, A3s-A4s, KQs, KTs, K7s, 65s, AKo, KQo
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.