PokerSolver
PokerSolver/4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs BTN 3-bet 9bb

BB vs BTN 3-bet 9bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · CO opens 3bb, BTN 3-bets to 9bb · Big blind to act

4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 14.14bbYour cards?
1bb
3bb
9bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 94.6%Call 0.7%Raise 20.7bb 3.3%All-in 249.84bb 1.4%
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 3bb, BTN 3-bets to 9bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 250bb?

CO opens 3bb, BTN 3-bets to 9bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 250bb: the big blind (BB) folds 94.6%, calls 0.7%, raises 20.7bb 3.3% and goes all-in 249.84bb 1.4%. Always raise 20.7bb: AA, QQ, AQs. Always all-in 249.84bb: AKo. Mixed: KK, 88-JJ, 66, AKs, ATs-AJs, A5s, KTs+.

Always fold
77, 22-55, A6s-A9s, A2s-A4s, K2s-K9s, Q2s+, J2s+, T2s+, 92s+, 82s+, 72s+, 62s+, 52s+, 42s+, 32s, A2o-AQo, K2o+, Q2o+, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
No hand plays this every time
Always raise 20.7bb
AA, QQ, AQs
Always all-in 249.84bb
AKo
Mixed
KK, 88-JJ, 66, AKs, ATs-AJs, A5s, KTs+
Settings: 4-max · 250bb · 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, 250bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.91). 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.