PokerSolver/5-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs BTN 4-bet 20.7bb

BB vs BTN 4-bet 20.7bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 200bb · BTN opens 3bb, BB 3-bets to 9bb, BTN 4-bets to 20.7bb · Big blind to act

Fits exactlyno game we have checked

Close1 games

CoinPoker cash with antes NL50rake before the flop in 3-bet pots there, none here

5-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differHJCOBTNSBBB

Pot 31bbYour cards?

9bb

20.7bb

0.5bb

Tap your two cards.

Big blind's range

598 of 1,326 combos get here

Fold 66.4%Call 23.9%Raise 45.54bb 7.1%All-in 199.84bb 2.6%

Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when BTN opens 3bb, BB 3-bets to 9bb, BTN 4-bets to 20.7bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 200bb?

BTN opens 3bb, BB 3-bets to 9bb, BTN 4-bets to 20.7bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 200bb: the big blind (BB) folds 66.4%, calls 23.9%, raises 45.54bb 7.1% and goes all-in 199.84bb 2.6%. Always call: JJ, 99, 22-77, A8s-AQs, KQs, QTs+, J9s+, T9s, 87s, 76s, 65s, 54s. Always raise 45.54bb: AA, K9s. Always all-in 199.84bb: AKo. Mixed: QQ-KK, TT, 88, AKs, A2s-A7s, KTs-KJs, K7s, T8s, 98s, 86s, AQo.

Always fold: K3s-K6s, Q4s-Q8s, J7s-J8s, J3s-J5s, T4s-T7s, 95s-97s, 85s, 74s-75s, 64s, 43s, ATo, A6o-A7o, A3o-A4o, K9o+, K7o, Q9o+, J9o+, T8o+
Always call: JJ, 99, 22-77, A8s-AQs, KQs, QTs+, J9s+, T9s, 87s, 76s, 65s, 54s
Always raise 45.54bb: AA, K9s
Always all-in 199.84bb: AKo
Mixed: QQ-KK, TT, 88, AKs, A2s-A7s, KTs-KJs, K7s, T8s, 98s, 86s, AQo

Settings: 5-max · 200bb · 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, 200bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.99). 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.

Rake sources for the games it fits: 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.