PokerSolver
PokerSolver/5-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs BTN 4-bet 17.25bb

BB vs BTN 4-bet 17.25bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 200bb · BTN opens 2.5bb, BB 3-bets to 7.5bb, BTN 4-bets to 17.25bb · Big blind to act

5-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 26.05bbYour cards?
7.5bb
17.25bb
0.5bb

Tap your two cards.

Big blind's range

618 of 1,326 combos get here
Fold 68.7%Call 21.9%Raise 37.95bb 6.5%All-in 199.84bb 2.9%
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 2.5bb, BB 3-bets to 7.5bb, BTN 4-bets to 17.25bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 200bb?

BTN opens 2.5bb, BB 3-bets to 7.5bb, BTN 4-bets to 17.25bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 200bb: the big blind (BB) folds 68.7%, calls 21.9%, raises 37.95bb 6.5% and goes all-in 199.84bb 2.9%. Always call: 22-77, A8s-AQs, KQs, QTs, 65s. Always raise 37.95bb: AA. Always all-in 199.84bb: AKo. Mixed: 88-KK, AKs, A2s-A7s, KTs-KJs, K6s-K8s, K3s-K4s, QJs, J9s+, T8s+, 97s+, 87s, 75s+, 64s, 53s+, AQo.

Always fold
K9s, K5s, K2s, Q5s-Q9s, J8s, J5s-J6s, J3s, T5s-T7s, 94s-96s, 85s-86s, 74s, 63s, 43s, ATo-AJo, A5o-A7o, KTo+, QTo+, JTo, T9o, 76o, 65o, 54o
Always call
22-77, A8s-AQs, KQs, QTs, 65s
Always raise 37.95bb
AA
Always all-in 199.84bb
AKo
Mixed
88-KK, AKs, A2s-A7s, KTs-KJs, K6s-K8s, K3s-K4s, QJs, J9s+, T8s+, 97s+, 87s, 75s+, 64s, 53s+, 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.

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.