PokerSolver
PokerSolver/5-max · 150bb · 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) · 150bb · BTN opens 2.5bb, BB 3-bets to 7.5bb, BTN 4-bets to 17.25bb · Big blind to act

5-max · 150bb · 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

630 of 1,326 combos get here
Fold 67.4%Call 25.9%All-in 149.84bb 6.7%
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 150bb?

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, 150bb: the big blind (BB) folds 67.4%, calls 25.9% and goes all-in 149.84bb 6.7%. Always call: 22-QQ, A8s-AQs, KTs+, QTs+, JTs, T9s, 87s, 76s, 65s, 54s, AQo. Always all-in 149.84bb: KK, A3s, AKo. Mixed: AA, AKs, A4s-A7s, A2s, K8s, J9s, T8s, 98s, 86s, 75s, 64s.

Always fold
K3s-K7s, Q4s-Q9s, Q2s, J4s-J8s, T4s-T7s, 95s-97s, 85s, 63s, 53s, 42s+, ATo-AJo, A3o-A6o, KTo+, K6o-K7o, Q7o+, J9o+, T8o+, 98o
Always call
22-QQ, A8s-AQs, KTs+, QTs+, JTs, T9s, 87s, 76s, 65s, 54s, AQo
Always all-in 149.84bb
KK, A3s, AKo
Mixed
AA, AKs, A4s-A7s, A2s, K8s, J9s, T8s, 98s, 86s, 75s, 64s
Settings: 5-max · 150bb · 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, 150bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.89). 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.