PokerSolver
PokerSolver/5-max · 100bb · 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) · 100bb · BTN opens 2.5bb, BB 3-bets to 7.5bb, BTN 4-bets to 17.25bb · Big blind to act

5-max · 100bb · 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

692 of 1,326 combos get here
Fold 75.8%Call 14.5%All-in 99.84bb 9.7%
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 100bb?

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, 100bb: the big blind (BB) folds 75.8%, calls 14.5% and goes all-in 99.84bb 9.7%. Always call: 88-99, 55, ATs-AQs, KTs+, QTs+, T9s, AQo. Always all-in 99.84bb: JJ-KK, AKs, A4s-A6s, AKo. Mixed: AA, TT, 66-77, A9s, A7s, A2s-A3s, J9s+, 98s, 87s, 76s, 64s+, 54s, KQo.

Always fold
K2s-K9s, Q6s-Q9s, Q4s, J4s-J8s, T4s-T8s, 94s-97s, 85s, 74s-75s, 63s, 52s-53s, 43s, ATo-AJo, A5o-A7o, A2o-A3o, KTo-KJo, K5o-K7o, QTo+, JTo, J8o, T7o+, 98o, 87o, 76o, 65o, 54o
Always call
88-99, 55, ATs-AQs, KTs+, QTs+, T9s, AQo
Always all-in 99.84bb
JJ-KK, AKs, A4s-A6s, AKo
Mixed
AA, TT, 66-77, A9s, A7s, A2s-A3s, J9s+, 98s, 87s, 76s, 64s+, 54s, KQo
Settings: 5-max · 100bb · 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, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 23.9). 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.