PokerSolver
PokerSolver/5-max · 80bb · 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) · 80bb · BTN opens 2.5bb, BB 3-bets to 7.5bb, BTN 4-bets to 17.25bb · 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 · 80bb · 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

700 of 1,326 combos get here
Fold 76.9%Call 10.6%All-in 79.84bb 12.5%
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 80bb?

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, 80bb: the big blind (BB) folds 76.9%, calls 10.6% and goes all-in 79.84bb 12.5%. Always call: 88-99, 55, ATs-AJs. Always all-in 79.84bb: JJ-KK, AKs, A4s-A5s, A2s, AKo. Mixed: AA, TT, 66-77, AQs, A6s-A7s, A3s, KTs+, QTs+, J9s+, T9s, 98s, 86s+, 76s, 65s, 54s, AQo.

Always fold
K2s-K9s, Q6s-Q9s, Q2s, J7s-J8s, J5s, J2s, T4s-T8s, 94s-97s, 85s, 73s-75s, 63s-64s, 52s-53s, 42s+, ATo-AJo, A3o-A7o, KTo+, K7o, Q9o+, J8o+, T7o+, 98o, 76o, 65o, 54o
Always call
88-99, 55, ATs-AJs
Always all-in 79.84bb
JJ-KK, AKs, A4s-A5s, A2s, AKo
Mixed
AA, TT, 66-77, AQs, A6s-A7s, A3s, KTs+, QTs+, J9s+, T9s, 98s, 86s+, 76s, 65s, 54s, AQo
Settings: 5-max · 80bb · 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, 80bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.