PokerSolver/Heads-up · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb/BB vs SB 4-bet 17.25bb

BB vs SB 4-bet 17.25bb

Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · SB opens 2.5bb, BB 3-bets to 7.5bb, SB 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

Tournament

Heads-up · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differSBBB

Pot 25.07bbYour cards?

7.5bb

17.25bb

Tap your two cards.

Big blind's range

810 of 1,326 combos get here

Fold 62%Call 29.8%All-in 99.84bb 8.2%

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

What is the GTO play for the big blind (BB) when SB opens 2.5bb, BB 3-bets to 7.5bb, SB 4-bets to 17.25bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb at 100bb?

SB opens 2.5bb, BB 3-bets to 7.5bb, SB 4-bets to 17.25bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 100bb: the big blind (BB) folds 62%, calls 29.8% and goes all-in 99.84bb 8.2%. Always call: AA, 99, 22-77, A9s-AJs, KTs+, K6s-K8s, Q9s+, J9s+, T8s+, 87s, 76s, 65s, 54s, AJo, KQo. Always all-in 99.84bb: JJ-KK, AKs, AKo. Mixed: TT, 88, AQs, A2s-A8s, K9s, K3s-K5s, Q8s, Q5s, Q3s, 97s+, 86s, 75s, 64s, 53s, 43s, AQo, ATo, KTo-KJo, QJo.

Always fold: Q6s-Q7s, Q4s, Q2s, J4s-J8s, J2s, T5s-T7s, T2s-T3s, 92s-96s, 82s-85s, 73s-74s, 62s-63s, 52s, 42s, A5o-A9o, K9o, K7o, Q8o-QTo, Q6o, J8o+, T7o+, 97o+, 86o+, 76o, 65o
Always call: AA, 99, 22-77, A9s-AJs, KTs+, K6s-K8s, Q9s+, J9s+, T8s+, 87s, 76s, 65s, 54s, AJo, KQo
Always all-in 99.84bb: JJ-KK, AKs, AKo
Mixed: TT, 88, AQs, A2s-A8s, K9s, K3s-K5s, Q8s, Q5s, Q3s, 97s+, 86s, 75s, 64s, 53s, 43s, AQo, ATo, KTo-KJo, QJo

Settings: Heads-up · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 100bb stacks, 5% rake capped at 2bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 8.9). 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.

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.