PokerSolver
PokerSolver/Heads-up · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb/BB vs SB 3-bet 4bb

BB vs SB 3-bet 4bb

Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · SB limps, BB isolates to 2bb, SB 3-bets to 4bb · Big blind to act

Heads-up · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bbChange game
Stacks (bb), if they differ
Pot 6.32bbYour cards?
2bb
4bb

Tap your two cards.

Big blind's range

1,002 of 1,326 combos get here
Fold 31.9%Call 50%Raise 9.2bb 14.6%All-in 99.84bb 3.5%
Tap a hand, or type one above, to see its exact mix.

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

SB limps, BB isolates to 2bb, SB 3-bets to 4bb in Heads-up · SB 0.5bb · ante 0.16bb · 5% rake, cap 2bb, 100bb: the big blind (BB) folds 31.9%, calls 50%, raises 9.2bb 14.6% and goes all-in 99.84bb 3.5%. Always call: 55, 33, A6s, A2s, K2s-K5s, Q3s-Q4s, J9s, J4s-J5s, T8s+, 96s, 93s, 87s, 76s, 64s, A7o, A3o-A4o, Q9o, J9o. Always raise 9.2bb: KK+, JJ, AKs, AJs, KQs, K9s-KTs, QJs. Mixed: QQ, 66-TT, AQs, ATs, A3s-A5s, K6s-K8s, Q9s-QTs, Q5s-Q7s, JTs, J6s-J8s, J2s-J3s, T7s, T4s-T5s, T2s, 97s+, 94s-95s, 86s, 83s, 72s-75s, 65s, 63s, 52s+, 43s, A8o+, A5o, KTo+, K5o-K8o, QTo+, Q6o-Q7o, JTo, J6o-J8o, T8o+, 97o+, 75o+, 65o, 54o.

Always fold
42s, Q5o, J5o, T7o, T5o, 87o, 84o-85o, 63o, 53o
Always call
55, 33, A6s, A2s, K2s-K5s, Q3s-Q4s, J9s, J4s-J5s, T8s+, 96s, 93s, 87s, 76s, 64s, A7o, A3o-A4o, Q9o, J9o
Always raise 9.2bb
KK+, JJ, AKs, AJs, KQs, K9s-KTs, QJs
Always all-in 99.84bb
No hand plays this every time
Mixed
QQ, 66-TT, AQs, ATs, A3s-A5s, K6s-K8s, Q9s-QTs, Q5s-Q7s, JTs, J6s-J8s, J2s-J3s, T7s, T4s-T5s, T2s, 97s+, 94s-95s, 86s, 83s, 72s-75s, 65s, 63s, 52s+, 43s, A8o+, A5o, KTo+, K5o-K8o, QTo+, Q6o-Q7o, JTo, J6o-J8o, T8o+, 97o+, 75o+, 65o, 54o
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.

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.