PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB call

BB vs SB call

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO limps, BTN isolates to 3bb, SB calls · Big blind to act

4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differCOBTNSBBB

Pot 8.64bbYour cards?

1bb

3bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here

Fold 87.2%Call 4.7%Raise 6/9bb 8.1%

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

What is the GTO play for the big blind (BB) when CO limps, BTN isolates to 3bb, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO limps, BTN isolates to 3bb, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 87.2%, calls 4.7% and raises 6/9bb 8.1%. Always call: 22. Always raise 6/9bb: JJ+, AKs, AKo. Mixed: 44-TT, A4s-AQs, A2s, K6s+, QTs+, Q8s, Q5s, J8s+, J4s, T6s+, T4s, 96s+, 94s, 85s-86s, 63s, 53s+, AJo-AQo, KJo+.

Always fold: 33, A3s, K2s-K5s, Q9s, Q6s-Q7s, Q2s-Q4s, J5s-J7s, J2s-J3s, T5s, T2s-T3s, 95s, 92s-93s, 87s, 82s-84s, 72s+, 64s+, 62s, 52s, 42s+, 32s, A2o-ATo, K2o-KTo, Q2o+, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call: 22
Always raise 6/9bb: JJ+, AKs, AKo
Mixed: 44-TT, A4s-AQs, A2s, K6s+, QTs+, Q8s, Q5s, J8s+, J4s, T6s+, T4s, 96s+, 94s, 85s-86s, 63s, 53s+, AJo-AQo, KJo+

Settings: 4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 100bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.66). 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.