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 2bb, SB calls · 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

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

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differCOBTNSBBB

Pot 6.64bbYour cards?

1bb

2bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here

Fold 83.5%Call 6.8%Raise 4/6bb 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 CO limps, BTN isolates to 2bb, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO limps, BTN isolates to 2bb, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 83.5%, calls 6.8% and raises 4/6bb 9.7%. Always call: 77, T9s. Always raise 4/6bb: TT+, AQs, AKo. Mixed: 88-99, 33-66, AKs, A4s-AJs, A2s, K7s+, K4s, Q5s+, J5s+, T8s, T4s-T5s, 97s+, 85s+, 83s, 74s-75s, 65s, 52s-53s, 42s, 32s, AJo-AQo, KJo+, JTo, 53o.

Always fold: 22, A3s, K5s-K6s, K2s-K3s, Q2s-Q4s, J2s-J4s, T6s-T7s, T2s-T3s, 92s-96s, 84s, 82s, 76s, 72s-73s, 62s-64s, 54s, 43s, A2o-ATo, K2o-KTo, Q2o+, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o+, 54o, 52o, 42o+, 32o
Always call: 77, T9s
Always raise 4/6bb: TT+, AQs, AKo
Mixed: 88-99, 33-66, AKs, A4s-AJs, A2s, K7s+, K4s, Q5s+, J5s+, T8s, T4s-T5s, 97s+, 85s+, 83s, 74s-75s, 65s, 52s-53s, 42s, 32s, AJo-AQo, KJo+, JTo, 53o

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.

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.