PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB iso raise 2bb

BB vs SB iso raise 2bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO limps, SB isolates to 2bb · 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

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

PlayersBlinds & rakeEff. stack

Stacks (bb), if they differCOBTNSBBB

Pot 4.64bbYour cards?

1bb

2bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here

Fold 78.4%Call 11.3%Raise 4/6bb 10.3%

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, SB isolates to 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO limps, SB isolates to 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 78.4%, calls 11.3% and raises 4/6bb 10.3%. Always call: 55-77, 22, KQs, Q2s, J9s. Always raise 4/6bb: QQ+, AKs, AJs, KJs, AKo. Mixed: 88-JJ, 33-44, AQs, A2s-ATs, K2s-KTs, Q5s+, JTs, J7s, T5s+, 97s+, 87s, 84s, 82s, 75s+, 63s+, 52s+, 42s, ATo-AQo, KQo, KTo, QTo+, T7o, 65o.

Always fold: Q3s-Q4s, J8s, J2s-J6s, T2s-T4s, 92s-96s, 85s-86s, 83s, 72s-74s, 62s, 43s, 32s, A2o-A9o, KJo, K2o-K9o, Q2o-Q9o, J2o+, T8o+, T2o-T6o, 92o+, 82o+, 72o+, 62o-64o, 52o+, 42o+, 32o
Always call: 55-77, 22, KQs, Q2s, J9s
Always raise 4/6bb: QQ+, AKs, AJs, KJs, AKo
Mixed: 88-JJ, 33-44, AQs, A2s-ATs, K2s-KTs, Q5s+, JTs, J7s, T5s+, 97s+, 87s, 84s, 82s, 75s+, 63s+, 52s+, 42s, ATo-AQo, KQo, KTo, QTo+, T7o, 65o

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.