PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB iso raise 3bb

BB vs SB iso raise 3bb

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 3bb · 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 5.64bbYour cards?

1bb

3bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here

Fold 85.1%Call 8.2%Raise 6/9bb 6.7%

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, SB isolates to 3bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO limps, SB isolates to 3bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 85.1%, calls 8.2% and raises 6/9bb 6.7%. Always call: 77-99, 44, 22, KQs. Always raise 6/9bb: KK+, AKs. Mixed: TT-QQ, 55-66, 33, A2s-AQs, KTs-KJs, K8s, K4s-K6s, Q9s+, J9s+, T9s, 96s+, 87s, 76s, 73s, 64s+, 54s, AJo+, A5o, KJo+.

Always fold: K9s, K7s, K2s-K3s, Q2s-Q8s, J2s-J8s, T2s-T8s, 92s-95s, 82s-86s, 74s-75s, 72s, 62s-63s, 52s-53s, 42s+, 32s, A6o-ATo, A2o-A4o, K2o-KTo, Q2o+, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call: 77-99, 44, 22, KQs
Always raise 6/9bb: KK+, AKs
Mixed: TT-QQ, 55-66, 33, A2s-AQs, KTs-KJs, K8s, K4s-K6s, Q9s+, J9s+, T9s, 96s+, 87s, 76s, 73s, 64s+, 54s, AJo+, A5o, 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.

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.