PokerSolver
PokerSolver/4-max · 200bb · 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) · 200bb · 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
4-max · 200bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 4.64bbYour cards?
1bb
1bb
2bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 80.4%Call 13.4%Raise 4/6bb 6.2%
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 200bb?

CO limps, SB isolates to 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 200bb: the big blind (BB) folds 80.4%, calls 13.4% and raises 4/6bb 6.2%. Always call: KK, 55, AJs. Always raise 4/6bb: 99. Mixed: AA, TT-QQ, 66-88, 22-44, AQs+, A2s-ATs, K9s+, K6s-K7s, K2s-K3s, Q9s+, Q5s-Q6s, J8s+, J6s, T9s, T7s, 98s, 84s+, 76s, 63s-64s, 52s+, 42s, 32s, AJo+, KQo, KTo, QTo, JTo, T9o, 54o.

Always fold
K8s, K4s-K5s, Q7s-Q8s, Q2s-Q4s, J7s, J2s-J5s, T8s, T2s-T6s, 92s-97s, 82s-83s, 72s-75s, 65s, 62s, 43s, A2o-ATo, KJo, K2o-K9o, QJo, Q2o-Q9o, J2o-J9o, T2o-T8o, 92o+, 82o+, 72o+, 62o+, 52o-53o, 42o+, 32o
Always call
KK, 55, AJs
Always raise 4/6bb
99
Mixed
AA, TT-QQ, 66-88, 22-44, AQs+, A2s-ATs, K9s+, K6s-K7s, K2s-K3s, Q9s+, Q5s-Q6s, J8s+, J6s, T9s, T7s, 98s, 84s+, 76s, 63s-64s, 52s+, 42s, 32s, AJo+, KQo, KTo, QTo, JTo, T9o, 54o
Settings: 4-max · 200bb · 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, 200bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.