PokerSolver
PokerSolver/4-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/BB vs SB iso raise 2.5bb

BB vs SB iso raise 2.5bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · BTN limps, SB isolates to 2.5bb · 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
Stacks (bb), if they differ
Pot 5.14bbYour cards?
1bb
1bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 72.6%Call 15.3%Raise 5/7.5bb 12.1%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when BTN limps, SB isolates to 2.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

BTN limps, SB isolates to 2.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 72.6%, calls 15.3% and raises 5/7.5bb 12.1%. Always call: 22-66, A9s, A6s, A4s, K7s, Q9s-QTs, 53s, ATo. Always raise 5/7.5bb: JJ+, AQs+, AQo+. Mixed: 77-TT, ATs-AJs, A7s-A8s, A5s, A2s-A3s, K8s+, K2s-K6s, QJs, Q6s-Q8s, Q2s-Q4s, J8s+, J5s, T6s+, T4s, 96s+, 85s+, 74s+, 63s+, 54s, 43s, 32s, AJo, A9o, A5o-A6o, KTo+, QTo+, J9o+.

Always fold
Q5s, J6s-J7s, J2s-J4s, T5s, T2s-T3s, 92s-95s, 82s-84s, 72s-73s, 62s, 52s, 42s, A7o-A8o, A2o-A4o, K2o-K9o, Q2o-Q9o, J2o-J8o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
22-66, A9s, A6s, A4s, K7s, Q9s-QTs, 53s, ATo
Always raise 5/7.5bb
JJ+, AQs+, AQo+
Mixed
77-TT, ATs-AJs, A7s-A8s, A5s, A2s-A3s, K8s+, K2s-K6s, QJs, Q6s-Q8s, Q2s-Q4s, J8s+, J5s, T6s+, T4s, 96s+, 85s+, 74s+, 63s+, 54s, 43s, 32s, AJo, A9o, A5o-A6o, KTo+, QTo+, J9o+
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.