PokerSolver
PokerSolver/4-max · 250bb · 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) · 250bb · 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 · 250bb · 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 79.1%Call 12.5%Raise 5/7.5bb 8.5%
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 250bb?

BTN limps, SB isolates to 2.5bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 250bb: the big blind (BB) folds 79.1%, calls 12.5% and raises 5/7.5bb 8.5%. Always call: 55, AQo. Always raise 5/7.5bb: AA, AQs, KJs. Mixed: 66-KK, 22-44, AKs, A2s-AJs, KQs, K2s-KTs, Q8s+, Q3s-Q5s, J7s+, J4s, T8s+, 98s, 96s, 87s, 74s+, 64s+, 54s, 42s+, AKo, A9o-AJo, A3o, KTo+, QTo+, T9o, T7o, 54o.

Always fold
Q6s-Q7s, Q2s, J5s-J6s, J2s-J3s, T2s-T7s, 97s, 92s-95s, 82s-86s, 72s-73s, 62s-63s, 52s-53s, 32s, A4o-A8o, A2o, K2o-K9o, Q2o-Q9o, J2o+, T8o, T2o-T6o, 92o+, 82o+, 72o+, 62o+, 52o-53o, 42o+, 32o
Always call
55, AQo
Always raise 5/7.5bb
AA, AQs, KJs
Mixed
66-KK, 22-44, AKs, A2s-AJs, KQs, K2s-KTs, Q8s+, Q3s-Q5s, J7s+, J4s, T8s+, 98s, 96s, 87s, 74s+, 64s+, 54s, 42s+, AKo, A9o-AJo, A3o, KTo+, QTo+, T9o, T7o, 54o
Settings: 4-max · 250bb · 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, 250bb stacks, 5% rake capped at 4.8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.91). 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.