PokerSolver
PokerSolver/6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB iso raise 2.5bb

BB vs SB iso raise 2.5bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 40bb · CO 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
Tournament
6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.46bbYour cards?
1bb
1bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 76.9%Call 13.8%Raise 5/7.5bb 9.3%
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 2.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 40bb?

CO limps, SB isolates to 2.5bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 40bb: the big blind (BB) folds 76.9%, calls 13.8% and raises 5/7.5bb 9.3%. Always call: 22-88, A9s-AJs, A7s, A5s, KJs+, T9s. Always raise 5/7.5bb: TT+, AQs+, K6s, AKo. Mixed: 99, A8s, A6s, A2s-A4s, K7s-KTs, K4s, K2s, Q8s+, Q4s-Q6s, Q2s, J8s+, T7s-T8s, T5s, 98s, 86s, 75s+, 64s+, 52s+, A9o-AQo, A7o, A5o, KTo+, QTo+.

Always fold
K5s, K3s, Q7s, Q3s, J2s-J7s, T6s, T2s-T4s, 92s-97s, 87s, 82s-85s, 72s-74s, 62s-63s, 42s+, 32s, A8o, A6o, A2o-A4o, K2o-K9o, Q2o-Q9o, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
22-88, A9s-AJs, A7s, A5s, KJs+, T9s
Always raise 5/7.5bb
TT+, AQs+, K6s, AKo
Mixed
99, A8s, A6s, A2s-A4s, K7s-KTs, K4s, K2s, Q8s+, Q4s-Q6s, Q2s, J8s+, T7s-T8s, T5s, 98s, 86s, 75s+, 64s+, 52s+, A9o-AQo, A7o, A5o, KTo+, QTo+
Settings: 6-max · 40bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 40bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.93). 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.