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

BB vs SB call

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · CO opens 2bb, SB calls · 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
Stacks (bb), if they differ
Pot 5.64bbYour cards?
1bb
2bb
2bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 48.3%Call 40.3%Raise 4/6bb 11.3%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when CO opens 2bb, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 100bb?

CO opens 2bb, SB calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 100bb: the big blind (BB) folds 48.3%, calls 40.3% and raises 4/6bb 11.3%. Always call: 22-66, ATs, A7s-A8s, A5s, A2s-A3s, K8s-K9s, K5s, K2s-K3s, Q7s, Q4s-Q5s, Q2s, T6s, 95s, 85s, 64s, 52s-53s, 43s, A7o-A9o, A4o, KTo-KJo, QTo+, JTo, T8o+, 76o, 64o+, 53o. Always raise 4/6bb: 99+, AQs+, KQs, QJs, JTs, AKo. Mixed: 77-88, AJs, A9s, A6s, A4s, KTs-KJs, K6s-K7s, K4s, Q8s-QTs, Q6s, Q3s, J8s-J9s, J2s-J6s, T7s+, T2s-T4s, 96s+, 92s-94s, 86s+, 84s, 82s, 72s+, 65s, 62s-63s, 54s, 42s, 32s, ATo-AQo, A5o, A2o-A3o, KQo, K7o-K9o, Q8o-Q9o, J9o, T7o, 96o+, 86o+, 75o, 54o, 43o.

Always fold
J7s, T5s, 83s, A6o, K2o-K6o, Q2o-Q7o, J2o-J8o, T2o-T6o, 92o-95o, 82o-85o, 72o-74o, 62o-63o, 52o, 42o, 32o
Always call
22-66, ATs, A7s-A8s, A5s, A2s-A3s, K8s-K9s, K5s, K2s-K3s, Q7s, Q4s-Q5s, Q2s, T6s, 95s, 85s, 64s, 52s-53s, 43s, A7o-A9o, A4o, KTo-KJo, QTo+, JTo, T8o+, 76o, 64o+, 53o
Always raise 4/6bb
99+, AQs+, KQs, QJs, JTs, AKo
Mixed
77-88, AJs, A9s, A6s, A4s, KTs-KJs, K6s-K7s, K4s, Q8s-QTs, Q6s, Q3s, J8s-J9s, J2s-J6s, T7s+, T2s-T4s, 96s+, 92s-94s, 86s+, 84s, 82s, 72s+, 65s, 62s-63s, 54s, 42s, 32s, ATo-AQo, A5o, A2o-A3o, KQo, K7o-K9o, Q8o-Q9o, J9o, T7o, 96o+, 86o+, 75o, 54o, 43o
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.