PokerSolver
PokerSolver/4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/SB vs BTN call

SB vs BTN call

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · CO opens 2.5bb, BTN calls · Small 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 · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 7.14bbYour cards?
0.5bb
1bb
2.5bb
2.5bb

Tap your two cards.

  • The solve has no call for Small blind here: a call would make it a 3-way pot, and this solve stops before that. Multiway pots like this aren't covered yet, so only fold or raise can be shown.

Small blind's range

1,326 of 1,326 combos get here
Fold 91.9%Raise 5/7.5bb 8.1%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when CO opens 2.5bb, BTN calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 250bb?

CO opens 2.5bb, BTN calls in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 250bb: the small blind (SB) folds 91.9% and raises 5/7.5bb 8.1%. Always raise 5/7.5bb: 88+, 66, AQs+, KJs+, AKo. Mixed: 77, 33-55, ATs-AJs, A4s-A7s, A2s, KTs, QTs+, JTs, 98s.

Always fold
22, A8s-A9s, A3s, K2s-K9s, Q2s-Q9s, J2s-J9s, T2s+, 92s-97s, 82s+, 72s+, 62s+, 52s+, 42s+, 32s, A2o-AQo, K2o+, Q2o+, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always raise 5/7.5bb
88+, 66, AQs+, KJs+, AKo
Mixed
77, 33-55, ATs-AJs, A4s-A7s, A2s, KTs, QTs+, JTs, 98s
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.