PokerSolver
PokerSolver/5-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs CO 4-bet 17.25bb

SB vs CO 4-bet 17.25bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 250bb · CO opens 2.5bb, SB 3-bets to 7.5bb, CO 4-bets to 17.25bb · 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
5-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 26.55bbYour cards?
7.5bb
1bb
17.25bb

Tap your two cards.

Small blind's range

262 of 1,326 combos get here
Fold 45%Call 45%Raise 37.95bb 9.5%All-in 249.84bb 0.5%
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, SB 3-bets to 7.5bb, CO 4-bets to 17.25bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 250bb?

CO opens 2.5bb, SB 3-bets to 7.5bb, CO 4-bets to 17.25bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 250bb: the small blind (SB) folds 45%, calls 45%, raises 37.95bb 9.5% and goes all-in 249.84bb 0.5%. Always call: JJ, 33-77, AJs, KQs, 76s, 65s, AKo. Always raise 37.95bb: AA. Mixed: QQ-KK, 88-TT, AQs+, A9s-ATs, A7s, A3s-A5s, KTs-KJs, QTs+, JTs, T8s+, 54s.

Always fold
A8s, A2s, K6s-K9s, J8s, 98s, AQo, KQo
Always call
JJ, 33-77, AJs, KQs, 76s, 65s, AKo
Always raise 37.95bb
AA
Always all-in 249.84bb
No hand plays this every time
Mixed
QQ-KK, 88-TT, AQs+, A9s-ATs, A7s, A3s-A5s, KTs-KJs, QTs+, JTs, T8s+, 54s
Settings: 5-max · 250bb · 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, 250bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.98). 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.