PokerSolver
PokerSolver/4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/SB vs CO 4-bet 17.25bb

SB vs CO 4-bet 17.25bb

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, 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
4-max · 250bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 26.39bbYour cards?
7.5bb
1bb
17.25bb

Tap your two cards.

Small blind's range

238 of 1,326 combos get here
Fold 34.5%Call 53.9%Raise 37.95bb 10.9%All-in 249.84bb 0.6%
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 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 250bb?

CO opens 2.5bb, SB 3-bets to 7.5bb, CO 4-bets to 17.25bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 250bb: the small blind (SB) folds 34.5%, calls 53.9%, raises 37.95bb 10.9% and goes all-in 249.84bb 0.6%. Always call: 99-TT, 33-77, AJs, 76s, 65s, AKo. Always raise 37.95bb: AA. Mixed: JJ-KK, 88, AQs+, A8s-ATs, A3s-A5s, KTs+, QTs+, JTs, T8s, 98s, 86s+.

Always fold
A6s-A7s, K8s-K9s, K5s, J8s-J9s, T9s, AQo, KQo
Always call
99-TT, 33-77, AJs, 76s, 65s, AKo
Always raise 37.95bb
AA
Always all-in 249.84bb
No hand plays this every time
Mixed
JJ-KK, 88, AQs+, A8s-ATs, A3s-A5s, KTs+, QTs+, JTs, T8s, 98s, 86s+
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.