PokerSolver
PokerSolver/5-max · 80bb · 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) · 80bb · 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
Tournament
5-max · 80bb · 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

324 of 1,326 combos get here
Fold 61%Call 15.1%All-in 79.84bb 23.9%
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 80bb?

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, 80bb: the small blind (SB) folds 61%, calls 15.1% and goes all-in 79.84bb 23.9%. Always call: 55, ATs-AJs, KQs, 87s. Always all-in 79.84bb: JJ+, 99, 77, AKs, AKo. Mixed: TT, 88, 66, 44, AQs, A8s, A2s-A5s, KTs-KJs, Q9s+, 98s, 76s, 65s, 54s, AQo.

Always fold
A6s-A7s, K7s-K9s, K4s-K5s, Q8s, J8s+, T8s+, ATo-AJo, KJo+, QJo, JTo
Always call
55, ATs-AJs, KQs, 87s
Always all-in 79.84bb
JJ+, 99, 77, AKs, AKo
Mixed
TT, 88, 66, 44, AQs, A8s, A2s-A5s, KTs-KJs, Q9s+, 98s, 76s, 65s, 54s, AQo
Settings: 5-max · 80bb · 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, 80bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.95). 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.