PokerSolver
PokerSolver/4-max · 80bb · 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) · 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
4-max · 80bb · 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

342 of 1,326 combos get here
Fold 63%Call 17.5%All-in 79.84bb 19.6%
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 80bb?

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, 80bb: the small blind (SB) folds 63%, calls 17.5% and goes all-in 79.84bb 19.6%. Always call: 55, AJs-AQs, KQs. Always all-in 79.84bb: JJ-KK, AKs, AKo. Mixed: AA, 66-TT, 44, ATs, A2s-A5s, KJs, Q9s+, T9s, 98s, 87s, 76s, 65s, 54s, AQo.

Always fold
A6s-A8s, K5s-KTs, Q8s, J8s+, T8s, 75s, ATo-AJo, KTo+, QJo, JTo
Always call
55, AJs-AQs, KQs
Always all-in 79.84bb
JJ-KK, AKs, AKo
Mixed
AA, 66-TT, 44, ATs, A2s-A5s, KJs, Q9s+, T9s, 98s, 87s, 76s, 65s, 54s, AQo
Settings: 4-max · 80bb · 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, 80bb stacks, 5% rake capped at 4.8bb; 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.