PokerSolver
PokerSolver/4-max · 200bb · 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) · 200bb · CO opens 2.5bb, SB 3-bets to 7.5bb, CO 4-bets to 17.25bb · Small blind to act

4-max · 200bb · 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

266 of 1,326 combos get here
Fold 42.8%Call 42.5%Raise 37.95bb 14.3%All-in 199.84bb 0.4%
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 200bb?

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, 200bb: the small blind (SB) folds 42.8%, calls 42.5%, raises 37.95bb 14.3% and goes all-in 199.84bb 0.4%. Always call: JJ, 22-66, AJs-AQs, 97s, 76s, 65s, 54s. Always raise 37.95bb: AA. Mixed: QQ-KK, 77-TT, AKs, ATs, A7s, A3s-A5s, KQs, KTs, QJs, J9s+, T9s, 87s, AKo.

Always fold
A8s-A9s, A6s, KJs, K4s-K9s, QTs, T8s, AQo, KJo+
Always call
JJ, 22-66, AJs-AQs, 97s, 76s, 65s, 54s
Always raise 37.95bb
AA
Always all-in 199.84bb
No hand plays this every time
Mixed
QQ-KK, 77-TT, AKs, ATs, A7s, A3s-A5s, KQs, KTs, QJs, J9s+, T9s, 87s, AKo
Settings: 4-max · 200bb · 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, 200bb stacks, 5% rake capped at 4.8bb; 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.

Fits exactly: no game we have checked.

Close: CoinPoker cash with antes NL50 (rake before the flop in 3-bet pots there, none here).

Rake sources: 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.