PokerSolver
PokerSolver/4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb/SB vs BTN open 2bb

SB vs BTN open 2bb

4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb (blinds 0.5/1bb, ante 0.16bb) · 80bb · BTN opens 2bb · Small blind to act

4-max · 80bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bbChange game
Stacks (bb), if they differ
Pot 4.14bbYour cards?
0.5bb
1bb
2bb

Tap your two cards.

Small blind's range

1,326 of 1,326 combos get here
Fold 73.5%Call 11.1%Raise 4/6bb 15.4%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when BTN opens 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb at 80bb?

BTN opens 2bb in 4-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 4.8bb, 80bb: the small blind (SB) folds 73.5%, calls 11.1% and raises 4/6bb 15.4%. Always call: 22-33, A2s, J8s, A9o, KTo. Always raise 4/6bb: QQ+, 77-88, A9s+, KTs+, Q9s+, J9s+, T9s, 98s, AJo, KQo. Mixed: 99-JJ, 44-66, A3s-A8s, K4s-K9s, K2s, Q8s, Q5s, T7s-T8s, 97s, 86s+, 76s, 65s, 54s, AQo+, ATo, A8o, KJo, QTo+, JTo.

Always fold
K3s, Q6s-Q7s, Q2s-Q4s, J2s-J7s, T2s-T6s, 92s-96s, 82s-85s, 72s-75s, 62s-64s, 52s-53s, 42s+, 32s, A2o-A7o, K2o-K9o, Q2o-Q9o, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
22-33, A2s, J8s, A9o, KTo
Always raise 4/6bb
QQ+, 77-88, A9s+, KTs+, Q9s+, J9s+, T9s, 98s, AJo, KQo
Mixed
99-JJ, 44-66, A3s-A8s, K4s-K9s, K2s, Q8s, Q5s, T7s-T8s, 97s, 86s+, 76s, 65s, 54s, AQo+, ATo, A8o, KJo, QTo+, JTo
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.

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.