PokerSolver
PokerSolver/Heads-up · 25bb · SB 0.5bb · no rake · chip EV/SB vs BB 3-bet 6.25bb

SB vs BB 3-bet 6.25bb

Heads-up · SB 0.5bb · no rake · chip EV (blinds 0.5/1bb, no ante) · 25bb · SB opens 2.5bb, BB 3-bets to 6.25bb · Small blind / button to act

Fits exactlyGGPoker Spin & Gold x4, x5, x10, x50, x100, MaxPokerStars Spin & Go x4, x5, x10, x25, x50, x100, top tierpartypoker SPINS Overdrive 3-3.99x, 4-4.99x, 5-9.99x, 10-24.99x, 25-119.99x, 120-239.99x, 240x+WPT Global Global Spins x2, x3, x5, x10, x25, x120, x240, x6,000
Close3 games
  • Winamax Expresso x2, x3, x4, x5, x10, x20, x100, x400, x1,000, jackpotits pages do not say whether any level has an ante
  • iPoker Twister x2, x3, x5, x8, x50, x1,000its pages do not say whether any level has an ante
  • ACR Poker SPINZ x2, x3, x4, x5, x10, x25, x50, x100, x12,000its blinds are not published
Cash
Heads-up · 25bb · SB 0.5bb · no rake · chip EVChange game
Stacks (bb), if they differ
Pot 8.75bbYour cards?
2.5bb
6.25bb

Tap your two cards.

Small blind / button's range

1,058 of 1,326 combos get here
Fold 43.9%Call 40.2%All-in 25bb 15.8%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind / button (SB) when SB opens 2.5bb, BB 3-bets to 6.25bb in Heads-up · SB 0.5bb · no rake · chip EV at 25bb?

SB opens 2.5bb, BB 3-bets to 6.25bb in Heads-up · SB 0.5bb · no rake · chip EV, 25bb: the small blind / button (SB) folds 43.9%, calls 40.2% and goes all-in 25bb 15.8%. Always call: QQ+, 66-99, A9s, A5s, K8s+, Q9s+, Q7s, Q3s-Q4s, J7s-J9s, J5s, T9s, T6s, 96s, 85s-86s, 64s+, 53s+, A5o, K9o-KJo, Q9o-QTo, J9o, T9o. Always all-in 25bb: 22-44, AJs, ATo+, A6o. Mixed: TT-JJ, 55, AQs+, ATs, A6s-A8s, A2s-A4s, K7s, JTs, T4s-T5s, 95s, 84s, 74s, 52s, 42s, A7o-A9o, A2o-A4o, KQo, K7o-K8o, QJo, Q8o, JTo, J8o, 98o, 76o, 65o, 54o.

Always fold
T2s, 92s-94s, 82s-83s, 72s-73s, 62s, 32s, K2o-K6o, Q3o-Q7o, J3o-J7o, T6o-T8o, 95o-97o, 84o+, 75o, 64o, 53o, 43o
Always call
QQ+, 66-99, A9s, A5s, K8s+, Q9s+, Q7s, Q3s-Q4s, J7s-J9s, J5s, T9s, T6s, 96s, 85s-86s, 64s+, 53s+, A5o, K9o-KJo, Q9o-QTo, J9o, T9o
Always all-in 25bb
22-44, AJs, ATo+, A6o
Mixed
TT-JJ, 55, AQs+, ATs, A6s-A8s, A2s-A4s, K7s, JTs, T4s-T5s, 95s, 84s, 74s, 52s, 42s, A7o-A9o, A2o-A4o, KQo, K7o-K8o, QJo, Q8o, JTo, J8o, 98o, 76o, 65o, 54o
Settings: Heads-up · 25bb · SB 0.5bb · no rake · chip EV (small blind 0.5bb, big blind 1bb, 25bb stacks, no rake; chip EV: every chip is worth the same, as it is when only the winner is paid and heads-up). Solver: HoldemResources Calculator (HRC) (HRC CI 9.01). Bet sizes are the solved ones; a size that is not here plays like the nearest one.

Sources for the games it fits: ggpoker.com/poker-games/spin-gold (prize table in its script js/funds29.8816e65c.js; fetched 2026-10-31); chips and blinds from worldpokerdeals.com/blog/spin-gold-the-ultimate-guide-on-ggpoker-network (updated 2026-05-11; its 26-level blind table lists no ante) and somuchpoker.com/news/best-spin-and-go-poker-sites-2026 (updated 2026-10-16), fetched 2026-10-31; pokerstars.com/poker/spin-and-go (stacks and prize tables; fetched 2026-10-31); blinds from worldpokerdeals.com/blog/pokerstars-new-spin-go-multipliers-and-1000-spins (2026-05-27; its blind table lists no ante), fetched 2026-10-31; partypoker.com/en/poker/offers/dynamic-structure (stacks, prize shares and the 20-level blind table, which lists no ante), fetched 2026-10-31; wptglobal.com/how-to-play/global-spins (stacks and prize shares; fetched 2026-10-31); blinds from worldpokerdeals.com/blog/global-spins-wpt-global (2023-11-23; its blind table lists no ante) and somuchpoker.com/news/best-spin-and-go-poker-sites-2026 (2026-10-16); winamax.fr/expresso (stacks, first blinds and prize tables; the same on winamax.es), fetched 2026-10-31; worldpokerdeals.com/blog/ipoker-twister-guide (2026-01-29; stacks and splits) and pokerstrategy.com/strategy/sit-and-go/twister-poker-let-go (first blinds), fetched 2026-10-31; worldpokerdeals.com/blog/winning-poker-network-new-1-000-000-spin-go (2025-12-05; stacks only), fetched 2026-10-31.