PokerSolver/Heads-up · 50bb · SB 0.5bb · no rake · chip EV/SB vs BB iso raise 2.5bb

SB vs BB iso raise 2.5bb

Heads-up · SB 0.5bb · no rake · chip EV (blinds 0.5/1bb, no ante) · 50bb · SB limps, BB isolates to 2.5bb · Small blind / button to act

Fits exactlyGGPoker Spin & Gold x50, x100, Maxpartypoker SPINS Overdrive 10-24.99x, 25-119.99x, 120-239.99x, 240x+WPT Global Global Spins x10, x25, x120, x240, x6,000

Close1 games

ACR Poker SPINZ x2, x3, x4, x5, x10, x25, x50, x100, x12,000its blinds are not published

Cash

Heads-up · 50bb · SB 0.5bb · no rake · chip EVChange game

PlayersBlinds & rakeStacks

Stacks (bb), if they differSBBB

Pot 3.5bbYour cards?

1bb

2.5bb

Tap your two cards.

Small blind / button's range

1,238 of 1,326 combos get here

Fold 18.6%Call 64.3%Raise 6.25bb 16.6%All-in 50bb 0.5%

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 limps, BB isolates to 2.5bb in Heads-up · SB 0.5bb · no rake · chip EV at 50bb?

SB limps, BB isolates to 2.5bb in Heads-up · SB 0.5bb · no rake · chip EV, 50bb: the small blind / button (SB) folds 18.6%, calls 64.3%, raises 6.25bb 16.6% and goes all-in 50bb 0.5%. Always call: 22-55, A6s-A8s, A2s-A4s, K9s-KTs, K2s-K7s, Q8s+, Q2s-Q6s, J8s+, J2s-J6s, T3s+, 97s+, 94s-95s, 92s, 86s, 82s-84s, 73s+, 62s-64s, 53s, 32s, A4o-A6o, A2o, K8o, K3o-K5o, Q9o+, Q5o-Q6o, JTo, J8o, T7o+, 96o-97o, 86o+, 76o, 64o. Always raise 6.25bb: 99+, AQs+, ATs, Q7s, ATo-AQo. Mixed: 66-88, A9s, KJs+, J7s, T2s, 96s, 93s, 87s, 85s, 72s, 65s, 54s, 52s, 43s, AKo, A7o-A9o, A3o, K9o+, K6o-K7o, K2o, Q7o-Q8o, Q2o-Q4o, J9o, J6o-J7o, J4o, J2o, T4o-T6o, 98o, 95o, 85o, 75o, 65o, 53o+, 43o.

Always fold: J5o, J3o, T2o-T3o, 93o-94o, 84o, 73o-74o, 63o
Always call: 22-55, A6s-A8s, A2s-A4s, K9s-KTs, K2s-K7s, Q8s+, Q2s-Q6s, J8s+, J2s-J6s, T3s+, 97s+, 94s-95s, 92s, 86s, 82s-84s, 73s+, 62s-64s, 53s, 32s, A4o-A6o, A2o, K8o, K3o-K5o, Q9o+, Q5o-Q6o, JTo, J8o, T7o+, 96o-97o, 86o+, 76o, 64o
Always raise 6.25bb: 99+, AQs+, ATs, Q7s, ATo-AQo
Always all-in 50bb: No hand plays this every time
Mixed: 66-88, A9s, KJs+, J7s, T2s, 96s, 93s, 87s, 85s, 72s, 65s, 54s, 52s, 43s, AKo, A7o-A9o, A3o, K9o+, K6o-K7o, K2o, Q7o-Q8o, Q2o-Q4o, J9o, J6o-J7o, J4o, J2o, T4o-T6o, 98o, 95o, 85o, 75o, 65o, 53o+, 43o

Settings: Heads-up · 50bb · SB 0.5bb · no rake · chip EV (small blind 0.5bb, big blind 1bb, 50bb 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 32.63). 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; 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); worldpokerdeals.com/blog/winning-poker-network-new-1-000-000-spin-go (2025-12-05; stacks only), fetched 2026-10-31.