PokerSolver/Heads-up · 50bb · SB 0.5bb · no rake · chip EV/SB vs BB iso raise 2bb

SB vs BB iso raise 2bb

Heads-up · SB 0.5bb · no rake · chip EV (blinds 0.5/1bb, no ante) · 50bb · SB limps, BB isolates to 2bb · 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 3bbYour cards?

1bb

2bb

Tap your two cards.

Small blind / button's range

1,238 of 1,326 combos get here

Fold 7.6%Call 70.9%Raise 5bb 20.1%All-in 50bb 1.4%

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 2bb in Heads-up · SB 0.5bb · no rake · chip EV at 50bb?

SB limps, BB isolates to 2bb in Heads-up · SB 0.5bb · no rake · chip EV, 50bb: the small blind / button (SB) folds 7.6%, calls 70.9%, raises 5bb 20.1% and goes all-in 50bb 1.4%. Always call: 66, 22-44, A7s-A9s, A2s-A3s, K9s, K4s-K5s, K2s, QTs, Q6s-Q8s, Q2s-Q4s, JTs, J5s-J7s, J2s, T9s, T2s-T4s, 92s-93s, 87s, 84s-85s, 82s, 73s-75s, 64s, 52s+, A3o-A4o, K7o-K9o, K2o-K3o, Q9o+, Q6o, Q2o-Q4o, JTo, J7o-J8o, J4o-J5o, T9o, T6o, 96o+, 85o+, 75o+, 65o, 53o+. Always raise 5bb: TT+, AQs+, KQs, AJo, KQo, Q7o. Always all-in 50bb: 99. Mixed: 77-88, 55, ATs, A6s, A4s, KTs-KJs, K6s-K7s, K3s, QJs, Q9s, Q5s, J8s-J9s, J3s-J4s, T5s-T8s, 94s+, 86s, 83s, 76s, 72s, 65s, 62s-63s, 43s, 32s, AQo+, A5o-ATo, A2o, KTo-KJo, K4o-K6o, Q8o, Q5o, J9o, J6o, J2o-J3o, T7o-T8o, T2o-T5o, 94o-95o, 84o, 74o, 63o-64o, 43o.

Always fold: 93o, 73o
Always call: 66, 22-44, A7s-A9s, A2s-A3s, K9s, K4s-K5s, K2s, QTs, Q6s-Q8s, Q2s-Q4s, JTs, J5s-J7s, J2s, T9s, T2s-T4s, 92s-93s, 87s, 84s-85s, 82s, 73s-75s, 64s, 52s+, A3o-A4o, K7o-K9o, K2o-K3o, Q9o+, Q6o, Q2o-Q4o, JTo, J7o-J8o, J4o-J5o, T9o, T6o, 96o+, 85o+, 75o+, 65o, 53o+
Always raise 5bb: TT+, AQs+, KQs, AJo, KQo, Q7o
Always all-in 50bb: 99
Mixed: 77-88, 55, ATs, A6s, A4s, KTs-KJs, K6s-K7s, K3s, QJs, Q9s, Q5s, J8s-J9s, J3s-J4s, T5s-T8s, 94s+, 86s, 83s, 76s, 72s, 65s, 62s-63s, 43s, 32s, AQo+, A5o-ATo, A2o, KTo-KJo, K4o-K6o, Q8o, Q5o, J9o, J6o, J2o-J3o, T7o-T8o, T2o-T5o, 94o-95o, 84o, 74o, 63o-64o, 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.