PokerSolver/Heads-up · 50bb · SB 0.5bb · no rake · chip EV/BB vs SB all-in

BB vs SB all-in

Heads-up · SB 0.5bb · no rake · chip EV (blinds 0.5/1bb, no ante) · 50bb · SB limps, BB isolates to 2.5bb, SB goes all-in · Big blind 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 52.5bbYour cards?

2.5bb

50bb

Tap your two cards.

Big blind's range

1,070 of 1,326 combos get here

Fold 82%Call 18%

Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when SB limps, BB isolates to 2.5bb, SB goes all-in in Heads-up · SB 0.5bb · no rake · chip EV at 50bb?

SB limps, BB isolates to 2.5bb, SB goes all-in in Heads-up · SB 0.5bb · no rake · chip EV, 50bb: the big blind (BB) folds 82% and calls 18%. Always call: 88+, ATs+, AKo. Mixed: 44-77, 22, A3s-A9s, K9s+, K5s, K3s, QTs+, Q5s-Q6s, J9s+, J4s, T8s, 95s, 87s, 85s, 76s, 74s, 65s, 52s, ATo-AQo, A6o-A8o, K9o+, QJo, J9o.

Always fold: 33, A2s, K6s-K8s, K4s, K2s, Q7s-Q9s, Q2s-Q4s, J5s-J8s, J3s, T9s, T7s, T4s-T5s, T2s, 96s+, 93s-94s, 86s, 82s-84s, 75s, 72s-73s, 62s-64s, 53s+, 42s+, 32s, A9o, A2o-A5o, K4o-K8o, Q7o-QTo, Q5o, Q3o, JTo, J5o-J8o, J2o, T7o+, T5o, 95o+, 85o-86o, 74o+, 64o+, 53o+
Always call: 88+, ATs+, AKo
Mixed: 44-77, 22, A3s-A9s, K9s+, K5s, K3s, QTs+, Q5s-Q6s, J9s+, J4s, T8s, 95s, 87s, 85s, 76s, 74s, 65s, 52s, ATo-AQo, A6o-A8o, K9o+, QJo, J9o

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.