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 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 51bbYour cards?

1bb

50bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here

Fold 79%Call 21%

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

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

SB goes all-in in Heads-up · SB 0.5bb · no rake · chip EV, 50bb: the big blind (BB) folds 79% and calls 21%. Always call: 55+, AQs+, ATs, KTs-KJs, T9s, AJo+. Mixed: 22-44, AJs, A6s-A9s, A2s-A4s, KQs, K8s-K9s, K5s, K2s, Q8s+, Q3s-Q5s, J8s+, J5s-J6s, J3s, T6s-T8s, 98s, 84s+, 74s, 64s+, 43s, A5o-ATo, A2o, KQo, K9o, K6o-K7o, K2o, Q9o-QTo, J8o-J9o, T9o, T7o.

Always fold: A5s, K6s-K7s, K3s-K4s, Q6s-Q7s, Q2s, J7s, J4s, J2s, T2s-T5s, 92s-97s, 82s-83s, 75s+, 72s-73s, 62s-63s, 52s+, 42s, 32s, A3o-A4o, KTo-KJo, K8o, K3o-K5o, QJo, Q2o-Q8o, JTo, J2o-J7o, T8o, T2o-T6o, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call: 55+, AQs+, ATs, KTs-KJs, T9s, AJo+
Mixed: 22-44, AJs, A6s-A9s, A2s-A4s, KQs, K8s-K9s, K5s, K2s, Q8s+, Q3s-Q5s, J8s+, J5s-J6s, J3s, T6s-T8s, 98s, 84s+, 74s, 64s+, 43s, A5o-ATo, A2o, KQo, K9o, K6o-K7o, K2o, Q9o-QTo, J8o-J9o, T9o, T7o

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.