PokerSolver/Heads-up · 20bb · SB 0.5bb · no rake · chip EV/K9s

How to play K9s preflop

Heads-up · 20bb · SB 0.5bb · no rake · chip EV · 18 spots where K9s gets a decision

Fits exactlyGGPoker Spin & Gold x2, x3, x4, x5, x10, x50, x100, MaxPokerStars Spin & Go x2, x3, x4, x5, x10, x25, x50, x100, top tierpartypoker SPINS Overdrive 2-2.99x, 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

Close4 games

Winamax Expresso x2, x3, x4, x5, x10, x20, x100, x400, x1,000, jackpotits pages do not say whether any level has an ante
Winamax Expresso Nitro every multiplierits 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

Opens (raise first in)

Spot	K9s
SB open (RFI) First to act	Call 98.6% · Raise 2/2.5/3bb 1.4%

Facing an open or a limp

Spot	K9s
BB vs SB limp SB limps	Call 98.2% · Raise 2/2.5/3bb 1.9%
BB vs SB open 2bb SB opens 2bb	Call 98.2% · All-in 20bb 1.8%
BB vs SB open 2.5bb SB opens 2.5bb	All-in 20bb 64.7% · Call 32.4% · Raise 6.25bb 3%
BB vs SB open 3bb SB opens 3bb	Call 73.2% · All-in 20bb 14.5% · Raise 7.5bb 12.3%
BB vs SB all-in SB goes all-in	Fold 65.9% · Call 34.1%

Facing an isolation raise

Spot	K9s
SB vs BB iso raise 2bb SB limps, BB isolates to 2bb	Call 100%
SB vs BB iso raise 2.5bb SB limps, BB isolates to 2.5bb	Call 100%
SB vs BB iso raise 3bb SB limps, BB isolates to 3bb	Call 100%
SB vs BB all-in SB limps, BB goes all-in	Call 99.9% · Fold 0.1%

Facing a 3-bet

Spot	K9s
BB vs SB 3-bet 5bb SB limps, BB isolates to 2bb, SB 3-bets to 5bb	Call 99.3% · All-in 20bb 0.7%
BB vs SB all-in SB limps, BB isolates to 2bb, SB goes all-in	Fold 100%
SB vs BB 3-bet 5bb SB opens 2bb, BB 3-bets to 5bb	Call 100%
SB vs BB all-in SB opens 2bb, BB goes all-in	Call 99.6% · Fold 0.4%
SB vs BB 3-bet 6.25bb SB opens 2.5bb, BB 3-bets to 6.25bb	Call 96.8% · All-in 20bb 3.2%
SB vs BB all-in SB opens 2.5bb, BB goes all-in	Call 100%

Facing a 4-bet

Spot	K9s
BB vs SB all-in SB opens 2.5bb, BB 3-bets to 6.25bb, SB goes all-in	Call 100%
BB vs SB all-in SB opens 3bb, BB 3-bets to 7.5bb, SB goes all-in	Call 100%

Settings: Heads-up · 20bb · SB 0.5bb · no rake · chip EV (small blind 0.5bb, big blind 1bb, 20bb 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 8.78). 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.