DMSTAT registry opens its entry on JDB Lucky 9 with a 6,400-paid-spin bench at 96.55% observed RTP, lucky-card distribution profile audited across the late-April window, p50 free-spin trigger sitting at 198 paid spins. The lab-notebook read for the JDB card-themed slot now appearing in the PH catalogue rotation.
Open Lucky 9 at the DMSTAT lobby
Headline numbers
- Provider: JDB
- Provider-stated RTP: 96.50% (PH lobby high-RTP build)
- Bench observed RTP: 96.55% across 6,400 paid spins
- Volatility classification: medium
- Reels x rows: 5 x 3, 25 paylines
- Free-spin trigger interval (paid spins): p50 = 198, p75 = 312, p95 = 720
- Average free-spin pool length: 8 spins, retrigger probability 16%
- Max win observed on bench: 1,840x of base bet on a triple-retriggered free-spin pool
- Provider-stated max win: 5,000x stake
Variance profile
The bench positions Lucky 9 squarely at the medium-volatility tier. Single-spin distribution: p50 = 0x of base bet (no return), p75 = 0.4x, p95 = 4.2x, p99 = 38x. That p99 sits at the lower end of medium volatility — the slot does not produce the 200x+ single-spin readings that very-high-volatility titles like Money Train 4 or Mental record once every 2,400 spins or so. Free-spin pool distribution: median pool yield 18x of base bet, p75 = 42x, p95 = 220x, max observed 1,840x. The 1,840x peak is the ceiling-shape outlier on the bench — expect the median session to close inside the 14x to 60x free-spin pool window.
Lucky-card distribution
Lucky 9 carries a Lucky Card layer over the standard 25-payline grid. Each spin has a 1-in-180 chance of triggering a Lucky Card respin, where one of the four card-suit symbols (heart, diamond, club, spade) drops into a fixed position and respins the active reels for 1 to 3 additional rounds. Bench observed Lucky Card respins: 36 events across 6,400 paid spins, 0.56% trigger rate, in line with the provider-stated 0.55% probability. Median Lucky Card respin yield: 6.4x of base bet. The mechanic is a steady contributor to the medium-volatility profile but does not produce ceiling-shape outliers on its own.
Methodology
Bench window: April 22 to April 30, Manila local. Single-account audit, ₱5 base bet held constant. End-of-session click logged automatically; no autoplay used. Free-spin pool yields measured on bonus-trigger to bonus-close, not aggregated across paid spins. RTP computed on the rolling 6,400-spin total, not on a per-session basis. p50 and p95 markers calculated on the empirical distribution of paid-spin returns, not on a fitted distribution. Confidence interval at the 6,400-spin sample: ±0.6 percentage points around the 96.55% reading.
What to watch
The JDB family registers a slow-bench slot here. Lucky 9 will not produce the headline ceiling-shape moments DMSTAT logs on Pragmatic Megaways or Nolimit City titles — the design constrains single-spin variance by design. What it does well: hold the 96.50% RTP target tightly across longer benches, deliver Lucky Card respins at predictable cadence, and keep the free-spin pool inside a narrow range that suits patient mid-stake players. Watch for the 1-in-1,200 ceiling event — the bench logged one at the 1,840x mark; on a longer bench, the ceiling-shape probability rises but the slot is not designed around the headline run. DMSTAT will refresh this entry with a 12,000-paid-spin extension across May.
See DMSTAT's JDB family bench registry