Treasure Island fairness check
Across 166,555 recorded rounds, Treasure Island has at least one figure near the edge of what chance explains. With 177 checks running on this monitor, a borderline result turns up now and then by chance alone.
All recorded rounds, judged together with every other check on the monitor.
| Check | Measured (95% range) | Stated | Rounds | Status |
|---|---|---|---|---|
| Whole wheel8 outcomes, chi-square 24.0 on 7 degrees of freedom | p 0.0011 | Published layout | 166,555 | Borderline |
| 1 | 33.10% (32.87 to 33.32) | 33.33% | 166,555 | Consistent |
| 2 | 27.53% (27.32 to 27.75) | 27.78% | 166,555 | Consistent |
| 5 | 15.01% (14.84 to 15.18) | 14.81% | 166,555 | Consistent |
| 10 | 7.375% (7.250 to 7.501) | 7.407% | 166,555 | Consistent |
| John Silver's Loot | 7.477% (7.351 to 7.604) | 7.407% | 166,555 | Consistent |
| Billy Bones' Map | 3.814% (3.723 to 3.907) | 3.704% | 166,555 | Consistent |
| Ben's Lost Marbles | 3.775% (3.684 to 3.867) | 3.704% | 166,555 | Consistent |
| Captain Flint's Treasure | 1.922% (1.857 to 1.989) | 1.852% | 166,555 | Consistent |
| Bet on 1 | 96.01% (95.15 to 96.85) | 96.55% | 166,555 | Consistent |
| Bet on 2 | 95.57% (94.69 to 96.42) | 96.54% | 166,555 | Consistent |
| Bet on 5 | 97.89% (96.69 to 99.09) | 96.54% | 166,555 | Consistent |
| Bet on 10 | 96.38% (94.36 to 98.44) | 96.55% | 166,555 | Consistent |
How we calculate this
How often each result lands is compared with the published wheel or table layout (a chi-square test across all results, plus each result on its own). Where our recorded rounds price a bet exactly, its return per 1 staked is measured with a 95% range from 2,000 resamples of the rounds, and compared with the provider's published RTP.
Every check gets a two-sided p-value. Because 177 checks run on this monitor at once, the p-values are corrected with the Holm method before a result counts as not consistent (corrected p below 0.01). A result with an uncorrected p below 0.01 is shown as borderline. These thresholds are set in advance and are the same for every game. Full method.
Published figures: Pragmatic Play's published per-bet RTP.