A1. Survival probability (hypergeometric, without replacement)
For N = 25 tiles and S = 25 − mines safe tiles, the probability of k consecutive safe reveals is:
P(k) = Π (from i = 0 to k−1) of (S − i) ÷ (N − i)
Worked example, 5 mines, 4 clicks: (20/25) × (19/24) × (18/23) × (17/22) = 0.3826, which is 38.26%.
A2. Fair multiplier
M(k) = RTP ÷ P(k). At RTP 0.98 and P(4) = 0.3826, M = 2.56×. Provider tables may round down slightly or bake the edge in unevenly across steps, so use the info panel's table as authoritative for payouts, and this formula as a sanity check.
A3. Correction to a commonly circulated figure
Some strategy write-ups state that three safe reveals with one mine succeeds about 74%. That is incorrect for a 5×5 board: the correct value is 22/25 = 88.0%, because probabilities are drawn without replacement from a shrinking pool. The retired figure is recorded here for transparency; the tables in this guide use the corrected calculation throughout.
A4. Correction to provider terminology
Widely republished descriptions call Mines a "slot", a "slot machine" or part of a "slots portfolio". This is inaccurate: Mines has no reels, paylines or spin result. Correct classifications are instant-win, crash-style or minefield game. The incorrect terminology is noted here only so readers can recognise low-quality sources.
A5. Sources referenced in this guide
Gambling participation in Australia 2024 (ANUpoll / ANU, 2024); NSW Gambling Survey 2024 (Central Queensland University / NSW Responsible Gambling Fund, 2024); National Gambling Trends Study 2023 and Consumer Perspectives Summary (Australian Institute of Family Studies, 2023); Australian Gambling Statistics (2023); Rocket: Analyzing RTP, payoff distribution and player behaviour in crash games (UNLV Gaming Institute, 2023); ASA Regulatory Statement on Gambling Advertising Guidance (2023); Journal of Behavioral Addictions (2023); National Consumer Protection Framework for Online Wagering (Australian Government, 2018, updated 2022); ACMA Reports on Action Against Interactive Gambling (2023); Qualitative research on young adults gambling online in the ACT (ANU / ACT Commission for Gambling and Racing, 2024); UK Online Prize Draws and Competitions Market Study (UK Government Authority, 2023); NIST SP 800-124 Rev. 2 (2020); ENISA Threat Landscape for Mobile Apps (2023); OWASP Mobile Top 10 (2024).
A6. About this guide
Compiled by our iGaming research desk, which analyses instant-win and crash game mathematics, provider documentation and regulatory publications, and reviewed by Claire Bennett, senior casino content editor. Probability and multiplier tables were calculated independently for this article and are reproducible from the formulas in A1 and A2. Related coverage: iGaming platform analysis. Corrections and data requests are welcome; figures are current as at February 2026 and provider configurations can change without notice.
18+ only. Gamble responsibly. Chances are you're about to lose.