Guides: what the numbers behind casino games mean
Plain explanations of how crash and instant games work, with the working shown and a tool to check every claim yourself.
All guides
Why no crash predictor can work
The next round is fixed before you bet, and nobody outside can read it.
Updated 13 Nov 2026 · 4 min read
How toHow to check that an Aviator round was fair
Recompute any finished round from its seeds, without placing a bet.
Updated 12 Nov 2026 · 4 min read
BasicsWhat RTP means in crash games
The one figure that sets your chance to reach a target and what play costs.
Updated 12 Nov 2026 · 4 min read
StrategyDoes Martingale work on crash games?
Doubling after a loss wins often and loses big. Here is the arithmetic.
Updated 12 Nov 2026 · 3 min read
Game guideMines: how many mines to pick
More mines pay more and end sooner. What the choice changes and what it cannot.
Updated 12 Nov 2026 · 3 min read
Game guidePlinko risk levels explained
Low, medium and high risk change the pay table, not the path of the ball.
Updated 12 Nov 2026 · 4 min read
OddsHow to read decimal, fractional and American odds
Three ways to write one price, and the chance each of them stands for.
Updated 13 Nov 2026 · 3 min read
MarginWhat bookmaker margin is and how to find fair odds
The cut built into every price, and how to take it back out.
Updated 13 Nov 2026 · 3 min read
StakingThe Kelly criterion explained with worked examples
How much to stake when you have an edge, and why most bettors stake less.
Updated 13 Nov 2026 · 3 min read
Sure betsHow arbitrage betting works and where it goes wrong
When two prices guarantee a profit on paper, and what can break it.
Updated 13 Nov 2026 · 3 min read
New guides are added as they are written and checked. Each one is built on a calculation you can repeat with the tools on this site.
The glossary of terms
38 terms, from server seed and nonce to RTP, variance and wagering, each in a few sentences with a link to the page where it matters.
MethodHow we test a casino
What we open, what we write down and what we leave unchecked when a casino is added to BetProof.
How BetProof guides are written
A guide here starts from a question players ask and answers it with arithmetic. No guide promises a win or a way around the house edge, because there is none. Where a figure comes from a casino, the page names the casino and the date it was read. Where we have not checked something, the guide says so instead of filling the gap.