Editorial

Who writes this, and how to check it.

SlotDrop publishes one article a day about the mathematics of casino games. Every house edge, expected value and simulation on the site is computed from published game rules — and where a figure comes from a model rather than a rulebook, the model is published with it.

The byline

Sam Corrigan is a pen name.

Saying so is the point. A named author who can be held to the numbers is what makes a claim checkable; hiding behind a company name is what makes it unaccountable. This site is written by one person under a consistent name, reachable at contact@slotdropapp.com, and every correction is made publicly.

What that means

The same person writes and checks every article on the site.
Corrections are made on the page, not quietly removed.
An email about a wrong figure gets an answer, whoever sends it.
No article is written or reviewed by an operator or an affiliate.

What it doesn't mean

Nobody here is a licensed financial or legal adviser.
None of this is a system, a tip, or a way to beat a house edge.
No figure on this site predicts what will happen to you tonight.
Being right about the maths is not the same as being lucky.

Method

Where the numbers come from.

In this order of preference. If a figure cannot be produced by one of the first two, it is labelled as a model.

1Published game rulesHouse edges are derived from the paytable and the rules of the game as the operator publishes them. Where two paytables exist, both are shown — the name of a bet tells you nothing, the paytable tells you everything.

2Exact arithmeticWhere a closed form exists, it is used and named. Gambler's ruin comes from Feller. Session expectations come from Wald's identity. The formula is stated so it can be checked without trusting us.

3Simulation, with the codeWhere no closed form exists, the figure comes from a Monte Carlo simulation with a fixed seed, and the script is published alongside the article. Re-running it produces the same table.

4Reported figures, marked as suchIndustry numbers we cannot reproduce are attributed and, where sources disagree, the disagreement is reported instead of a single figure being chosen.

Corrections

Found a wrong number?

It is the most useful thing you can send. Give the page and the source you compared it against — a rulebook, a paytable, your own simulation. If it holds up, the page is corrected and the correction is dated.

Report a figure Read the articles

Money

How the site is paid for.

Revenue

Affiliate commission when someone signs up through our link. Disclosed at the bottom of every page.
Donations in SOL, with no perks attached — see Donate.

Never

Paid rankings, sponsored reviews, or a fee to appear on the site.
A house edge, a rating or a recommendation changed by a commercial relationship.

Before anything else

This is a site about maths, not a reason to play.

Every game covered here has a negative expectation. Understanding one precisely does not make it profitable. If gambling has stopped being a choice, Safer Play lists free, confidential help — none of it run by a casino.