Sami Lehtonen

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Sami Lehtonen

Writer: game mathematics

Sami Lehtonen writes for the Blackfin Casino blog on game mathematics: return to player, volatility, stake sizing and how to calculate bonus terms. The arithmetic is written out.

2 articles in the Blackfin Casino blog

3 languages the articles are published in

8 articles in the blog in total

Topics

Return to player (RTP) Volatility House edge Stake sizing Calculating a wagering requirement Bonus terms Expected value Table game rules

About Sami

Sami Lehtonen writes for the Blackfin Casino blog on game mathematics.

Return to player, volatility, hit frequency and the house edge are explained in the same terms the game info panels use.

The arithmetic is written out so a reader can repeat it with their own figures.

Betting systems are not recommended, because they do not change the expected value; the texts show why.

Bonus terms are covered from the wagering requirement to the win cap, with a worked example.

The texts promise no wins and quote no return percentages that cannot be derived from public figures.

How the articles are written

Writes on return to player, volatility and stake sizing.
Writes the arithmetic out so readers can repeat it.
Recommends no betting systems and makes no promises of return.

"If a number cannot be checked, it is not a number but an advertisement." – Sami Lehtonen

Sami’s articles

2 Articles

April 1, 2026

Polar night and volatility: what a long session costs

Two games can return the same and still feel completely different. Volatility, stake sizing, and why a doubling system does not work.

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April 29, 2026

Secret strategies: why there are none, and what you adjust

A secret system cannot exist. What can be calculated is the budget, the stake, the length of a session and the wagering requirement of a bonus.

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Frequently asked

What does Sami Lehtonen write about?
Game mathematics: return to player, volatility, stake sizing and calculating bonus terms.

Do the articles recommend betting systems?
No. Systems do not change the expected value, and the texts show the arithmetic for why.

Where can I find all of Sami Lehtonen’s articles?
All of his articles are listed further down this page.

Can the calculations be checked?
Yes. The figures are public: return to player is in the game info panel and the wagering requirement is in the bonus terms.

Does Sami write on other subjects?
Culture is covered by Ville Korhonen and breaks by Elina Järvinen.

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