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Betlori editorial author

Iris Halvorsen

Iris gives Betlori readers the numbers behind the games — house edge by bet, the cost of rule variations, and the arithmetic of progressive jackpots.

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Author profile

Game mathematics and table rules analyst

Iris Halvorsen writes about the mathematics underneath casino games for Betlori. Her articles take apart the figures a player is usually asked to accept without checking — the house edge attached to a specific bet, the effect of a single rule change on that edge, the real cost of a progressive jackpot contribution. She is interested in rare and regional games because they show how much the same familiar game can vary once you read the rule board rather than the sign above the table.

Iris gives Betlori readers the numbers behind the games — house edge by bet, the cost of rule variations, and the arithmetic of progressive jackpots.

Total articles 2 published guides
Profile updated 2026 Betlori

Editorial focus

Her editorial focus is arithmetic that changes decisions: which bet on a layout is worth taking, why two identical-looking roulette tables can differ by a factor of two, and when a jackpot is worth chasing.

How the author works

Iris starts from published rule sets and payout tables, works out the edge for each bet separately, checks the result against independent sources, and states plainly where a figure depends on rules the operator has not published.

Coverage on Betlori

On Betlori, Iris covers progressive jackpots, rare table-game variants, the legal categories casinos fall into, and how to read a house edge before staking money on an unfamiliar game.

Expertise

  • House edge by bet and the effect of rule variations
  • Progressive jackpot mechanics and contribution costs
  • Rare table games and regional casino categories

Latest articles

On Betlori, Iris covers progressive jackpots, rare table-game variants, the legal categories casinos fall into, and how to read a house edge before staking money on an unfamiliar game.

2 Total articles
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