Keep a short reference
For any game, record its full title, studio, source and the question you are checking. Add the rule that answers it. A note with a clear source is more useful than a collection of copied feature names.
Use these guides to solve one question at a time: what the rules say, how a feature works, or whether you have found the right version.
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A useful rule check starts with the exact game version and ends with a short, sourced explanation of what qualifies, what pays, and when a feature stops.

A practical explanation of connected groups, size bands, multipliers and cascade totals, using clearly labeled fictional arithmetic and named game references.

A scatter-symbol guide with real trigger and payout examples, a comparison of base-game and bonus conditions, and a method for reading separate awards.
For any game, record its full title, studio, source and the question you are checking. Add the rule that answers it. A note with a clear source is more useful than a collection of copied feature names.