Articles: General topics

General topics

04 October 2026 · 3 min read

Season and Sample Window: Avoid Mixing Different Team Conditions

Why a season average and recent matches answer different questions, and how to compare periods without treating a short run as proof of a trend.

AI Sports Analytics General topics Intermediate

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General topics

04 October 2026 · 3 min read

Missing Data or Zero: How to Tell Them Apart in Sports Statistics

Zero means an observed absence of an event; a missing value means no value is available. See how the distinction changes averages, rates and market interpretation.

AI Sports Analytics General topics Beginner

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General topics

04 October 2026 · 3 min read

Future Data Leakage in Betting Backtests: How to Detect It

Check that a backtest uses only information available before a decision, and see why randomly shuffling matches can overstate performance.

AI Sports Analytics General topics Advanced

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General topics

04 October 2026 · 3 min read

Survivorship Bias in Betting Records: Who Is Missing from a Winning Sample

Why visible or surviving wins cannot replace a complete decision log, and how to restore the denominator for an honest performance review.

Bankroll & Mathematics General topics Intermediate

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General topics

04 October 2026 · 3 min read

Calibration and the Brier Score: How to Evaluate a Probability Forecast

The binary Brier-score formula, a worked calculation, reliability bins and why one average score is not enough to assess calibration.

AI Sports Analytics General topics Intermediate

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General topics

04 October 2026 · 3 min read

When Sports Statistics Disagree: Check Definitions, Periods and Updates

A step-by-step check of the event, metric definition, period, timestamp and source version when two summaries show different numbers.

AI Sports Analytics General topics Intermediate

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General topics

24 September 2026 · 3 min read

System Bet vs Accumulator: Count the Combinations

A three-selection 2-of-3 system shows how combination count, total stake, and a two-winner outcome compare with one accumulator.

Betting Basics General topics Intermediate

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General topics

24 September 2026 · 3 min read

Three-Way Overround: A Worked 1X2 Calculation

A worked three-outcome example converts decimal odds to implied probabilities and measures how far their sum sits above 100%.

Bankroll & Mathematics General topics Intermediate

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General topics

24 September 2026 · 3 min read

Fixed Stake vs Percentage of Bankroll: A Numerical Comparison

Compare a fixed unit with 2% of the remaining balance after a losing run, and see how the stake share changes under each method.

Bankroll & Mathematics General topics Intermediate

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General topics

24 September 2026 · 3 min read

Betting Hit Rate and Confidence Intervals: What 60% Does Not Tell You

A 60-from-100 example uses a Wilson interval to show sampling uncertainty and why hit rate is not the same as profitability.

Bankroll & Mathematics General topics Advanced

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General topics

23 September 2026 · 3 min read

Hockey Betting: Regulation Time or Including Overtime?

A hockey match-winner market and a regulation-time result can settle differently. Learn where a draw remains an outcome and which competition and market terms to check.

Betting Markets General topics Beginner

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