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    Kelly Criterion

    Mathematical formula for optimal bet sizing.

    Full Explanation

    The Kelly Criterion calculates the optimal percentage of your bankroll to wager. Formula: f = (bp - q) / b, where b = decimal odds - 1, p = probability of winning, q = probability of losing. Most experienced bettors use fractional Kelly (quarter or half) to reduce variance.

    💡 Example

    Odds 2.00 (b=1), Win prob 55% (p=0.55): Kelly = (1×0.55 - 0.45)/1 = 10% of bankroll.

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    Sarah van der Berg

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