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Benchmark

Against the people who price the same matches

Every book here is scored on the fixtures it priced, and the model is scored on that same subset. The prices are the ones those firms actually showed; the probabilities are those prices with the overround removed by the power method. Nothing is refitted to make this table look better.

The close is the harder benchmark; the open is the price a desk could actually have taken.
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Where the books disagree with each other

When the best price on every outcome implies less than one between them, a split stake returns the same amount whoever wins. It is arithmetic rather than a forecast, which makes it the only edge on this page that cannot be wrong about a match.

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Rules, against the only control that matters

Not betting is in the table. A rule that cannot beat it is a way of losing money slowly, and most rules are.

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