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[ARTICLE · art-128643] src=aiflash.com ↗ pub= topic=machine-learning verified=true sentiment=· neutral

Horse racing as an ML ranking problem: 1.18M runners, walk-forward validation and a very strong market baseline [D]

A machine-learning practitioner built a horse-racing ranking model trained on 1.18 million runners and evaluated it with walk-forward validation, finding that the betting market remains a very strong baseline. The project, posted to a machine-learning forum, revisits the statistical modeling approach used by Bill Benter's team for Hong Kong racing. The author reports the market baseline proved difficult to beat.

read1 min views1 publishedSep 14, 2026

Hi 👋 long time lurker It’s been a few years since the last post about Horse Racing within this sub. A few years ago I was reading a popular science book and came across the story Bill Benter and the statistical models his team developed for Hong Kong racing. What stayed with me wasn’t simply the ide

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