Based on the rankings and the information provided, my best guess for the winner would be Silver Knott, as it has the highest total rating of 618.5 and is ranked first. The main dangers for Silver Knott would be:

1. Auguste Rodin (ranked 2nd, total rating 617.1)
2. Chaldean (ranked 3rd, total rating 584.1)
3. Noble Style (ranked 4th, total rating 564.2)

These four horses have the highest total ratings, and as an average of 65% of winners are in the top four they are a good starting point. However, it’s important to consider other factors that may have been overlooked by the rankings. For example, Little Big Bear (ranked 5th, total rating 542.2) has impressive past performances and potential, but has concerns regarding settling. Another horse to keep an eye on is Sakheer (ranked 7th, total rating 512.1), who has displayed an exciting potential to stay further, despite being unproven at longer distances.

In summary, my best guess for the winner is Silver Knott, with main dangers being Auguste Rodin, Chaldean, and Noble Style. It’s also wise to consider horses like Little Big Bear and Sakheer, who might have been slightly overlooked by the rankings.