Rule of Thumb for wagering at Keeneland

I'd go so far as to say its unplayable.
The 5 stakes races at Turfway park this past weekend contained qulaity animals with form, yet all 5 were won by longshots with little or next to little rational chance.
I didn't bet a quarter on that card, thank God. I simply cannot play this surface. It has no form, and many horses just refuse to run on it. Horses may like or dislike certain dirt surfaces more than others, but they don't jst refuse to try on them.
Stick to the grass, and to Belmont Park and Santa Anita would be an even better idea.