On September 12 at Churchill Downs, a two-year-old named Salahudin, who had never run anywhere but Ellis Park and never faced anything harder than an ungraded stakes, went to the gate as the 4-5 favorite in the Grade 3 Iroquois for a $300,000 purse. Class is the level of competition a race is written for, and handicapping it means judging whether today's field is tougher or softer than the fields a horse has already beaten.

That judgment sits under nearly every bet you will make on the Derby trail. Each prep is a rung, and each horse arrives from a different one. The Churchill Downs preview framed the Iroquois exactly that way: an unbeaten colt stepping from maiden and ungraded stakes company into graded stakes for the first time, with 10 Derby qualifying points to the winner.

The question a class read answers is narrow. It does not ask how fast a horse is. It asks who he beat, and whether today's horses are better.

The ladder, rung by rung

The conditions line printed atop each race in the program tells you which rung you are on. From the bottom, according to the West Point Thoroughbreds guide to the condition book and NYRA Bets' Handicapping 101:

  • Maiden claiming. Horses that have never won, any of which can be bought for the listed price.
  • Maiden special weight. Also for non-winners, but the horses are protected from being claimed, which makes it the stronger maiden race.
  • Claiming. Winners that can be bought at the posted price. Claiming and maiden claiming races make up roughly 70% of North American racing.
  • Starter allowance. For horses that have started for a designated claiming price but cannot be claimed today.
  • Allowance. Non-claiming races climbing through "other than" conditions, each one tougher than the last.
  • Optional claiming. Allowance conditions with a claiming option, so seasoned horses that have used up their conditions can find a level.
  • Stakes. Overnight stakes, typically under $100,000, then Listed, Grade 3, Grade 2 and Grade 1.

The price and the purse are only the first read, because the same number can hide very different races. Equibase points to the restriction codes attached to claiming races: "open" admits anyone, "n2y" and "n1y" limit entry to horses that have not won in roughly six to twelve months, "n2x" to horses that have not won two at that level, and "n2L" or "n3L" to horses with few lifetime wins. A $50,000 open claimer is typically tougher than a $50,000 restricted one, and a race confined to state-breds is softer again. TwinSpires Edge puts numbers on the drift: a $25,000 claiming race might rate about 85 one week, 80 with a weak field and 90 with a strong one.

Three horses from one Iroquois

The Iroquois field is a useful classroom because nine horses arrived from nine different kinds of form, and the official study guide laid out every rung.

Bearamour is the warning. He won a maiden special weight by 7.5 lengths, the kind of margin that looks like a horse too good for his company, and then tired to a distant third in the Ellis Park Juvenile, one modest step up. A wide win at a low level tells you he outclassed that field. It tells you nothing yet about the next one.

He Is No Lie was the quiet exception. After a maiden win he ran second in the Bashford Manor and fourth in the Grade 3 Best Pal, which made him one of the few in the field who had already seen graded company. He finished second, beaten a half-length.

Salahudin made the leap and made it look possible for the wrong reasons. TDN's recap has him breaking slowly, sitting sixth behind a :22.85 opening quarter and circling four wide before winning in 1:36.54. Winning a class rise through a bad trip is a stronger signal than winning it through a good one, though how much the early pace helped him is a separate question, one the pace collapse goes into.

Not the purse, not the figure

Two things pass for class and are not. On that same Churchill card, The Pressbox reported Salahudin's Brisnet rating as 96 while Coach Pope earned a 99 winning a maiden special weight. The maiden ran the bigger number and faced the weaker field.

Often mistaken for class What it measures Why it is not the same
Speed figure How fast a horse ran that day A maiden can out-figure stakes winners without having beaten anyone good
Purse What the race pays Equibase notes a restricted race can carry a higher purse and still be the softer spot

Reading a drop

The drop is where the class read earns its keep, and where it goes wrong most often. NYRA Bets frames it as a fork: a horse dropping in class may get relief, or the drop may mean the horse is no longer competitive at the old level. The Retired Racehorse Project adds that a horse dropped again and again through lower claiming levels is often nearing the end of its career. When the drop comes after a layoff, the same fork applies with less to go on, and the sources here say nothing firmer about which way it usually breaks.

So check three things before you trust a drop. Compare the conditions line, restriction codes included, against the last three races, not just the claiming price. Look for a horse that hit the board in open company and now drops into a restricted race, which is the Equibase angle. And be wary of a horse falling rung after rung with no sign of form in between.

For the full method, Equibase names Steve Davidowitz's Betting Thoroughbreds as the foundational book on the class ladder, and it remains the one to read. The handicapping basics sit class alongside speed and form.

Salahudin, meanwhile, is one rung further up with more to climb. Baffert called him "a true mile-and-a-quarter kind of horse," and the next time he is entered the question will be the same one it was in September, asked of a harder field.