I'm a novice at horse racing but I enjoy it. I've played the game for awhile and have basically either ignored things I don't understand or looked them up. Hopefully I'm not the only one with the same questions.

I'm running the USA schedule but I assume (hope) things are the same with the other schedules.

1m1f (110y) The Preakness Stakes (C1) Grade 1 race (3yo) (Dirt)

Ok, got most of that except:

a) What is 110y?
b) I get that C1 means "Class 1" but does it just designate the kind of horse that races? The prize money? I see anything from C1 to C7 and don't really get the point of what "Class" means.

In Declarations, in the Current Declerations some horses will have a "C" next to their name, some a "D", some "CD", some "G". What do these stand for?

a) this means the trip will be 1 mile, 1 furlong and 110 yards. (basically the best part of 1m2f) the y stands for yards!

b) Class 1 is the highest class of race. (I'm not too good with US racing but I think it's the same as the UK in the game). A Class 1 race will be a group or listed race. C2 a top handicap and so on down. So if you have an 80 rated handicapper you would, in theory, have a better chance in a class 5 0-80(/90) race (I can't remember the exact class boundaries) than you would in a class 2 0-110 handicap, even though it might have a much lighter weight. The prize money also increases as you go up in class. C7 is the lowest class, sellers and claimers.

I think I'm right in saying that:
C= won on the course before,
D= won at the distance before,
G= won on the ground before.
So if you have a horse with CDG after it's name it has won on the course, over the distance and on the ground the race will be run on.

Thank you! That clears some stuff up.