Eagle Farm trainer Chris Anderson believes fillies and mares stakes events are the most difficult black-type races to win in Queensland.

Anderson has Epic Girl, who is chasing three wins in a row, in the Listed Spirit of Boom Classic at Doomben on Saturday.

Epic Girl won her two starts before a spell and has also won an open trial since returning.

She is unbeaten second-up and while she has some handy first-up form, would normally have missed Saturday's race.

"It is a bit of a problem for us because normally we would be first-up at 1000 metres and then head to 1200 which is her pet distance second-up," Anderson said.

"But we are like everyone else chasing black-type whether a win, a placing or even a fourth. It is no secret any black-type is valuable for a mare or filly.

"So we will all be there on Saturday with the same aim. And it isn't just Queensland trainers as Saturday's race has a good smattering of Sydney horses.

"Obviously our Group races are hard to win but if you look at the results over the years the fillies and mares races are very tough.

"For starters the fields are usually maximum numbers meaning luck always plays a part."

While admitting it will be hard, Anderson is confident Epic Girl has a strong chance.

"The trial was good, she has barrier three, her form has been good and she has a nice weight," Anderson said.

"But I won't get excited until her number is semaphored."