Kentucky Derby winner Genuine Risk worked five-eights of a mile in a swift 59 seconds this morning and completed her serious training for Saturday's Preakness.

"She was moving free, easy and smooth," said trainer LeRoy Jolley. "I thought she'd go in about a minute, but the track was fast.

With Jacinto Vasquez aboard, Genuine Risk went a quarter mile in 23 3/5 seconds and the half in :47 1/5. She was clocked in 1:12 1/5 for three-quarters of a mile as she pulled up.

The five-furlong workout Wednesday has become a Jolley trademark in Triple Crown events. On the Wednesday before the Derby, the filly had worked the distance in 1:02 2/5 over a deep, slow track.

This training pattern, Jolley said, "has been working pretty good. Once a horse reaches this point, they don't need too much in between races. This seems enough." He sounded confident that Genuine Risk has maintained her sharp condition since becoming the second filly in history to win the Derby.

A more revealing Preakness workout will take place Thursday morning, when trainer Charles Hadry sends Blue Ensign a half mile at Laurel.

On the day that Genuine Risk was winning the Derby, Blue Ensign captured the Woodlawn Stakes at Pimlico by nine lenghts in excellent time. It was a performance that certified him as a genuine Preakness contender, but Hadry wasn't happy with the way the colt looked after the race.

After watching him work at dawn Thursday, Hadry and owner Stuart Janney will have until 10 a.m. to decide whether to put up $10,000 and make Blue Ensign a supplementary nominee for the Preakness.

If their decision is affirmative, a total of nine horses are likely to be entered for the 105th running of the race. Besides Genuine Risk, the others are Jaklin Klugman, Coloniel Morgan, Codex, Samoyed, Knight Landing, Bing and Lucky Pluck.

The latter was the most recent addition to the Preakness lineup.The illbred gelding has won three of 26 career starts. In his most recent stakes appearance, he finished sixth in the unfamous Paul Revere Stakes at Suffolk Downs.