Ruler Dominates Chester Vase Ruler Of The World ran out a facile winner to secure the MBNA Chester Vase for Aidan O'Brien for the fourth time in seven years. The Curragh maiden winner was fitted with cheekpieces for this second racecourse outing as he stepped up to Group Three company but showed no unwelcome traits en route to a straightforward success. Settled in a close second by Ryan Moore, he tracked leader Mister Impatience until the quartet started turning for home when the Galileo colt was asked to go and win his race. He settled the issue in a matter of strides with a six length winning margin scant reflection of his superiority. Mister Impatience held on for second with Havana Beat and Feel Like Dancing occupying the last two places throughout the 12 furlong contest. The winner was cut to 10/1 from 20s by Sky Bet to follow up in the Investec Derby at Epsom next month. Moore said: "He did it nicely. The race worked out well for him as he got a nice lead. He's still a bit green running round here, but once I grabbed hold of him he lengthened really well. He'll learn a lot. Going round here will have done him good."