Fascinating Rock produced a stylish effort to take the P.W. McGrath Memorial Ballysax Stakes at Navan.
The renowned Derby trial saw an interesting field assembled, with Stirabout taking them along before All Set To Go edged to the front at the three-furlong marker.
Andrew Oliver's charge still held a narrow advantage a quarter of a mile from home, but the Dermot Weld-trained Fascinating Rock (5-2) was moving very powerfully in the hands of Pat Smullen and put matters to bed once assuming control in the final furlong, holding the running-on 7-4 favourite Answered by two and a half lengths.
The winner was added to the Investec Derby field at a cost of £8,000 this week, and Kris Weld, son of the winning trainer, said: "He did it very well. It came up quite quickly after he won nicely at Leopardstown a couple of weeks ago, but it was the obvious race to come for and it's lovely to win it again.
"He travelled very well and looked the way a winner a long way from home. There's no immediate plans for him, but he's had two quick runs so he'll have a break and we'll freshen him up.
"He was entered in the Derby during the week but we'll take it one step at a time with him and he's a lovely horse for the future. He's a big powerful horse and you'd like to think there's more improvement in him as he fills into his frame. Better ground shouldn't be a problem."