Darwin given sprinting assignment Darwin is likely to revert to sprinting for his seasonal reappearance in the Weatherbys Ireland Greenlands Stakes at the Curragh on May 24. The Big Brown colt made a most impressive start to his Irish career at the Curragh last July and then claimed the significant scalp of Gordon Lord Byron in the Group Three Minstrel Stakes over seven furlongs. The step up to a mile proved beyond Aidan O'Brien's four-year-old when he was beaten on his final start of the year in the Solonaway Stakes and he will come back to six furlongs on Saturday week. "He'll probably go back in trip and that might work out as he has plenty of speed," said O'Brien. "He could be a very good sprinter and could start off in the Greenlands on Guineas weekend." One Ballydoyle inmate unlikely to be in action in the coming weeks is Kingsbarns. The Galileo colt looked a potential superstar when winning the Racing Post Trophy at Doncaster as a juvenile, but he made just two appearances in 2013 and was beaten at odds-on on his return at Leopardstown last month. O'Brien said: "We were hoping to go to Leopardstown then on to Newbury (for Lockinge) but it was bad ground and I shouldn't have run him. He'll be back in the autumn" Three-year-olds Carlo Bugatti and Giovanni Boldini have both fluffed their lines in the last week. Carlo Bugatti finished tailed off in the Chester Vase behind stable companion Orchestra, while Giovanni Boldini was seventh in Sunday's French 2000 Guineas. "Carlo Bugatti disappointed at Chester. I shouldn't have put the blinkers on and I'll leave them off next time. He wants fast ground and might go to Ascot," said O'Brien. "He (Giovanni Boldini) ran OK. The ground was too soft - he wants it fast. He wants to take his time over a mile."