Big Buck\'s raced to a record 17th straight win on Thursday with victory in the Liverpool Hurdle at Aintree, a performance which prompted jockey Ruby Walsh to describe the horse as \"incredible\". Big Buck\'s run started at Cheltenham on New Year\'s Day in 2009 and he came to the Grand National meeting here having set another record when winning the World Hurdle at Cheltenham for the fourth time last month. \"The easy part is riding him. He\'s an incredible horse. He\'s skated in today,\" said Walsh. The nine-year-old, trained by Paul Nicholls, broke the mark set by Sir Ken in the 1950s on the opening day of the Grand National meeting. Walsh\'s 2-9 favourite who won by nine lengths.