HONG Kong jockey Jackie Tse covered himself in glory with his winning ride on Danewin in the Group One A$400,000 Rosehill Guineas (2,000 metres) at Rosehill in Sydney yesterday. Tse, who had previously been subjected to some criticisms over his lack of vigour, rode an absolutely perfect race. His exhibition prompted respected commentator Johnny Tapp to declare 'Jackie, that's a 10-out-of-10 ride' as Danewin crossed the line. After being congratulated by other jockeys as the field was pulling up Tse - a popular character in Australia - returned to a rousing reception. He deserved every plaudit he received for his ride was faultless. Tse cleverly angled across from the number eight starting barrier to settle Danewin in fourth place just one-wide as the field thundered into the first turn. He then dropped on to the rail coming around the home turn and speared Danewin through on the inside on straightening up. Danewin then dashed clear and, over the concluding stages, able to comfortably hold the challenge of Canterbury Guineas winner Sharscay to score by a length-and-a-quarter. Gosford Guineas winner Turridu was third. Danewin, who paid A$4.50 for A$1 on the New South Wales tote, is now nominal favourite for the A$1 million AJC Australian Derby (2,400 metres) at Randwick on April 15. A victory in the Derby will ensure him of selection as the best three-year-old in Australia and New Zealand in the 1994-95 racing season. However, there seems little chance of Australia's champion racehorse Mahogany ever again winning a title. Sent out favourite in the Group One A$350,000 George Ryder Stakes (1,500 metres), Mahogany finished an ordinary fifth in the event after being given every possible chance by Mick Dittman. The event went to Victorian Hareeba, who led throughout to record a courageous victory from March Hare and Brave Warrior.