PATRICK Biancone has won the Prix de l'Arc de Triomphe twice along with another 28 Group One races all over Europe but it will be a very significant triumph for him if Helene Star wins today's $3.5 million International Bowl. Frenchman Biancone acknowledged it would be a stern test for his Hongkong Derby winner, saying: ''We will certainly know for sure if Helene Star is really a good horse after today. I can say that his races mostly up to here have been well selected for himand he has maybe managed to miss some of the best horses. ''But in the Bowl he will have to show us just how good he is.'' The horse has chalked up five wins, culminating in the Derby but, at the end of all those races, just what has he actually beaten? While Helene Star was mopping up, at times, moderate opposition, tried and tested stablemate Quicken Away - still a fragile hope today - was taking on the very best. That Helene Star is a good horse cannot be in question. You can only beat what is put up against you and Helene Star has done that staggeringly well. In a 1993 Derby where virtually nothing in the field - with the notable exception of Northern Fire Ball - actually stayed the 1,800-metre trip, Helene Star, handled in good style by Eric Legrix, virtually stole the race. Up on the pace, he sped to the front soon after straightening and that ensured there were few serious challenges. But the margin of victory was a fast-diminishing half length to Red Ruffian and he would be few people's idea of a top Derby horse. However, all this could work in Helene Star's favour today now that he is dropped back to 1,400 metres. Gerald Mosse is back aboard Helene Star while champion jockey Basil Marcus has the ride on Quicken Away, for so long the crowd favourite at Sha Tin. The South African has declared himself pleased with the way Quicken Away has gone through his final preparations for the Bowl. While Hongkong hopes of home success are very high in the International Cup, the strength of the overseas challenge for the Bowl is considerable. Local ace Tony Cruz will ride Cardmania who comes into the race with very impressive credentials. Cardmania has also looked particularly good in her morning workouts and Cruz has declared himself completely happy with the American challenger. The horse previously raced in France and has travelled well, which makes him a very serious threat for winning honours. Irish challenger Diamonds Galore makes enormous appeal as he has arguably travelled the best of all the overseas contenders. He has gone about his early morning business at Sha Tin with zest and looks very relaxed - as he should be with his background. He has been up around good races and good tracks for a long time. There is top English and European Group One form all around Diamonds Galore. The Australian challenger Zaparri is no slouch. He has reeled off a string of victories - not always at top tracks - but in the manner of a very good horse. He is the pride of the string of Steve McKinnon who has worked overtime to have the horse ready. He looks a good quinella or tierce chance. English challenger Thourios looks a picture in the morning and could easily win the Best Turned Out award before the Bowl. If he puts everything into the race then the Guy Harwood-trained galloper could be the surprise package. Certain to lead them a merry dance for long enough will be the Willie Shoemaker-trained flier Glen Kate, to be ridden by Corey Black, who had no luck in the race last year. The Bowl does look to be a most intriguing race but it would be the wiles of Weld rather than the panache of Patrick that carries the day. Diamonds Galore looks set to shine.