The points system used in the Hong Kong and Kowloon Inter-School Swimming Championships can baffle even the best of mathematicians. Girls from the Canadian International School of Hong Kong (CISHK) last year struggled to fathom how they failed to win the Division Three (Hong Kong) Grade B title when they qualified for five finals, and won four of them. Rosaryhill School took the award without managing a victory in any final. But that was the past, and starting with today's heats, the CISHK can take aim at the Grade B title once again, and with their team maturing, contend for the Grade A prize as well. Janice Town Ka-wai was the CISHK star last year as she won both the Grade B 50 metres and 100m breaststroke finals and anchored the team to first place in the 4x50m freestyle relay. More of the same is expected from her this year. In Grade A, CISHK will look to Clara Wong, winner of the Grade B 50m freestyle final last year. French International School (FIS) won the girls' Grade C last year - and will be looking to build on that. They have Annabelle Ausset, a 100m breaststroke winner last time, and Elisabeth Goodman, who won the 50m backstroke and came second in the 100m freestyle final. The two were also members of the winning FIS 4x50m medley relay team. Other girls' schools expected to be among the points are Ying Wa, St Stephen's College, Sacred Heart Canossian College, and last year's Grade A winners St Clare's. In the boys' section, SKH Tang Shiu Kin Secondary School (SKHTSK) look the team to beat. They won both the Grade A and B titles last year but were edged out for the overall prize and promotion by German Swiss International School (GSIS). GSIS placed either first or second in 12 out of the 30 finals, and their absence, especially in Grade C where they dominated, will be welcome. SKHTSK have Cheung Siu-laam to win them points in Grade B events - he took the 200m medley and 50m butterfly last year. In Grade A, they will look to Cheung Tsz-hang, a winner in the 50m and 100m backstroke last year.In Grade B, Wong Tat-hung can win points for Aberdeen Baptist Lui Ming Choi College. Last year he won freestyle and backstroke races in Grade C. If they have kept much of last year's Grade B team together, a dark horse for that title this year could be CNC Lau Wing Sang Secondary School. Their swimmers featured in six Grade B finals last year. Following today's heats, the Division Three (Hong Kong) finals will be held on October 24. The Division One finals are this Wednesday.