It's a challenge...Unbeaten Black Caviar must reset the history books if she's to win the $1m Grp 1 Newmarket Handicap (1200m) at Flemington on Mar 12. The mighty mare has been handicapped on 58kgs as she chases her 10th successive win. The only mare to win the Newmarket as topweight was Maybe Mahal with 56.5kgs in 1978, whilst Shaftesbury Avenue (58kgs, 1991) is the only winner in the last 50 years to carry 58kgs or more. The only mare to win with more than 58kgs was Pendant who carried 9st 7lb

It's a challenge...Unbeaten Black Caviar must reset the history books if she's to win the $1m Grp 1 Newmarket Handicap (1200m) at Flemington on Mar 12. The mighty mare has been handicapped on 58kgs as she chases her 10th successive win. The only mare to win the Newmarket as topweight was Maybe Mahal with 56.5kgs in 1978, whilst Shaftesbury Avenue (58kgs, 1991) is the only winner in the last 50 years to carry 58kgs or more. The only mare to win with more than 58kgs was Pendant who carried 9st 7lb (60.5kgs) when she won the Newmarket in 1906.

Racing Victoria Senior Handicapper Neil Jennings says: 'Black Caviar was rated the World Champion sprinter in 2010 and she demonstrated that she has improved further when she resumed with a totally dominant performance in the Lightning Stakes at Flemington on 19 February...That was her second consecutive Group 1 victory and on each occasion she has defeated many of her rivals in the Newmarket Handicap by significant margins which had to be considered when determining the handicaps...In the Lightning Stakes she was eased down to defeat Hay List by three-and-a-quarter lengths under weight-for-age conditions. Hay List receives a 3.5kg turnaround in weights for the Newmarket as a result and will carry 56.5kg...Similarly she defeated three-year-old Star Witness by four lengths in the Group 1 Patinack Farm Classic at her previous start in the spring under weight-for-age conditions. With 58kg in the Newmarket, Black Caviar will carry 1.5kg over weight-for-age, while Star Witness with 53kg is set to carry 3kg less than weight-for-age for a three-year-old.'

The minimum weights that can be assigned to horses in the Newmarket Handicap are 52kgs for four-year-olds and older and 50kgs for three-year-olds. Final acceptances for the Newmarket Handicap will be taken at 10am (AEST) on Wednesday, March 9.