Piste Noire, an unraced 3-year-old filly owned by Juddmonte Farms with a deep pedigree, sold for 340,000 guineas, or approximately $594,000, to top the third session of the Tattersalls December mare sale in England on Wednesday.\nPiste Noire, one of 30 mares owned by Juddmonte to go into the ring Wednesday, is a daughter of Diesis out of the Niniski mare Skiable and is a full sister to Three Valleys, a graded and group stakes-placed runner in the United States, England, and Ireland. Piste Noire's second dam, Kerali, is the producer of Hasili, the dam of five Group or Grade 1 winners, including champion Banks Hill.\nPiste Noire was purchased by Blandford Bloodstock.\nPiste Noire topped a day of selling that was less robust than the previous two days. All told, 161 fillies or mares were sold on the day for approximately $10.65 million. The average price was approximately $66,200, and the median was approximately $27,900.\nThrough three days of selling, 494 horses have been sold through the auction ring for gross receipts of approximately $56.4 million. The average price has been about $114,100, and the median approximately $34,900.\nThe final day of selling was scheduled for Thursday.