Boyanka Kostova and Chen Yanqing, compared on every result on this site. Boyanka Kostova's best total is 252 kg (women's 58 kg, 2015); Chen Yanqing's is 244 kg (women's 58 kg, 2008). On the Sinclair scale, which allows for bodyweight, Boyanka Kostova is ahead by 10.1 points. They never met in the same class.
Sinclair score. The total scaled for bodyweight with the IWF's 2025 to 2028 coefficients, so lifters from different classes sit on one scale. Women and men have separate formulas.
Place in its class. Where the best total stands among every lifter with a total in that class on this site, on the IWF class list in force at the time.
Attempts made. The share of all snatch or clean and jerk attempts the lifter made. At senior World Championships and Olympic Games since 1998, lifters make 58% of snatches and 56% of clean and jerks.
Snatch as a share of clean and jerk. The snatch divided by the clean and jerk at the best total. It describes the shape of a lifter, not strength, so it is not in bold; eight in ten women lifting in national federation meets sit between 70% and 85%.
World records held now. Records on the IWF class list in force since 1 August 2026. A record set in a class that list retired does not carry over, so a past record holder can show none.
Head to head
Boyanka Kostova vs Chen Yanqing head to head
Boyanka Kostova and Chen Yanqing never lifted in the same class at the same competition. The results here run from 2009 to 2021 for Boyanka Kostova and 1998 to 2008 for Chen Yanqing, so the side by side figures and the chart are the comparison.
Careers
Boyanka Kostova and Chen Yanqing, competition by competition
The Sinclair score at each competition: the total scaled for bodyweight, so lifters from different classes sit on one scale. Competitions that ended without a total or a bodyweight have no point.
Boyanka Kostova
Chen Yanqing