She finished on an amazing 9 under par - 9shots ahead of fellow Korean Inbee Park who finished second on par, followed closely by American poster girl Paula Creamer and +1 and Japanese Mika Miyazato on +2.
The highest placed British finisher was 2009 champion Catriona Matthew from Scotland who came joint 10th on +7.
For a full list of scores, click here: http://sports.yahoo.com/golf/lpga/leaderboard
To find out more about the Ricoh Womens British Open, look here: www.ricohwomensbritishopen.com
The 2013 championship will be played at St Andrews from 1st to 4th August 2013
