this performance, her rating rose back to 2583. After the tournament, however, her rating fell back into the mid-2500s and would not reach 2570 again until 2017 three years later. Although her performance in classical chess was in the midst of a mild decline, Muzychuk had a major result in fast chess, winning the Women's World Blitz Championship in April. She won the tournament by a wide margin, finishing with 23/30, 2½ points ahead of Dzagnidze in second place. The championship brought her blitz rating to a career-best 2665. She had also finished in joint third place at the preceding Women's World Rapid Championship event. The World Blitz victory was her last major triumph with Slovenia. In May 2014, Muzychuk switched federations again back to her home country of Ukraine. She stated that her sister continuing to play for Ukraine as well as the new federation president Viktor Kapustin as reasons for her return. At the end of the year, she entered the Ukrainian women's national championship for the first time since she was the 2003 champion and again won the tournament. Muzychuk was less active in 2015. One of her highlights of the year was the Women's World Championship, where she had her best result to date. As the third seed, she reached the quarterfinals. She knocked out 62nd seed Amina Mezioud, 30th seed Aleksandra Goryachkina, and 19th seed Lela Javakhishvili without any tiebreaks before being upset by 11th seed Pia Cramling in the second set of rapid tiebreaks. The tournament was ultimately won by her sister Mariya, whom she stayed to support. Early in 2016, Muzychuk won the women's first prize at the Gibraltar Chess Festival with a score of 7/10, corresponding to a performance rating of 2677. During the tournament, she defeated two Grandmasters rated above 2600, Salem Saleh and Laurent Fressinet, the latter of whom was rated 2700 and is the only player she has defeated in a rated classical game with a rating of at least 2700. At the end of 2016, Muzychuk won both the Women's World Rapid Championship and the Women's World Blitz Championship in Doha, thereby also defending the latter of these two titles from 2014. She became the third player to win both events in the same year after Susan Polgar in 1992 and Magnus Carlsen in 2014. She won the rapid event by a full point over Aleksandra Kosteniuk and