Feliks Zemdegs
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Feliks A. Zemdegs (/fɛliks/) (born 20 December 1995) is an Australian Rubik's Cube speedsolver.

His surname is Latvian, and his maternal grandparents are from Lithuania. Zemdegs bought his first speedcube in April 2008 inspired by speedcubing videos and tutorials on YouTube. The first unofficial time he recorded was an average of 19.73 seconds on 14 June 2008. He currently uses CFOP to solve the 3x3x3, the Yau method to solve the 4x4x4, the CLL method to solve the 2x2x2, and the Reduction method for 5x5x5 through 7x7x7.

Zemdegs won the 3x3x3 event at the first competition he attended, the New Zealand's Champs 2009 on 18 July 2009, with an average of 13.74 seconds in the final round. He also won 2x2x2, 4x4x4, 5x5x5, 3x3x3 blindfolded, and 3x3x3 one-handed.

At his next competition, the Melbourne Summer Open 2010 on 30 January 2010, Zemdegs set his first world records for 3x3x3 average and 4x4x4 average, with times of 9.21 seconds and 42.01 seconds respectively. He held the 3x3x3 average world record continuously from then until 23 April 2017, improving it 8 times, eventually to 6.45 seconds. The most world records he has ever held at one time was after a competition in Melbourne in May 2011, when he held all 12 records listed in the first 12 columns of the table below. As recently as 28 January 2017, he held 11 of those records concurrently.