|Romanized Name:||Cho Sung Choo|
|Birth:||July 28, 1997|
|WCS Rank (Points):||#7 (4675 points)|
2010-10-13 - Present
Cho "Maru" Sung Choo is a Terran player from South Korea, who is currently playing for Prime. He is well known for being the youngest GSL player of all time, winning his first televised game at the age of 13.
 Wings of Liberty
Maru made his professional debut in the very first GSL, the 2010 TG Sambo Intel Starcraft II Open Season 1. There, he defeated fan favorite Cella 2-1  to advance to the Ro32, where he lost 0-2 to San. The series against San would be Maru's last games in the GSL for almost a year; he did not qualify for Code A until GSL August, where he fell 0-2 to Fruitdealer in the Round of 32. Maru's attempts to qualify for GSL October and GSL November also failed, though the single game he took off of Curious during the October preliminaries was Curious's only loss that season.
2012 proved a much better year for Maru. He started out the year strong, qualifying for Code A in the 2012 GSL Season 1 preliminaries and defeating Noblesse and Yeah in the process. His first match in the Ro48 was a 2-0 win against favored opponent MorroW. Then, in the Ro32, he managed to beat Happy 2-1 before dropping to NaDa 2-0 in the Ro24. The loss sent him to the Up and Down matches, where he showed that he had the skill of a Code S player by defeating sC, Terius, Alicia, and JYP to earn a Code S spot.
Maru entered his first Code S tournament, 2012 GSL Season 2, in a group with GuMiho, Curious, and HerO. Despite low expectations, he defeated GuMiho and HerO to earn first in the group and move on to the Ro16. There, he defeated MC 2-1, but then lost to Squirtle 0-2 and Oz 1-2 to finish third in his group. He now faces Creator in the Ro24 of Code A.
 Outside Korea
Maru has played in one offline foreign tournament so far: the IPL 4 on April 6th, 2012. IGN awarded him a spot in the Open Bracket because his team, Prime, was playing in the GSTL finals, which were also hosted at IPL 4. Maru's performance was not especially strong, however; he only defeated CatZ and Illusion before falling 0-2 to TaeJa and 1-2 to Virus.
Maru competed in the online Asia Starcraft League from August 7th, 2012, to February 7th, 2013. He easily reached the bracket stage, going 4-1 in each of the group stages. In the winner's bracket, he defeated notable Chinese players F91 and MacSed 2-0 each in the second and third rounds of the bracket stage and defeated the Taiwanese player Sen 3-1 in the fourth round. He faced fellow Korean BboongBboong twice, in the semi-finals and the grand finals, defeating him 3-2 both times to win the tournament.
 Heart of the Swarm
Maru was able to qualify for WCS Korea 2013 Season 2 Premier League, hosted by OGN, through the Up and Down matches. He defeated sOs twice in the round of 32, and Trap and SuperNova 2-1 each in the round of 16 to reach the bracket stage of the tournament. After handily defeating perennial Code S/Premier League player Symbol, he was matched against the Season 1 Finals champion INnoVation. According to the Teamliquid Power Rank and Aligulac rating website, INnoVation was the best player in the world at the time, and was the heavy favorite in the matchup. However, by using highly varying, cheesy, and aggressive builds, Maru was able to take the first three games without difficulty, and took advantage of a shaken up INnoVation to close the series 4-0 in a fairly standard game. This brought him to the first finals of his career against Rain where after dropping the initial two games, Maru took the third game with a proxy 11/11 which gave him the momentum to end up winning the championship 4-2.
- Was described as an "Little teddy bear" by Lani during IGN ProLeague Season 4.
- Is the youngest Royal Roader in OSL history and the first eSF OSL champion.
- When Maru won his OSL title, he was the only remaining player from the 2010 GSL Open Season 1 still in Code S/Premier League.
|In Premier Tournaments|
|2013-12-6||3 - 4th||2013 Hot6ix Cup||1 : 3||Soulkey||$3,764|
|2013-11-09||3 - 4th||2013 WCS Global Finals||1 : 3||Jaedong||$17,500|
|2013-10-27||3 - 4th||2013 WCS Season 3||1 : 3||Dear||$10,000|
|2013-10-09||3 - 4th||2013 WCS Season 3 Korea GSL||1 : 3||Dear||$7,000|
|2013-08-10||1st||2013 WCS Season 2 Korea OSL||4 : 2||Rain||$20,000|
|In Major Tournaments|
|2013-09-27||3 - 4th||StarsWar League Season 3||2 : 3||HerO||$1,000|
|2013-02-07||1st||Asia Starcraft League||3 : 2||BboongBboong||$1,666|
|In Premier Team Leagues|
|2012-02-18||KSL Team League Season 1 Week 2||All Kill of StarTale|
|Complete Results in any Tournament|
|StarCraft II World Championship Series: South Korea Champion|
| 2012 Auction All-Kill OnGameNet Starleague
| 2013 WCS Season 2 Korea OSL
10 August 2013 - 19 October 2013
| 2013 WCS Season 1 Korea GSL
| 2013 WCS Season 3 Korea GSL|
- 2013-12-05 | 2013 Hot6ix Cup Ro8 Matches Winners by This Is Game at Hot6ix Cup (trans. )
- 2013-11-05 | WCS KR Representatives, Pre-Blizzcon by This Is Game (trans. )
- 2013-10-05 | 2013 WCS Korea Season 3 Premier League Ro8 Day 2 Winners by This Is Game (trans. )
- 2013-09-29 | 2013 WCS Korea Season 3 Premier League Ro16 Group D Winners by This Is Game (trans. )
- 2013-08-13 | 2013 WCS Korea Season 2 Premier League Grand Finals Winner by This Is Game
- 2013-07-31 | 2013 WCS Korea Season 2 Premier League Ro4 Winners by This Is Game
- 2013-07-26 | 2013 WCS Korea Season 2 Premier League Ro8 Winners by This Is Game
- 2013-07-05 | 2013 WCS Korea Season 2 Premier League Ro16 Day 2 Winners by Fomos.kr
- 2013-06-21 | 2013 WCS Korea Season 2 Premier League Ro32 Groups C and D Winners by This Is Game
- 2013-05-29 | 2013 WCS Korea Season 2 Up/Downs Group A Winners by This Is Game
- 2013-03-05 | 2013 GSL Season 2 Up/Downs Group C Winners by This Is Game
- 2013-02-06 | 2013 GSL Season 1 Code A Ro48 Day 2 Winners by This Is Game
- 2013-02-01 | 2013 GSL Season 1 Code A Qualifiers Day 2 Winners by This Is Game
- 2012-10-17 | 2012 GSL Season 4 Code A Ro24 Day 2 Winners by This Is Game
- 2012-10-09 | 2012 GSL Season 4 Code A Ro32 Day 1 Winners by This Is Game
- 2012-09-25 | 2012 GSL Season 4 Code A Ro48 Day 2 Winners by This Is Game
- 2012-04-08 | IGN Proleague Season 4 Interview by LilSusie and LaniBot of IPL LiveU at IPL4 (trans. )
- 2012-03-27 | 2012 GSL Season 2 Code S Ro32 Winners by This Is Game
- ↑ GSL 2012 Season 1 Up/Down Match Day 3 Recap
- ↑ GSL 2010 Open Season 1 Round of 64 Days 1-4 Recap
- ↑ GSL 2012 Open Season 1 Round of 64 Days 1-4 Recap
- ↑ GSL 2010 Open Season 1 Round of 32 Recap
- ↑ GSL 2012 Season 1 Code A Week Three Preview
- ↑ GSL 2012 Season 1 Up/Down Match Day 3 Recap
- ↑ GSL 2012 Season 2 Code S Day 2 Preview
- ↑ GSL 2012 Season 2 Code S Day 2 Liquibet
- ↑ GSL 2012 Season 2 Code S Day 2 Recap
- ↑ GSL 2012 Season 2 Code A Round of 24 Day 2 Preview
- ↑ KSL 2012 Season 1 TLPD: Maru's record
- ↑ SC2 Power Rank - July 2013 teamliquid.net. July 4th, 2013.
- ↑ Aligulac List 89 Aligulac.com. July 24th, 2013.
- ↑ Interview with Lani (begins 1:29:30)