Alex Lenderman is a Russian-American chess player who won the U16 (under 16 years old) division of the 2005 World Youth Chess Championship, Belfort, France, July 18-29, with a score of 9/10 (+8 =2 -0). He holds a title of Grandmaster. On the July 2009 FIDE rating list, he held an Elo rating of 2504, ranking him 736th in the world and 28th in the United States.

Alex Lenderman earned three Grandmaster norms in quick succession in the summer of 2009:

• Lenderman earned his first Grandmaster norm at the Copper State International tournament in Mesa AZ, May 29 to June 3, 2009.
• A second GM norm was earned at the Philadelphia International Tournament, June 25-29, 2009.
• Lenderman earned his third GM norm on July 5, 2009 at the World Open in Philadelphia.

Alex Lenderman attended Edward R. Murrow High School in Brooklyn where, from 2004-2007, he was part of the "dream team" winning four straight national high school titles for the school, along with now IM Salvijus Bercys. He played an important role in the book The Kings of New York, by Gotham Press, 2007.

Lenderman was the first American to win a gold medal at the World Youth Chess Championship since Tal Shaked became World Junior Champion in 1997. This gave him the title of World Champion Under 16 (years old). His USCF rating as of June 2009 is 2631. Alex plays on the Internet Chess Club under the handle 'manest' and gives free simuls periodically. In 2009, he announced after completing his second year at Brooklyn College, he planned to end his studies there and become a professional chess player.

Alex finished first in the 2009 Atlantic Open, in front of several other GMs.

Lenderman was first in the 2008 USCF Grand Prix, scoring higher than all the grandmasters he competed against by playing and championing in smaller events, including WCL tournaments. He currently leads the 2009 USCF Grand Prix.