Given the question: Information: - The Bulgarian Chess Championship is an event inaugurated in 1933 to crown the best chess player in Bulgaria. The championship has been held on a nearly annual basis since, with only a few years missed. In recent years some of the very best Bulgarian players have not participated in the championship, including former World Champions Veselin Topalov and Antoaneta Stefanova. - Antoaneta Stefanova (born 19 April 1979) is a Bulgarian chess grandmaster and a former Women's World Champion. - A board game is a tabletop game that involves counters or moved or placed on a pre-marked surface or "board", according to a set of rules. Some games are based on pure strategy, but many contain an element of chance; and some are purely chance, with no element of skill. - Chess is a two-player strategy board game played on a chessboard, a checkered gameboard with 64squares arranged in an eight-by-eight grid. Chess is played by millions of people worldwide, both amateurs and professionals. - A chessboard is the type of checkerboard used in the classic board game chess, and consists of 64 squares (eight rows and eight columns) and 32 pieces. The squares are arranged in two alternating colors (light and dark). Wooden boards may use naturally light and dark brown woods, while plastic and vinyl boards often use brown or green for the dark squares and shades such as buff or cream for the light squares. Materials vary widely; while wooden boards are generally used in high-level games; vinyl, plastic, and cardboard are common for low-level and informal play. Decorative glass and marble boards are available but rarely accepted for games rated by national or international chess federations. Each square on the board has a name from a1 to h8. - Aleksander Delchev ( Bulgarian : ; born 15 July 1971 ) is a Bulgarian chess grandmaster and chess author . He won the Bulgarian Chess Championship in 1994 , 1996 and 2001 . He played for the Bulgarian national team in the Chess Olympiads of 1994 , 2000 , 2002 , 2004 , 2006 , 2008 , 2010 and 2012 with a performance of 64.6 % ( +36 = 34 - 12 ) . Selected tournament victories include the European Junior Chess Championship ( 1991 -- 1992 ) , the 47th Reggio Emilia chess tournament ( 2004 -- 2005 ) , the 4th Open Master at the Sixth International Chess Festival in Benidorm ( 2007 ) , the International Open Championship of Croatia ( 2007 ) and the Open International Bavarian Chess Championship in Bad Wiessee ( 2005 and 2013 ) . In 2011 he tied for 2nd - 7th with Julio Granda , Ivan Sari , Pablo Almagro Llamas , Maxim Turov and Mihail Marin at the 31st Villa de Benasque Open . - Veselin Aleksandrov Topalov (pronounced born 15 March 1975) is a Bulgarian chess grandmaster and former FIDE World Chess Champion. Given the paragraphs above, decide what entity has the relation 'occupation' with 'chess player'.
The answer is:
aleksander delchev