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US Master who won the US Open in 1948. In 1939, he wrote a book entitled White to Play and Win. After the publication, he played a tournament in Dallas where he lost all his games as White and won all his games as Black! In 1960, he was the author of a speculative line played

Cuban Grandmaster (1990). FIDE Trainer (2007). National coach. World U20 Champion 1986 and Cuban Champion in 1986 and 1990. Pan-American U20 Champion in 1986. Best results: Winner or shared first at Gausdal in 1986, Las Tunas 1987, Havana Capablanca Memorial 1990, Benasque 1991, Ubeda 1998, Aosta Open 2002, Toronto Open 2002, Zonal 2.3 in 2005,

Serbian Grandmaster (2000), FIDE Senior Trainer (2015). Serbian Champion in 1998 and 2015 and Vice-Champion of Yugoslavia in 2000. Best results: Winner at Kecskemet in 1991, Kavala Open in 1996, Jagodina GM in 1998,  Vrsac Open in 2000, Leposavic GM in 2003, Coffs Harbour and Gosford Open in 2004, Sydney Open in 2007, NSW Open

Turkmenistan Grandmaster (2005). FIDE Arbiter (2014) .Tukmenistan Champion in 2001. Best results: Tver 2004, 1st ; Vladivostok 2005, 1st; Vladivostok Winter 2005, 1st; Alushta GM in 2005, 1st; Zudov Memorial in 2005, 1st. A participant in the Olympiads from 1992 until 2000. Best ELO: 2503 in 2001.  

First Jamaican-American Grandmaster (1999). Coach and organizer. He was second at the Marshall Chess Club Popular Championship in 1993 and second at the Manhattan GM in 1999. Professional coach with his own online university, he is also an appreciated writer and a commentator. In 1996 and 1997, he commented the two matches between world champion

Filipino chess amateur. International Arbiter (1978) and International Organizer (1998).  FIDE General Secretary 1988-90, Permanent Secretary 1990-1994 and Executive Director 1994-98. FIDE Rating Administrator between 1987 and 2010. Asian Chess Federation Vice President 2006-2014. Executive Director of Asian Chess Federation Executive Director 2014. FIDE Constitutional Committee member since 2010. Olympiad Director of the Manila Olympiads

Latvian Grandmaster. Latvian Champion in 1991 and 2006. Best results: won or shared first at Schoenek 1996, Gonfreville 1999, Golden Cleopatra 2000, Winterthur 2001, Geneva Open 2002. Gausdal Classic, Bogny sur Meuse and Bossum 2003, Seefeld and Bergen Open 2004, Nordea Cup and Porto Carras Open in 2005, Otto Ibenfeldt Memorial 2006, Heart of Finland

West German International Master (1950). German Champion in 1929 and a participant in the Olympiad in 1930, 1931 and 1936. He won the Berlin championship in 1910, Duisburg in 1929, and finished second at Venice in 1929 and Stuttgart in 1947. Historical ELO: 2490.

German Grandmaster (2008) born in Russia. Best results: Cheliabinsk 1989, 1st; Hlohovec Open 1994, 2nd; Kranodar 2001, 2nd; Berlin Open 2002, 2nd-5th; Berlin Championship 2003, 2004 and 2007, 1st; Berlin Lichtentrade Open 2005, 1st; German Championship 2006, 4th-6th. Best ELO: 2519 in 2004.

Latvian Grandmaster (2005). Best results: Latvian Championship 2002, 1st-3rd; Rhode Open (FRA), 1st; Youth Masters Open Lausanne 2003, 1st; St. Affrique Open (FRA), 1st; Herbst Open (GER) 2004, 1st; Martigny Open 2005, 1st; Condom (FRA) Open 2005, 1st; Lodi (ITA) Open 2005, 1st; Citta di Assisi Open 2008, 1st; Citta di Olbia Open 2008, 1st;