diagonal: Yudasin - The winner of <the inaugural edition at Pamplona Invitation Tournament> in December 1990 (9091), ahead of Viktor Korchnoi as sole second, and Zsuzsa (Susan) Polgar as clear third:
Pamplona 1990 was where Zsuzsa Polgar earned her final (male) GM norm to obtain the Grandmaster title by FIDE. Judit Polgar then missed a norm at same tournament. Pamplona always was a platform for young and rising players.
Yudasin (ranked as the world’s no.8= in January – June 1991), and Korchnoi were maybe also in training for their Candidate’s matches in the following January 1991 against Ivanchuk (a humiliating loss for Yudasin by 0.5-4.5) and Sax (4-4, Korchnoi at age of 60 advanced after rapid play-off), respectively.
A city of the north of Spain which has hosted 19 GM Tournaments (Magistral), held at end of Dec, or in Dec / Jan., mostly combined with an Open, already in 1985. The series lasted from 1990 to 2009 (no invitation tournament in 2000).
Due to financial problems the Magistral was no longer played in 2010 and the following years, but minor Opens were going on.
Top players participating but <not winning> at Ciudad Pamplona:
Korchnoi (2., 1990), Radjabov (2., 2001), Karjakin (2., 2004, 7., 2003), Zsuzsa Polgar (3., 1990, 3. 1991), Shirov (3., 2006), Topalov (4., 1994), Caruana (4., 2008), Kramnik (5., 1992 then already as top seed), Ljubojevic (6., 1995), Pia Cramling (6., 1996), Bacrot (6., 1997), Nakamura (6., 2003), Judit Polgar (7., 1990), Timman (7., 1999), Leko (8., 1993 as IM).
Yudasin won twice in a row!
List of winners: http://www.jemchess.com/Oberena08/O...
plus 19th and last edition in 2009 with a four-way-tie: Meier (best on tie-break), Granda Zuniga, Laznicka, and Kiril Georgiev.