SECOND
Usually a strong level player used to aid participants in international events to prepare their games and analyse positions. According M. Euwe the first use of seconds more or less officially recognised, were for the match Schlechter-Tarrasch, 1911 but there are trace of it at the match Staunton vs Saint Amant in 1843. The known seconds were Koblantz (Tal), Dorfman, M, Gurevich, Azmaiparashvili (Kasparov), Stean and Murey (Korchnoi), Illescas and Bareev (Kramnik), A. Petrosian (Leko), Ubilava (Anand), Nikitin (Kasparov and Bacrot), Chuchulov (Van Wely and Giri), Ye (Xie Jun), Huzman and Rodstein (Gelfand).