Name the players thet have disputed an official (1886-1990, 2006-2023) or split ( 1993-2005) World Chess Championship match.
https://en.wikipedia.org/wiki/List_of_World_Chess_Championships
In 1948, 2005 and 2007 no match was disputed, since they were round-robin tournaments. Only the winner is required.
FIDE's championships in 1998, 1999, 2000, 2002 and 2004 were single-elimination tournaments. Both finalists are required.
Start by naming any country that France borders. Then name any country that borders any of those countries. Then keep going until there are no more countries left to name.