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[what is this?]

A A A London System 4 (early c5) [White] 51 games, 1901-2017 Champions miniature champions A collection of winning miniatures of World Champions against other World Champions. All champions with exception of Steinitz, Lasker and Capablanca played at least one such winning miniature. 42 games, 1921-2014 D00 London System # 4 [Black] 26 games, 2012-2015 Evan's Gambit 7 games, 1950-1995 London System Games 36 games, 1912-2014 sac mate 16 games, 1852-2016