🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsTürkçeРусскийالعربية한국어中文日本語EntityQ2305104· pop 27· linked from 550 articlesLondon Systemset of chess openings characterized by d4, Nf3, Bf4ConnectionsChess.comEntitySlav DefenseEntityCategoriesChess openings