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Related Openings
KGA - Schallop defense e4, e5, f4, exf4, Nf3, Nf6
KGA - Fischer defense e4, e5, f4, exf4, Nf3, d6
KGA - Gianutio counter-gambit e4, e5, f4, exf4, Nf3, f5
KGA - Bonsch-Osmolovsky Variation e4, e5, f4, exf4, Nf3, Ne7