Willem Barend Hendrik Meiners vs Jan Frederik Heemskerk
DCA Congress 27th Amsterdam NED round 2 1899.08.07
Ruy Lopez: Berlin Defense, Berlin Wall 1/2-1/2

Jan Frederik Heemskerk vs John De Soyres
DCA Congress 31st Hilversum NED round 4 1903.08.??
English Opening: Mikenas-Carls Variation 1-0

Benjamin Leussen vs Jan Frederik Heemskerk
DCA Congress 31st Hilversum NED round 5 1903.08.??
Russian Game 1-0

Jan Frederik Heemskerk vs Johannes Filippus Malta
DCA Congress 18th The Hague NED 1890.??.??
Scotch Game 1-0

Jan Frederik Heemskerk vs Rudolf Johannes Loman
DCA Congress 19th Utrecht NED 1891.??.??
Queen’s Gambit Declined: Alapin Variation 0-1