Profylaxe 2 (positionelt)
1 • Porgy •- Paul Johner-Aaron Nimzowitsch
- Carl Schlechter-Aron Nimzowitch 1907
- Jusupow parti
- Tiger Hillarp Persson-Bjørn Ochsner
- Porgy
Frankenstein-Dracula Variation
1 • Porgy •- 4. Sxe4
- 4 , Sg5?!
- Jacob Øst-Hansen-John Nunn 1974
- Ove Ekebjærg-Gert Timmermann korr. 1991
- Porgy
Ambush Attack
1 • Porgy •- eksempel
- Reti-Tartakower 1910
- Lasker-george Thomas 1912
- Torre-Lasker 1925
- Porgy