A.Korniew "Praktyczny repertuar dla białych z 1.d4., TOM 1,.Obrona Słowiańska,Gambit Hetmański i inne" ( K-3598/r )

The O’Kelly variation of the Sicilian Defence (1 e4 c5 2 Nf3 a6) is a wonderful system for those who enjoy playing Sicilian positions but don’t want to get bogged down in heavy theory. The O’Kelly relies far more on an understanding of general strategic ideas and middlegame planning than on rote memorisation of opening moves. One of the benefits of the O’Kelly is that White’s natural continuation of 3 d4, although very frequently played, permits Black confortable development and an easy game.

White players who enjoy playing the Ruy Lopez (1 e4 e5 2 Nf3 Nc6 3 Bb5) often expect to have an easy time in the opening. Numerous Black systems allow White to complete development with natural moves which often results in a small but clear advantage. Not so The Schliemann.