Every chess player, who begins his games with the move 1.e2-e4, should be perfectly prepared to encounter the move 1...c7-c5. Why is this opening so dangerous for White? The point is that in all the basic variations of the Sicilian Defence the fight is double-edged and often White risks at least as much as Black does. White is practically deprived of the possibility to simplify the position by numerous exchanges.
In almost all the variations of the Sicilian Defence an enormous amount of theory has been amassed and not all the chess fans can afford to spend so much time and efforts in order to learn the endless variations in all the main lines. Accordingly Alexei Kornev decided to choose systems which did not require phenomenal memory from the White player, but were based on sound positional basis.