1Best by test according to Bobby Fischer, white takes control over the center and is ready to develop both Queen and Bishop.
1Black's most aggressive option, looking to make things unbalanced and complicated
2Usually the best square for the knight, where it controls the center and supports the pawnbreak d4
2Miezis is keeping his options, and he can choose from a variety for Sicillian systems. The pawn move also prepares action in the center.
3The most ambitious, Delchev aims for rapid developement by opening up for all his pieces.
3Delchev gets easy developement, but back gets two central pawns, gaining longterm potential
4A strong knight
The knight is well placed on d4, covering the maximum 8 squares. Trying to chase it away with a pawn push will create big weaknesses in the black camp.
4in Miezes footsteps
This is one of Miezes pet lines, which a certain Carlsen has played many times when he wants a non-forced game. black avoids a knight jump and prepares b5.
5The white pawns are trying to stop Miezis pawnbreaks.
5A challenge
Miezis knight is well placed on c6, where it challenges Delchev best piece and takes control over the center.
6The pawn move may seem slow, but Delchev wants to develop the knight without getting pinned
6I have never seen this move before. The queen targets the knight in the center. Normally you should not develope your queen this early
7A wise decision
Delchev keeps his knight, probably the best move, not willing to trade pieces when he has more space for his pieces. The black queen also takes the ideal square away from black's knight