Chess Opening Theory/1. c3/1...c5

Saragossa Opening
If white plays 2.e4 it is a transposition to the Alapin. You can keep this as unique Saragossa theory by playing 2.d4, but this is also likely to transpose into a London System with c5 and cxd4. This is considered as a bad opening as it hinders white's immediate piece development and is rarely seen in master games. In the Lichess Masters Database this line (1.c3 c5) has only appeared 27 times.