the idea of the sécilien has sacssuful played by black so we see the 3 game in1950 svetozar gligoric vs Miguel Najdorf 0-1     Nicola Rossolimo Pal Benko 1/2 1/2  in 1969  ,, Roman Dzindzichashvilli vs Mikhail Tal in 1968 0-1

here we can see a game with other option is 1e4 c5 2 Nc3 Nc6 3 f4 e6

the idea of e6 is to give black a very strong push of d5 and many complication in the center let's see the game Rodriguez vs Milko Bobotsov

So we can see also a game between  Nicolas Rossilimo vs Pal Benko played in 1969 

we see that the sécilien game is  a famous opening and we see the game between Svetozar gligoric and Miguel Najdorf in 1950 .

so let's see a game played in 1968 between Roman Dzindzichashvili vs Mikail Tal