user-1: I've got an important tournament game coming up, and I will be playing Black. I will play the Scandinavian if White plays 1.e4, but I won't be able to unbalance the game properly after 1.d4, except if I play the Benoni(Old Benoni cuts out all transpositions). I don't like the Czech Benoni, where the break f7-f5 weakens my kingside.
Is there a line for Black in the Benoni that is tactical, sound, and stops White from getting a large center?

user24498: If you don't feel comfortable playing against large centers you shouldn't play Benoni nor other openings such as KID (which both, by the way, are good choices if you look for imbalanced positions).
I would recommend, based on the proximity of the tournament and your aim for imbalaced positions, to look at Von Hennig-Schara Gambit, which doesn't have a lot of theory and usually leads to sharp play.

user19861: The whole point of hypermodern openings like the Benoni is to encourage a big center. If you don't get that you'd probably be better off playing something else.
The Dutch leads to unbalanced positions, avoids transpositions and can be learned very quickly. The Tarrasch also. Those sound like better choices.

-1: <p>I've got an important tournament game coming up, and I will be playing Black. I will play the Scandinavian if White plays 1.e4, but I won't be able to unbalance the game properly after 1.d4, except if I play the Benoni(Old Benoni cuts out all transpositions). I don't like the Czech Benoni, where the break f7-f5 weakens my kingside.</p>
<p>Is there a line for Black in the Benoni that is tactical, sound, and stops White from getting a large center?</p>
 24498: <p>If you don't feel comfortable playing against large centers you shouldn't play Benoni nor other openings such as KID (which both, by the way, are good choices if you look for imbalanced positions).</p>
<p>I would recommend, based on the proximity of the tournament and your aim for imbalaced positions, to look at Von Hennig-Schara Gambit, which doesn't have a lot of theory and usually leads to sharp play.</p>
 19861: <p>The whole point of hypermodern openings like the Benoni is to encourage a big center. If you don't get that you'd probably be better off playing something else.</p>
<p>The Dutch leads to unbalanced positions, avoids transpositions and can be learned very quickly. The Tarrasch also. Those sound like better choices.</p>
