How do you get the Benoni opening achievement?

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mxm250405
On the explorer it says 1. d4 Nf6 2. c4 c5 is the Benoni Defense but I've played multiple games with this opening and I haven't gotten the achievement. Is there some kind of variation or continuation that has to be played in order to get the achievement?
harriw

I'm not sure what is needed for the achievement, but for the position to get a Benoni structure, White needs to play 3. d5 and Black must not reply 3. ... b5, which is the Benko gambit. The main line (called Modern Benoni) is 3. ... e6. White then develops either of the knights (4. Nc3 is the main line) and then there is an exchange of pawns 4. ... exd5 5. cxd5 d6.
Black has other options for the third move, 3. ... e5 leads to Czech Benoni (pawns on c5-d6-e5, a Stonewall-type structure), while 3. ... g6 and 3. ... d6 are more waiting and lead to either of these depending on what Black does with the e-pawn.

GM_YMe

It has to be the modern variation which is 1.d4 2.Nf6 2.c4 c5 3.d5 e6.

browhatusernameisnttaken

Mine too I've played it many times and it's not working

OfficialSrivatsaplayer

I also tried it, but it's not coming for me too