I have played a game this morning where I reached the following position:
[fen "r1bq1rk1/1p1nppbp/p2p1np1/2pP4/2P1P3/2N1BN2/PP2BPPP/R2Q1RK1 w - - 0 1"]
I was playing with White. In this position my opponent played e5 which is a very bad move because I can take the pawn en passant and then take the d6 pawn which is unprotected.
I went on to win the game and afterwards I was talking to him and he told me that he thinks that it is an usual move and that taking on d6 is not supposed to be good.
I checked the position with my computer and it gives White an advantage of +2 after taking the d6 pawn. I assume that he forgot his analysis and mixed different lines.
I don't usually play the King's Indian so I'm wondering, are there any lines where Black can play e5 in a position similar to this one and then is bad to take on d6?
I'm just interested in positions which arose from the King's Indian where Black has already played c5.