A nice opening trap I set in one of my recent game.

This is more of a theme that can arise in many different situations. The lesson is "Don't start pushing wing pawns when your pieces are undeveloped."

Yeah but if he would not have taken the knight it would not have happenned that's why I was calling that a trap.

well it rarely happen in a game...

nightdweller wrote: well it rarely happen in a game...

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What rarely happens happened and you cannot discount that fact.

I recently won a very short game with a simple trap of threating checkmate. Of course it rarely happens but there is always the exception to every rule.

This opening is reminiscent of the Ponziani, except that I thought that 2Nf3 was normal.  2Nf3 is the norm in very many 1e4, e4 openings, and it would have nullified this trap so I don't see it as being something that you can hope to use with any regularity.  Rather than this being an opening trap per se I see this as a refutation of not following the addage develop knights before bishops and don't push pawns more than about 3 times in the opening.  To be an actual opening trap your moves would have to refute what were (superficially at least) good opening moves. 

once the bishop has gone to e5 you can stop losing the rook by Nf6 and then whens Bishop takes check Be7 to protect rook with Queen which is also terrible but just showing how you can stop losing the rook(or protect it with a piece)!

Nice, but white could have gotten a fine game with Bxf7+!