A trap opening

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shadow-Mas

This is a trap opening.If black capture the knight,white’s queen can capture the rook.Then white can control black’s f8 bishop.

but in most cases,black will move 2.Nc6,that’s a joseki.This opening is only good for dealing with beginners.Because they don’t now joseki.

LowkeyLuke0404
Oo
LunHsieh

This is king's pawn opening

F6 is simply the wrong way to protect e5, also f5/6 is often a blunder especially before development of king's knight

shadow-Mas

The opening is theoretical.It makes the fastest brilliant move(Nxe5 is a brilliant move) but it rarely appears in actual combat.Mature back joseki can avoid it.