try to defeat your opponent in 4 moves

Before we start, lets consider that your chess army is white to do this trick. first, move your Pawn to open from E2 to E3 or E4(look at the chess board in the left side), then if your opponent was done on his first turn to move, then move out your Bishop from F1 to C4, so you will target his Pawn which is placed in F7, if your opponent does not notice your strategy after your turn, just try to continue it, next move is your Queen from D1 to F3, so your Queen was also pointed to his Pawn placed in F7, this is the most critical situation in this strategy because your strategy was became visible and easy to notice by your opponent, after your opponent's turn and if he does not make any move against your strategy, finish him by moving your Queen in his Pawn placed in F7, but before you make this final move make sure that your Bishop is supporting your Queen, otherwise your strategy is useless.