Fork in Chess

The Wiki pedia Definition:

In chess, a fork is a tactic whereby a single piece makes two or more direct attacks simultaneously. Most commonly two pieces are threatened, which is also sometimes called a double attack. The attacker usually aims to gain material by capturing one of the opponent's pieces. In other words,Fork is a kind of Double attack against two or more targets at the same time.

In the following example it is White to move first.

White plays Rf7+(sse the position below)giveing check to king and palnning a beautiful fork in next move

Let's say Black King goes to g6 square playing Kg6 then here comes Rb7! by white forking two Bishops on B-File(see diagram below)

Let's take another example with white to move again.

White applies a beautiful combination Qxf7!!. Now Black is forced to capture else checkmate is unstoppable. ..Rxf7