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The PIN

The PIN

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GM_KingShreyash2630
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Hello everybody !! I am back with another cool and interesting blog...

So let's look at the topic for today's blog...

The PIN:

A PIN is a situation brought on by an attacking piece in which a defending piece cannot move without exposing a more valuable defending piece on its other side to capture by the attacking piece. Moving the attacking piece to bring on the pin is called pinning; the defending piece so restricted is described as pinned.

Here is an example:

In this example, White's Queen is pinned to the King by Black's Rook. If the White Queen moves, Black can give a check but it will be ILLEGAL to move the Queen.
There are 2 types of pins:
  1. Absolute pin 
2. Relative pin
An absolute pin is a type of pin in which the pinned piece can't move. If the pinned piece moves, it will be illegal. Take the example below:
In this example, Black can't move his queen as it would be illegal.
Moving on to Relative pins, These are the types of pins in which the pinned piece can move, but it would be a disaster as the piece behind will be lost. Take the example given below :
The Rook is pinned to the Queen. The rook can move, but it would be a disaster as the Queen would be gone.

Depending upon the movement of pieces, there are 2 types of pins :

1. Straight Line Pin

2. Diagonal Line Pin

A Straight Line Pin is a type of pin which is done by a piece which attacks a straight line. These pieces include a Rook and Queen. Below is an example:

This is a very fine example of a Straight Line Pin. When the Rook or a Queen pin a piece in a straight line, it is called a straight line pin.

A diagonal line pin occurs when a piece is pinned along a diagonal. This is done by a Queen and a Bishop. Take the example below :

This is a fine example of a diagonal line pin. When the Bishop or the Queen pins a piece along a diagonal, it is called a diagonal line pin.

Puzzle Time !!!

2. White to Play - If it was not for the protection of the Black Bishop by the Queen, White would play R X B Mate. Can you find a way of driving the Queen from this role ??

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Thank You all and have a nice day !!

@GM_KingShreyash2630