Solution:

White should move the rook from
A1 to D1 and hence complete the castling move.

Solution:

C7 => B8
Exchange pawn for a knight

Check-Mate

GameOver

Solution:

204

Solution:

128.

There are 62 squares of size 1x1.
There are 41 squares of size 2x2.
There are 18 squares of size 3x3.
There are 6 squares of size 4x4.
There is 1 square of size 5x5.

A total of 62 + 41 + 18 + 6 + 1 = 128.

Solution:

1296

Solution:

I live in a Chess Board.

Solution:

They were not playing against each other.

Solution:

Horse And queen are chess pieces

Solution:

99 matches.

The number of matches will always sum up to one less than the number of players in a knock out tournament. You may calculate it in any manner. Thus 99 matches were played.