This is a website to improve your openings in chess.
There are many different openings and how to defend them.
To learn the best openings and defense this webiste will help you a lot.
There are many more openings for the black and white pieces that are on this website.
The reasons for the different colors on the board are different chess sets.
The King's Pawn Opening website is designed after the common chess board.
Some others how ever are much cooler like the Battle of Issus Chess Set used for the Reti Opening website.
And finally the Queen's Pawn website is designed after the Royal Diamond Chess Set.
That is why they are designed the way they are.