We thank the following websites for use of their images:

http://uk.businessinsider.com/win-a-game-of-chess-in-two-moves-2016-4?r=US&IR=T

http://www.picgifs.com/clip-art/playing-chess/

http://singleinvoicefinance.com/category/blognews/

http://www.khelnama.com/140812/others/news/world-chess-olympiad-india-manage-hold-higher-ranked-armenia/16176

https://www.shutterstock.com/video/clip-6470666-stock-footage-chess-horse-takes-king-check-mate.html

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