Chess copy right law

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Avatar of Dezh

I have a question regarding copy right law in chess games. How come people are free to study strong chess players games and puzzles? 

Responses would be really appreciated.

Avatar of Dragec

Several articles on a subject:

http://www.chesshistory.com/winter/extra/copyright.html

http://www.chessvibes.com/columns/copyright-on-chess-moves-shadows-on-the-wall/

http://interviews.chessdom.com/chessbase-copyright-danailov

http://reports.chessdom.com/news-2009/copyright-chess