• The Hardest chess problem in the world? http://hebdenbridgechessclub.blogspot.com/2011/02/hardest-chess-problem-in-world.html 129 comments 18/9/2015

• Fun article: "The Hardest chess problem in the world?" http://hebdenbridgechessclub.blogspot.com/2011/02/hardest-chess-problem-in-world.html 39 comments 18/9/2015 chess

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