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by Bob van de Velde
Several years ago, Reuben Fine and Salo Landau’s Schaaksleutel (= Chess Key) was presented in the Nieuwsbrief (Newsletter) of the Max Euwe Centre (no. 76, April 2011) as an exceptional object ‘from bygone days’. It is a kind of disc made of thin cardboard, the size of an LP. When this disc is turned inside a frame, which is also made of cardboard, it shows a multitude of chess opening variations, 116 in number. As far as I know, this was the first time that someone attempted to present chess opening theory in such an easy-to-use, systematic way. No wonder that MEC trained the spotlight on this copy of the second, improved edition (≥ 1936) of a quite rarely preserved instrument! Initially it couldn’t be retained in the MEC collection, but eventually the Amsterdam chess centre was able to obtain it after all.