The chess database Opening Master has been on the market since 2004 when it was registered under the copyright protection. It was marketed mainly in Central Europe where its roots are coming from but it reached so much popularity then it is ready for entire chess population. Back then it was the pilot ''alpha'' project after about 3 years of research and development and had around 4.2 millions of non -commented games. It's a big step considering now 6.2 millions.
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