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In 1987 I wrote a booklet on the Anti-Taimanov Variation with 6.Bf4, which might have contained 25 pages or so. I came up with new ideas and might have inspired some of the readers to adopt 6.Bf4 [...]

The Swedish GM Ulf Andersson is famous for his extreme dry playing style. In his games, his main objective is to stifle his opponents activities with the help of astute prophylactic maneuvers. [...]

  [Event "Gausdal"] [Site "?"] [Date "1986.??.??"] [Round "?"] [White "Howell, James C"] [Black "Wahls, Matthias"] [Result "1-0"] [ECO "B89"] [WhiteElo "2400"] [BlackElo "2460"] [Annotator [...]

There are moments, when the state of current theory is unsatisfactory for your repertoire. Then, you have the choice to either back down and look for another line, or to do your own research. [...]

  [Event "Hamburg"] [Site "Hamburg"] [Date "1985.??.??"] [Round "?"] [White "Wahls, Matthias"] [Black "Behrhorst, Frank"] [Result "1-0"] [ECO "B05"] [WhiteElo "2285"] [BlackElo "2320"] [...]

A simple classification would divide openings into two groups: pattern openings and knowledge openings (or memory openings). A knowledge opening implies strong contact between the two armies, [...]

In 1984 I almost won the German junior championship (under 20) with the age of 16. In the end I finished shared first place with even the same Buchholz as the champion Peter Meyer. Alas, he was [...]