Original: After his defeat by Steinitz in 1866 , Anderssen became the most successful tournament player in Europe , winning over half the events he entered -- including the Baden-Baden 1870 chess tournament event , which is considered comparable in the strength of its contestants to recent '' super GM tournaments '' .
Simplified: Anderssen became the most successful tournament player in Europe , winning over half the events he entered -- including the Baden-Baden 1870 tournament , which is comparable to modern strong GM tournaments .