Rubuta ci gaba ga wannan sakin layi - An haife shi a 1966, Danielsen ya sami lambar Grandmaster a 1996. A cikin 1993, ya gama na farko a cikin Kofin Politiken tare da Igor Khenkin da John Emms a kan maki 71⁄2/10. Ya taka leda a gasar Olympics shida: uku ga Denmark (1992, 1994 da 1996); uku ga Iceland (2006
, 2008 da kuma 2012). Shi ne dan wasa na 4 na Icelandic a watan Satumbar 2020.