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 Chess Olympiads guda shida: uku don Denmark (1992, 1994
da 1996); uku don Iceland (2006, 2008 da 2012). Shi ne dan wasa na 4 na Icelandic a watan Satumbar 2020.