Colin McNab

Colin Anderson McNab is a Scottish chess player. He is Scotland's second player to be awarded the title of Grandmaster (GM), fulfilling its requirements in 1992 just after Paul Motwani. After achieving his three norms, he strained to get his rating up to the required 2500 level, and is possibly unique among Grandmasters in only achieving a published rating of 2500 some six years after being awarded the title. The FIDE regulations in force at the time stated that an 'intermediate' rating at any stage during an event would suffice, and that ratings between 2498.5 and 2500 would be rounded up, which is indeed what happened in 1992. He is also an International Master of correspondence chess since 1993 and International Master of chess problem solving since 2007.