I remember him from the 1991 Eastbourne conference. We had played in Yorks/Lincs a few times as teenagers and I think he knew Matthew Turner well who was the best player among us. Obviously its a few years now, I am assuming there was an accident or sudden illness. Hope his family are ok.
http://www.chess.com/members/view/CalvinDKnowles
This week, an old friend passed away.
He played since he was a kid and he spent hours teaching others the game
You will be missed old friend