AboutTony D'Aloisio Expertise I've read a good deal on the subject and I can answer a lot of chess history questions (or at least I'll know where to look them up). Also questions regarding analyzing specific positions (although with the advent of powerful chess software, this isn't likely to have the importance it once did).
Experience I was a national master in the US for a number of years. My peak USCF rating was 2290, and I was ranked in the top 150 in the state of California. My current published rating is 2177.
Education/Credentials B.A. Sonoma State University 1984 (English major with Communications emphasis)
Question When your opponent has only his king left how many moves do you have to checkmate him before it turns into a stalemate?
Answer I believe you're referring to the 50-moves rule. A game can be declared a draw after 50 moves (by both sides) if during that time 1) no capture takes place, and 2) no pawn is moved. Note that your opponent does not have to be reduced to only his king to be able to claim a 50-moves-rule draw.