George Duke wrote on Mon, Oct 27, 2014 11:11 PM UTC:
Queens are gone by Move 17 when already there are only 5 Pawns left a side:
http://www.chessgames.com/perl/chessgame?gid=1479611. There are forty
more moves after Move 17 Queen exchange. Where does White go wrong?
http://en.chessbase.com/post/world-championship-sochi-official-web-site.