eChess

This site is interesting if any of you play chess or want to learn about the masters. The site has famous games in javascript that you can follow play-by-play and read commentary on each move. I need help, though. This game ends with what I would consider a very strange move, yet critic Anne Sunnucks says "Many respected critics consider this stroke to be the single most amazing move of chess ever actually executed on a chess-board." Really? See if you can figure out why. Also, learn to play here.