They played many games over the visit and Grandpa did win all but two. Still! I can't believe he won at all. Grandpa reports that DS has an extremely aggressive center game and that he is using real openings (I don't know where he learned these--maybe at chess club). He still needs to improve his end game and be careful not to be so aggressive that he forgets to defend his king. I can't even tell you what DS is doing with his game at this point--he's so far beyond me--so it's nice to get someone else's take on it.