What strenght ?

Hey all, my mom said that she played chess when she was young and that her dad and her uncle played too.

From what I know, she would have been around 750-800 fide rated.

However, she told me that her uncle was playing blindfold chess and beat her and his dad all the time (She thinks that he was a medium and played throught mediumnity ).

I'd estimate my grandfather (the dad of my mother) to be around 1400 fide rated.

At least how much rated a player needs to be to beat a player rated 1400 95% of time, blindfolded?

I am just wondering what strenght was my ''grand uncle''

about 300 points stronger (1050-1100).  presumably without the blindfold much stronger than that (maybe 1500+?)

sftac

300 points stronger than 1400, not 750-800 XD.

With blindfold, how much?

Same deal, about 300 points stronger (~1700), corresponds to 95% of the games usually.

sftac

Yeah but in the 1700, the blindfold isn't counted?

Your great grandad was good.  I don't think a rating system even existed back in those days, though, so trying to give him an arbitrary rating is really kind of an exercise in futility.

Not your original question but if he's playing ~1700 blindfolded, he ought to manage ~1900 or so if he can see.

sftac

Oh gosh, I wish he was still alive to play with him :L