Dr A. N. Walker wrote:
If you were asked to rank the WCs in order of
the accuracy

Wow, that word. That is the key of the whole thing. Lack of blunder is
by a long way, in my mind, and I think in many's, a long long way from
the word "accuracy".

And some of the questions had to do with #1 move correlation. Which
again raises the question of "accuracy". And not of blunders.

I think that Crafty-12 as an arbiter of accuracy, is a pretty tough row
to hoe.