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In http://www.math.uiuc.edu/K-theory/0357/ Karpenko utters the following:

Conjecture 1.6. If an anisotropic quadric $X = Q$ possesses a Rost correspondence, then the quadratic form (defining $X$) is a minimal Pfister neighbor.

Since the Paper has been released 15 years ago, I wonder if there has been made any progress on the conjecture.

Everything regarding Rost-Projectors is defined within the paper.

I am quite new to the subject and I am "working" myself through most of the papers in order of their release, so it might be that my question is obsolete today. On the other hand, there is also a remark in "Rost Projectors and Steenrod Operations" by Karpenko and Merkurjev from 2002 that the problem is still not solved, except for the cases of $dim(X) = 3,7$.

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Last week i asked Professor Nikita Semenov and he replied that this is still an open Problem.

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