After adding the Karelian HG things "clicked" in Northeast Europe. This Ancient Karelian sample is closely related to Yamnaya people, but with less or no European farmer ancestry. This lack of farmer genes became in new results balanced by additional Hungarian Neolithic farmer genes, especially among northeastern and ancient Corded Ware samples, and as a result chisq is now pretty much lower in Northeast Europe. You see on the Excel-sheet also the older chisq for comparison. It is worth of noticing that both northern hunter-gatherer groups (Scandinavian and Karelian) are necessary to obtain best fits in the north and that my second test proved the western hunter-gatherer (Hungarian neolithic HG) being quite distant for all present-day northern populations, even for some southern ones, like for Basques.
I tried also to find out the lacking piece that could complete certain South European admixtures. The best fit was obtained among Greeks by adding something like Turkish-Iranian and in a case of Maltese and Sicilians also North African genes (Turkish-Iranian + Tunisian). It is hard to say exactly for what this Turkish-Iranian stands for, anyway Lebanese, the best Near-Eastern admixture gave a poorer result.
Download new results here.