Richter was simply a fantastic pianist ....

... And I think he is presenting here an interpretation of Rachmaninov, which is very touching and at the same time very "uncheesy". Often this concert will be drowned in Pathos, Richter avoids consistently while remaining emotionally. I can spend hours listening.
The Tchaikovsky took a little longer to convince me, I found him not always perfectly matched with the orchestra - there are passages because one has the impression, pianist and orchestra play rather than compared with each other. But after a while I had obviously been listening to such an extent that I can abgewinnen the track a bit "rough" a lot of interpretation.