I have now seen both Nureyev's 1966 film of Swan Lake and his final version choreographed for the POB. And I was shocked at how different the two productions were.
Nureyev's 1966 version seemed to be very self-consciously "different." Different musical arrangements (for the Black Swan pdd especially), different choreography (6 cygnets instead of 4, an allegro ending to the Love Duet, no pas de trois in the first act), different production values (the garish costumes and a year's worth of eyeshadow on Nureyev, Siegfried drowning). It was like the rebellious 60s version of Swan Lake.
Nureyev's final version for the POB, however, is essentially an extremely traditional production. It was as if he decided all his new ideas in 1966 were bad, and it was better to go back to Petipa/Ivanov. All the traditional musical numbers are used. He listened to Margot Fonteyn and restored the mime, especially in the second act. Pas de trois? Back. The production is very understated and classy. The ending is still tragic, but it's much more effective than the 1966 drowning -- Odette jumps back in the lake, and Siegfried lies lifeless, and Rothbart emerges from the lake, victorious. A heart-wrenching conclusion. The only "different" thing about this Swan Lake is of course some extra solos for Siegfried. But the core of the Petipa/Ivanov Swan Lake is firmly retained, something I can't say about many recent productions (the McKenzie version, the Martins version, even the Grigorivich production). I much prefer this to the Bourmeister production that the POB had been dancing before the Nureyev version. Nureyev's is much more traditional, much closer, I think, to Petipa/Ivanov.
