I am posting this game which I didn't manage to view during the conduct of the WCC but I happen to read in a magazine just recently.

This comes to my mind when I was chatting with Bro Geniokov regarding the current game "BW-RP vs BW-ROW" here in CC -- with the same idea of developing the a8-Rook in a different way ... first, Black play early a5 and later develop the Rook on a6 ...

See how the resourceful Boris Gelfand used such idea to crush Sergey Karjakin ...

[Event "World Cup"]
[Site "Khanty-Mansiysk RUS"]
[Date "2009.12.06"]
[EventDate "2009.11.21"]
[Round "6.1"]
[Result "0-1"]
[White "Sergey Karjakin"]
[Black "Boris Gelfand"]
[ECO "C55"]
[WhiteElo "2723"]
[BlackElo "2758"]
[PlyCount "66"]

1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. Nf3 Be7 5. O-O O-O 6. Bb3 d5
7. exd5 Nxd5 8. h3 a5 9. a4 Nd4 10. Nxd4 exd4 11. Re1 Ra6
12. Qh5 Nb4 13. Na3 Rg6 14. Bf4 b6 15. Qf3 Be6 16. Bxe6 fxe6
17. Qe4 Bd6 18. Bxd6 cxd6 19. Qxd4 Qg5 20. g3 Qf5 21. g4 h5
22. Re4 d5 23. Kh2 Qf3 24. Ree1 hxg4 25. Qe3 gxh3 26. Qxf3
Rxf3 27. Rg1 Rxf2+ 28. Kxh3 Rxg1 29. Rxg1 Nxc2 30. Nb5 Rf3+
31. Kg4 Rxd3 32. Nd6 Ne3+ 33. Kf4 Nc4 0-1

replay the game here:

BW-Rest of the World (BW-ROW)