Grunfeld Trends 2012

The following position is now very popular in the g3 Grunfeld.

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.cxd5 Nxd5 6.Nf3 Nb6 7.Nc3 Nc6 8.e3 0–0 9.0–0 Re8 10.Re1 a5

Here is an important recent game showing the latest developments.

Sargissian,G (2679) - Vachier Lagrave,M (2711)
Grunfeld g3 10.Re1 a5[D76]
TCh-ESP CECLUB Div Honor 2012 Leon ESP (1.4), 05.11.2012

Position 1
White is preparing to attack on the dark squares. Assess the alternatives and recommend one for black
(a)24...Nc4
(b)24...Rd7

Black to Play

24.Qf4

Position 2

What should black do now?

32...Rdxd5(chops off the active Rd5 and leaves Re5 in the center)

32...Red5(chops off the active Rd5 and leaves Rd7 to guard the 7th rank)

32...f6(holds the important e5 point and keeps up the pressure on Rd5)

32...Rde7(seems passive and gives up the d-file)

Black to Play

32.Rd5