comment: A somewhat \"mysterious rook move\" as Nimzowitsch phrased a long time ago, but this is well known to opening theory. The rook can be useful to support a plan with e6-d5 or even d5 immediately.
context: 1. e2e4  1... c7c5  2. g1f3  2... b8c6  3. b1c3 This move is a good option if you don't want to get into a battle in the Sveshnikov Defense. 3... g7g6 Black chooses the Accelerated Dragon. 4. d2d4  4... c5d4  5. f3d4  5... f8g7  6. c1e3  6... g8f6  7. f1c4  7... e8g8 Because the pawn remains on d7, Black has better chances if we compare the position with a normal Dragon. 8. c4b3 