csmath: 6.d3, 8. Nc3
[Surprisingly passive choice from rather active and aggressive player like Dominguez. That against one of the best Ruy Lopez players around.]
[The result of the opening is that white has achieved nothing, he has a bishop pair but bishop on a2 is not participating the game at all.]
[When black can play such a move then it is clear that white has achieved nothing. These kinds of moves are also typical for Aronian in Ruy Lopez.]
[21. exf5 is Houdini's proposal but no sane GM would play that.]
[Obviously Dominguez is trying to activate bishop on a2 via b1 but there will be no time for that because of b-pawn tactics. Looks like
26. Rad1 Bd6, 27. Re6 Bc5, 28. Bf4 Nb6
would have been better alternative though it is clearly not appealing either.]
[28. Be4 Rab8, 29. d6 bxc3, 30. Bc1 Ne5 with Rfd8 to follow is also rather lousy for white.]
[Now the position is critical and it seems that white is already lost.]
[The following variation is crucial for assessment whether the pawn was worth defending:
29. ...Nc5, 30. Bxg4 Rxd5, 31. Be1 Rd3, 32. Rxd3 cxd3, 33. cxb4 Bxa1 34.Rf6 Bd7 35. Bd4 Bxf2! 36. Kg2 Bb6 37. a5 Bc7
looks like technically difficult ending but it is probably won.]
[30. Rb1 is clearly a better move: 30. ...Nc5, 31. cxb4 Rxd5, 32. bxc5 Rxf5, 33. Bc3 and black ends up pawn up but far away from immediate win.]
[Now we can say the game is strategically over, black has supported passer and white has no effective way of dealing with this.]
[Dominguez is panicking, he knows that he is likely lost but this is making it faster. The alternative:
31. Re4 Nc5, 32. Rxc5 Rxd5, 33. Bg6 b2 (threatening Nb3) 34. Rb1! Rxd2, 35. Rxc5 Bd8! with Ba5 to follow looks awful enough.]
and here the game is effectively over.
[35. ...Rd6, 36. Kg2 Rf6, 37. Rce1 g6 is much stronger since white is paralyzed. Black rook will move to f3.
Nevertheless white is lost either way.]
In few more moves Aronian will prove his position to be winning.
Passive opening by white (was Dominguez scared?) and ineffective bishop on a2 led to yet another simple and straightforward win for Aronian.
Aronian is beating some of the best players in the world and is making it look rather easy.