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Alexander Grischuk vs Yu Yangyi
"Yu Who?" (game of the day Jul-21-2019)
Grand Prix Riga (2019) (rapid), Riga LAT, rd 2, Jul-17
Queen's Gambit Declined: Harrwitz Attack. Two Knights Defense (D37)  ·  1-0


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Kibitzer's Corner
Premium Chessgames Member
  thegoodanarchist: Yu Who?
Jul-21-19  Ironmanth: Terrific maneuvering to bring home the point. Thanks, chessgames! Y'all try to stay cool out there.
Jul-21-19  MirrorStalemate: Yangyi is Yu's given name.
Jul-21-19  thegoldenband: Did somebody say "Yu Who?"

Premium Chessgames Member
  Breunor: It looks like the game starts falling apart for black after 27 Bb4?

Computer says Nb4 keeps it even:

1) +0.08 (31 ply) 27...Nb4 28.bxc4 Rxc4 29.Rxd5 Nxd5 30.Bd4 Rc2+ 31.Kf1 Nb4 32.Rb1 Ra2 33.Ne5 Rxa5 34.Rc1 Rd5 35.Rc8+ Bf8 36.f4 a5 37.Bb6 Nc6 38.Nxc6 bxc6 39.Ra8 Kf7 40.Bxa5 Rd3 41.Ke2 Rb3 42.Bd2 Ra3 43.Rxa3

Here we see that black can play Nxd5 to complete the rook exchange.

After the text move, we have:

1) +1.40 (30 ply) 28.Bxb4 Nxb4 29.bxc4 Rxc4 30.Rb1 h6 31.Rxd5 Nxd5 32.Rxb7 Rc2+ 33.Ke1 g5 34.Nd4 Ra2 35.Nxe6 Rxa5 36.Nd4 Nc3 37.Rb2 Kf7 38.Kd2 Nb5 39.Kd3 Nxd4 40.exd4 Rb5 41.Rc2 Rb6 42.d5 Ke7 43.Kc4 Kd6 44.Ra2 Ke5 45.Re2+ Kf4

30 Rdc5 takes the game form bad to lost:

1) +2.83 (31 ply) 31.Rd8+ Kf7 32.Nd2 Nc6 33.Rd7+ Ke8 34.Rxc4 Rxc4 35.Rxb7 Rc5 36.Rxg7 h5 37.Ne4 Rxa5 38.Rh7 Ra2+ 39.Kf3 Ra5 40.Nf6+ Kf8 41.Nxh5 Ne5+ 42.Kg3 Nf7 43.Nf4 Kg8 44.Rh4 Nd6 45.Kf3 e5 46.Ne6 e4+ 47.Kf4 Rf5+ 48.Kg3 Kf7 49.Rh6 Rd5 50.Kg4 Rd2 51.Nf4 Ke7 52.Rh7+ Nf7 53.Kf5 Ke8 54.h4 Rxf2 55.Kxe4 a5 56.g4

Better was:

1) +1.14 (25 ply) 30...Rb5 31.Nd4 Re5 32.Kf3 Rd5 33.Rb2 e5 34.Rbxb4 Rxb4 35.Rxb4 exd4 36.exd4 Rxa5 37.Rxb7 Rf5+ 38.Ke3 Rf7 39.Rb3 a5 40.Ra3 Ra7 41.Ke4 Kf7 42.Ke5 Re7+ 43.Kd6 Re2 44.Rf3+ Ke8 45.d5 Rc2 46.g4 a4

I think the key difference is that with the actual move, the rook on c4 can't move and defend the knight on b5 after white plays Nd2; with 30 Rb5, the rook on c4 can retreat to c7 if white plays Rd8 ch and then Nd2.

Jul-21-19  cormier: better is 24.Ra4 Nb4 25.Rc1 Rd5 26.Bc3 Rb5 27.Nd2 Rc6 28.Ke2 g6 ⩲ +0.71 (27 ply)
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