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Andrey Rychagov vs Alexsej Lanin
TCh-RUS Major League (2008), Dagomys RUS, rd 1
Queen's Gambit Declined: Harrwitz Attack. Main Line Old Main Line (D37)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Mar-06-18  stst: The game's move allows Rd1+ which lets go the Q... As some say, "I like Nb5 better!!" showing the beauty of two Ns attack - sometimes, esp. as an artist, elegance counts more!!
Mar-06-18  ChessHigherCat: Fork'm & Pork'm
Mar-06-18  radtop: I went for Nb5.
Black moved his Queen twice and his bishop thrice, giving White two extra moves that he put to good use.
Mar-06-18
Premium Chessgames Member
  agb2002: The material is identical.

Black threatens Bxf4.

Either 14.Rxd6 (14... Rxd6 15.Nb5; 14... e5 15.Rxd8+ Qxd8 16.Bg5) or 14.Nb5 wins decisive material.

Mar-06-18
Premium Chessgames Member
  Richard Taylor: It's a toss up between Nb5 and Rxd6. The second time I thought of Rxd6 I had a retained image of the R on d1 which made me choose the other move. But before that Rxd6 seemed a bit sexier...
Mar-06-18
Premium Chessgames Member
  malt: Went for 14.R:d6 R:d6 15.Nb5
Mar-06-18  Cybe: 12... Be7 (not Bd6?) and Black is OK.
Mar-06-18  saturn2: <12... Be7 (not Bd6?) and Black is OK>

Not sure about that.
After 13 Nb5 there is the threat Bc7 and the black queen gets into trouble.

Mar-06-18  Ratt Boy: <saturn2: <12... Be7 (not Bd6?) and Black is OK> Not sure about that.
After 13 Nb5 there is the threat Bc7 and the black queen gets into trouble.>

12...♗e7 13.♘b5, e5 handles the ♗c7 threat. It loosens Black's position a lot, and White should get some attacking chances, but not the Exchange right away.

I think Black screwed up earlier by moving ♕a5. He's just behind in development, and his pieces aren't well coordinated.

Mar-06-18  Pchief: how was it a castled being beaten by an uncastled?
Mar-06-18  zb2cr: Looks like 14. Rxd6, Rxd6; 15. Nb5 wins back the Rook, giving White a piece advantage. 14. Nb5 seems to also win material, but it's a case of Q vs. 2 minor pieces.
Mar-06-18  dumbgai: Surprising that an IM would lose like this.
Mar-06-18
Premium Chessgames Member
  gawain: The only reason I can see to prefer 14 Rxd6 over the immediate 14 Nb5 is that it takes a step toward simplification. That is what you usually want to do when you are going to be a piece up.
Mar-06-18  Cheapo by the Dozen: I went with Nb5 as well. But the game line forces simplification, and hence seems slightly better.
Mar-06-18
Premium Chessgames Member
  morfishine: If <14.Nb5> then Black can part with the Queen for two minors after 14...Bxf4 15.Nxc7 Bxc7

Which is why I went for <14.Rxd6> right off

*****

Mar-06-18  Monocle: I saw that 14.Nb5 and 14.Rxd6 both work, but in a game I'd probably go for Rxd6. It seems cleaner.
Mar-06-18  DrGridlock: <Cheapo by the Dozen: I went with Nb5 as well. But the game line forces simplification, and hence seems slightly better.>

Slightly better is right. My engine shows a 13/100'ths of a pawn preference for Rxd6.

Mar-06-18  Lambda: Rxd6 seems slightly better because you just get a straight piece, whilst against Nb5 black can lose a queen for two pieces (including the two bishops) instead, which is slightly less of a deficit.
Mar-06-18  PJs Studio: Being it was supposed to be easy and I saw Nb5 first, I went with it. However, I agree with the engines that Rxd6 is a touch better.
Mar-06-18  lzromeu: Nb5 works but Rxd6 is stronger
Found this line
14. Nb5 Nb4 15. Qd2 Qe7 16. Bxd6 Rxd6 17. Qxd6 Qxd6 18. Rxd6 Nc6 19. O-O a6 20. Nc3 h6 21. Rfd1 Ne8 22. R6d2 b5 23. Be2 Bb7

All other lines goes equal or less

Mar-06-18  cormier:


click for larger view

Analysis by Houdini 4

12...Be7 13.Bd3 e5 14.Nc4 Qc7 15.Bg3 Be6 16.Nb5 Qb8 17.0-0 g6 18.h3 a6 19.Nd4 Nxd4 20.exd4 Rxd4 21.Bxe5 Rxc4 22.Bxc4 Qxe5 23.Bxe6 fxe6 24.Rfe1 Qc5 25.Qb3 Kg7 26.Rxe6 Qc7 27.Qd3 Rc8 28.b4 Bf8 29.Qf3 Be7 30.Qe3 Bf8 31.Qg5 Be7 32.Rde1 + / = (0.31) Depth: 25

...

Mar-06-18  cormier:


click for larger view

<<<<<Houdini 4:

10...Be7> ... 11.Nd2 e5 12.Bg5 d4 13.Nb3 Qb6 14.Bxf6 Bxf6 15.Nd5 Qd8 16.Bd3 g6 17.exd4 Nxd4 18.Nxd4 exd4 19.Nxf6+ Qxf6 20.00 Bd7 21. Book opening 00:00:00>

...


click for larger view

Analysis by Houdini 4

21.Be4 Bc6 22.Bd5 Rfe8 23.Qd3 Kg7 24.b4 a5 25.Qxd4 Qxd4 26.Rxd4 axb4 27.axb4 Ra2 28.Bxc6 bxc6 29.c5 Ree2 30.g3 Rab2 31.Kg2 Rec2 32.h4 h6 33.Kf3 Rb3+ 34.Kg4 Rbb2 35.Kh3 Rd2 36.Rxd2 Rxd2 37.f3 Rd3 + / = (0.34) Depth: 26>

Houdini 4

11.Rd2 Rd8 12.cxd5 Nxd5 13.Nxd5 Rxd5 13.Bd3
Book opening 00:00:00>


click for larger view

Analysis by Houdini 4

14...e5 15.Bxh7+ Kf8 16.Bg3 g6 17.Bxg6 fxg6 18.Qxg6 Rxd2 19.Nxd2 Qd5 20.Qh6+ Ke8 21.Qh5+ Qf7 22.Qh8+ Kd7 23.0-0 Bf6 24.Qh6 Qg7 25.Qxg7+ Bxg7 26.Rc1 Ke7 27.Bh4+ Kf7 28.Ne4 Kg6 29.Rd1 Bf8 30.f3 Be6 31.Kf2 Rc8 32.Bf6 b6 = (-0.25) Depth: 24>

Mar-06-18  cormier:


click for larger view

<<<if 10...Be7>

Houdini 4:

11.Be2
Book opening 00:00:00>


click for larger view

Analysis by Houdini 4

11...Ne4 12.cxd5 Nxc3 13.bxc3 exd5 14.0-0 Rd8 15.a4 g6 16.h3 Qc5 17.Nd4 a6 18.Rd2 Bf6 19.Rb1 Na5 20.Rdd1 Bd7 21.Rdc1 Rac8 22.Qa2 Re8 23.Bf3 Be6 24.Nxe6 fxe6 25.c4 Nxc4 26.Rxb7 Re7 + / = (0.35) Depth: 24>

Mar-06-18
Premium Chessgames Member
  patzer2: I picked 14. Nb5 +- (+3.50 @ 19 ply, Stockfish 9) for my Tuesday puzzle attempt. It wins and is almost as strong as the game continuation 14. Rxd6 Rxd6 15. Nb5 +- (+4.77 @ 21 ply, Stockfish 9).

For an improvement for Black, 12...Be7 = (+0.12 @ 20 ply, Stockfish 9) holds the game level.

Mar-06-18
Premium Chessgames Member
  patzer2: After 12...Bd6? 13. Nb3 +- (+3.94 @ 24 ply, Stopckfish 9), Black is busted.
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