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Valeriy Neverov vs Mukherjee Debarshi
15th Delhi Open (2017), New Delhi IND, rd 2, Jan-10
Zukertort Opening: Sicilian Invitation (A04)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
May-10-18
Premium Chessgames Member
  agb2002: The black queen protects the rook.

This suggests 27.Qb7, threatening c7:

A) 27... Rxb8 28.Qxb8+ Bf8 29.Bd6 (29.Bh6 Qb4 30.Qa8 Qe4+ 31.Kh3 Qe6+ 32.g4 Qe7 33.Bxf8 Qxf8 34.Qxa7 is much slower) 29...h5 (29... h6 30.Qxf7+ Kh8 31.Be5#) 30.Qxf8+ Kh7 31.Qxf7+ Kh6 (31... Kh8 32.Be5#) 32.Bf8+ Kg5 33.Qf4#.

B) 27... Rf8 28.Bd6

B.1) 28... Qa4 29.Bxf8 Qe4+ 30.Kh3 Qe6+ 31.g4 h5 (31... Bxf8 32.Qb4 h5 33.Qxf8+ Kh7 34.Qh8#) 32.Bxg7+ Kxg7 33.Qb2+ f6 34.f3 + - [R].

B.2) 28... Qxa2 29.Bxf8 Bxf8 30.Qe7 wins.

B.3) 28... Qc3 29.Bxf8 Bxf8 30.Qe7 Qg7 31.Qxa7 + - [R+P vs b].

B.4) 28... Rxb8 29.Qxb8+ Bf8 30.Qxf8#.

C) 27... Bd4 28.Bc7 Bb6 29.Rxd8+ wins.

D) 27... d4 28.Bc7 Qd5+ 29.Qxd5 wins.

-----

The alternatives based on a queen sacrifice doesn't seem to work. For example, 27.Qb5 Qxb5 (27... Rxb8 28.Qxb8+ Bf8 29.Bd6 wins) 28.Rxd8+ Bf8 29.Bh6 Qb4 30.Rxf8+ Qxf8 31.Bxf8 Kxf8 32.Kf3 Ke7 33.Ke3 Kd6 34.Kd4 f6.

May-10-18
Premium Chessgames Member
  agb2002: I missed 27... Bf8.

Better luck tomorrow.

May-10-18  ChessHigherCat: <landshark: 27.Bg5 is the finesse move.>

Bg5 is the finesse move I neverov seen in my whole life.

May-10-18  leRevenant: Following on the claws of <ChessHigherCat:> , Verily, I say unto you: I Konstantly run out of ideas by Wednesday so I'd Neverov thought of today's solution.
May-10-18  Mayankk: I was sucked in by the beauty of Qb5 as well. Just seemed too beautiful a move to not be the solution.
May-10-18  Walter Glattke: agb 2002: I plead for E) 27.-Qb6 28.Bc7? Qxb7 29.Rxd8+ Bf8 30.Bd6 Kg7 -+, while 27.Qb7 Bf8 seems to get draw, so as 27.Qb7 Qb6 28.Rxd8
May-10-18  saturn2: Hm. 27 Qb7 (threatening Bc7) was my
choice too.
27..RxR 28 QxR seems to loose for black.
Apart from that I looked at
27..Rf8 28 Bd8 and white is better.
May-10-18
Premium Chessgames Member
  malt: First impression was to Divert the Queen, for mate in 3

Got 27.Bg5 Rf8 28.Be7 h5
(28...R:b8 29.Q:b8+ Bf8 30.Q:f8# )

29.R:f8+ B:f8 30.Qb8 Kh7 31.Q:f8 Qb6 32.Q:f7+ Kh8

(32...Kh6 33.Bf8+ Kg5 34.Qf4# )
33.Bf6+ Q:f6 34.Q:f6
Missed 27...f6, looks like I've taken the scenic route.

May-10-18  saturn2: Meant 28 Bd6 above
May-10-18  saturn2: <Walter Glatke.. draw, so as 27.Qb7 Qb6 28.Rxd8> is not there 28 QxQb6 instead?
May-10-18  schachfuchs: Took me quiet some time, but I really wanted to solve this and neverov allowed me to give up. So, after discarding 27.Bg5 f6 at the very beginning, I came back there and finally saw that the black Queen is overloaded after 28.Bd2.

Nice puzzle!

May-10-18
Premium Chessgames Member
  takchess: Like nalinw. I proudly played Qa4 and crashed and burned.....
May-10-18  mel gibson: I didn't see that one.

Stockfish 9 says:

27. Bg5

(27. Bg5 (♗f4-g5 ♖d8-f8 ♗g5-e7 h7-h6 ♖b8xf8+
♗g7xf8 ♕b3-b8 ♕a5-c3 ♕b8xf8+ ♔g8-h7 ♕f8xf7+ ♕c3-g7 ♕f7-e6 g6-g5 ♗e7-f6 ♕g7-g8 ♕e6-f5+ ♕g8-g6 ♕f5-d7+ ♔h7-g8 ♕d7xd5+ ♕g6-f7 ♕d5-f5 ♔g8-f8 a2-a4 ♕f7-c4 e2-e4 ♔f8-e8 a4-a5 g5-g4 ♕f5xg4 ♕c4-a6 ♗f6-d4 ♔e8-d8 ♕g4-g8+ ♔d8-c7 ♕g8-f7+ ♔c7-c8 ♕f7xa7 ♕a6xa7 ♗d4xa7 ♔c8-b7 ♗a7-e3) +7.52/30 80)

score for White +7.52 depth 30.

May-10-18
Premium Chessgames Member
  Sally Simpson: Wish I had given this more time.


click for larger view

Got 27. Bg5 and saw 27...f6 soon got busted 28.Bd2 and the d-pawn or the d8 Rook goes with a check.

But 27.Bg5 Rf8 and I could not see the killer 28.Be7 (think I had the pawn on f6 in my mind...getting too old for Thursday to Sunday puzzles.)

So quickly rejected 27. Bg5 and looked at 27.Qb5. This brings all the bits off as after RxR+ and Bh6 Black has Qc5. White then has a free move before taking on f8.

So figured it must be a cute free move allowing WHite to take the IQP and win so and left it at that. This line according to others above appears to be only a draw.

May-10-18  catlover: I went with the win of a pawn by harassing the black queen: 27. Rb5 Qa6 28. Rxd5 Rxd5 29. Qxd5.

Stockfish says it puts white up +1.11, but it sure falls short of 27. Bb5.

May-10-18  lost in space: Missed it
May-10-18
Premium Chessgames Member
  Jimfromprovidence: I looked at 27 Bg5 but I thought that 27...Rf8 28 Be7 Qc7 defended the position as well as double-attacked white's rook.


click for larger view

But white wins nicely after 29 Bxf8 Bxf8 30 Qb4.


click for larger view

May-10-18  Madman99X: Bg5 seems powerful to me, and I think I would have played it on the board, but I confess, I did not see through the end after f6.
May-10-18  cormier:


click for larger view

Analysis by Houdini 4
21...d4 22.Rxb7 Qxc5 23.Bd2 a5 24.a3 Qd5+ 25.Qf3 Qxf3+ 26.Kxf3 a4 27.Ra7 d3 28.e3 Rd6 29.Rxa4 Rc8 30.Ra7 Bc3 31.Rc1 Rf6+ 32.Kg2 Rfc6 33.Bxc3 Rxc3 34.Rxc3 Rxc3 35.a4 d2 36.Rd7 Rc2 37.a5 Kg7 38.a6 Ra2 39.a7 Rxa7 40.Rxd2 Kf6 41.g4 h5 42.gxh5 gxh5 43.f4 Ra8 44.Kf3 Ra3 45.Rd6+ + / = (0.62) Depth: 26

May-10-18  cormier:


click for larger view

Analysis by Houdini 4
20...Rfd8 21.Rfb1 d4 22.Rxb7 Qxc5 23.Bf4 Qd5+ 24.Qf3 h6 25.Bc7 Qxf3+ 26.Kxf3 Rd5 27.R1b5 Rd7 28.Bb8 a6 29.Rxd7 axb5 30.Ba7 h5 31.Rb7 f5 32.Kf4 Bh6+ 33.Ke5 Bg7+ 34.Kd5 Kh7 35.Bc5 Kh6 36.a3 Re8 37.Re7 Rc8 38.Rb7 + / = (0.50) Depth: 26

20...Rfd8 21.Rfb1
+ / = (0.57 --) Depth: 27

May-10-18  cormier:


click for larger view

Analysis by Houdini 4
19...b6 20.Rb5 Qb7+ 21.Rd5 Rfe8 22.Bd2 Rac8 23.e4 Re5 24.Re1 Rxd5 25.cxd5 Be5 26.Rc1 Kg7 27.Rc2 Rxc2 28.Qxc2 Qe7 29.f3 g5 30.Be3 h6 31.Qc4 Kg6 32.Bd4 Bxd4 33.Qxd4 Qf6 34.Qd2 Qe5 = (0.23) Depth: 26

May-10-18  messachess: It's worse for me than missing this one. I couldn't get yesterdays and never looked it up. Any help?
May-10-18  Willber G: <messachess: It's worse for me than missing this one. I couldn't get yesterdays and never looked it up. Any help?>

Here is a link if that's any use:

C Bleis vs K Haznedaroglu, 2005

May-10-18  messachess: Thanks <Willber G>. Of course, I didn't have a chance of getting it. I was trying to study it from 'white to move.'
May-11-18
Premium Chessgames Member
  Richard Taylor: Bg5 was my move but I spent a lot of time on other things such as giving up the Q and forcing off the pieces but I thought that was a draw. Also after Bg5 then Rb5 but I couldn't really make it work.

I saw the Qd5+ idea but I forgot about it and the next time I looked at it I couldn't figure anything out. Not a good day and I am not working things out very well I suppose....

But a nice manoeuvre by White.

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