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Lev Psakhis vs Vladimir P Malaniuk
URS-ch54 (1987), Minsk BLR, rd 15, Mar-??
Spanish Game: Closed Variations (C84)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jul-17-10  lost in space: 26. Nxg7!
(26. Nh6? (my thirst thought) 26...gxh6 27. Qd2 Nd5! 28. Re1 Nc4 29. Rxe6 Nxd2 30. Rxc6 Nxb4 and Black is fine)

26...Kxg7
(26...Qe7 27. Qd2 1:0)

27. Qd2 Kf8
(27...Re8 28. Qg5+ Kf8 29. Rd1 Nfe4 30. Qg7+ Ke7 31. fxe4 Qg6 32. Qxg6 fxg6 33. Be5 Rd8 34. e5 Ke8 35. Bxd6 1:0)

28. Qh6+ Ke7 29. Qh4 Kd7
(29...Rg8 30. Re1 Nde8 31. g4 h5 32. Bf5 Bxf3 33. Bxe6 fxe6 34. g5 Nd7 35. Rf1 1:0)

30. Bxf6 Re8 31. Bxh7 Kc8 32. Qg5
(32. Rc1?? Qe3+ 0:1)

32...Kb7 33. Rc1 Nc4 Bd4 1:0

Time to check

Jul-17-10
Premium Chessgames Member
  kevin86: White sac-ed the knight to gain a tempo,and then pin black's strongest defender,the knight.
Jul-17-10
Premium Chessgames Member
  al wazir: <ajk68: after 27. Qd2 h6 28. Re1 the black Queen is forced to leave protection of the knight of f6. 29. Bxf6!>

Right. 27...Ne8 takes care of one threat and 27...h6 takes care of the other, but there's no way to defend against both.

Thanks.

Jul-17-10
Premium Chessgames Member
  Jimfromprovidence: I got the same line as <beveniste> and <lost in space> through move 28, <26 Nxg7 Kxg7 27 Qd2 Kf8 28 Qh6+ Ke7>, then I got stuck.


click for larger view

I could not figure out a way for white to gain back material, so I ran the position through Rybka freeware. It found the quiet but winning 29 Qh4!.


click for larger view

This move keeps the double attack and pin on the f knight, but the difference maker is that the queen now guards e1, so 30 Re1 pinning the queen is an immediate threat.

Black is now forced to "unguard" the f knight with 29 Kd7, allowing 30 Bxf6.

Jul-17-10  scormus: Did I miss a day?
Jul-17-10  zb2cr: Missed, missed, missed. No thought of 26. Nxg7 entered my head.
Jul-17-10  lost in space: <<al wazir> wrote (snip): But after 27. Qd2 h6, how does white win?>

27. Qd2 h6 28. Re1 and Black will lose material

Jul-17-10  CHESSTTCAMPS: White has two bishops for B+N in this middlegame attacking position; otherwise material is even. Two bishops on adjacent diagonals aimed at the enemy king position in an open position often create multiple attacking posibilities. On first inspection of the position, I was immediately interested in the g7 target, noting that black would be tied up by a nasty pin. After looking for other lines of play to attempt to pick up a loose piece at c6 or d6 (which seemed to result in drawish exchanges) I decided to go with my first idea:

26.Nxg7

The gain of tempo by attacking the Qe6 is an important advantage of this move. Acceptance of the sac is virtually forced. From here I liked 26... Kxg7 27.Qd3 (with the nasty threat of 28...Qxh7+) Rh8 28.Qc3 Nc4 29.Re1 (Mobilizing the white forces with gains of tempo) Qd6 30.Bc4 Qf4 (Qd8? 31.Be7)

Here I hit my time limit. I think the right idea is Kf2 followed by a g-pawn push, but this is not a properly completed solution. Let's see what Psakhis came up with...

Jul-17-10  CHESSTTCAMPS: I looked at 27. Qd2 and I'm not sure why I rejected it, but it may have been 27... h6 28.Rd1 Nc4, overlookng that 29.Rxe6 Nxd2 30.Rxc6 wins.

Going for looks instead of following the analysis to conclusion, I guess - not a good idea.

Jul-17-10  M.Hassan: I only did the move 26 right and could not reach a decisive advantage for white!
Jul-17-10
Premium Chessgames Member
  doubledrooks: I saw 26. Nxg7 Kxg7 27. Qd2 h6 28. Re1 Qd5 29. Bxf6+ Kxf6 30. Qh6#

However, after 26. Nxg7 Kxg7 27. Qd2 Ne8 28. Re1 Qd5, I missed the obvious 29. Be4.

Aargh!

Jul-17-10  BOSTER: <Shamot> <when I look at these puzzles I automatically start considering the moves which I would not consider during a OTB game>. I am the direct opposite. I interpret such position like read games,not puzzles.
Jul-17-10  dregoz: Nice One ! Interesting Nxg7! I never been play but most time I 've been played Bxh7 and Rxf6.
Jul-17-10  wals: I opted for 26.Nxd6, which is much weaker than the text move.

Rybka 3 shows Black didn't help its cause with the blunder 27...Nde8,+ 6.98. Kf8 would have prolonged the agony.

Jul-17-10
Premium Chessgames Member
  DarthStapler: I didn't get it
Jul-18-10  jheiner: <johnlspouge wrote: White has the Horowitz B pair bearing down on the Black K-side...>

Hadn't heard of the Horowitz Bishops before. From context, I take it that is the B pair bearing on the a1-h8 and b1-h7 diagonals respectively. Or is it more specific than that?

Just last week, I ran into the term Lopez Bishops, pertaining to the B pair bearing on the b1-h7 and c1-h6 diagonals respectively -- a position reached commonly in the Ruy Lopez with the pieces on c1 and c2. J M Hanham vs Steinitz, 1894

Aug-01-19
Premium Chessgames Member
  al wazir: My response was exactly the same as it was the first time this position appeared. I could repeat what I posted then word for word, and it would be just as true as it was then.
Aug-01-19  mel gibson: I wasn't sure -
I didn't see a knockout blow.

Stockfish 10 agrees with the first few moves:

26. Nxg7

(26. Nxg7 (♘f5xg7 ♔g8xg7 ♕d1-d2 ♔g7-f8 ♖a1-e1 ♘f6-e4 f3xe4 ♘d6xe4 ♕d2-f4 ♖a8-d8 ♗d4-e5 ♖d8-e8 ♗c2xe4 ♕e6xe5 ♕f4-h6+ ♕e5-g7 ♕h6xc6 ♕g7-d4+ ♔g1-f1 ♖e8-e5 ♕c6-h6+ ♔f8-e7 a2-a3 ♖e5-e6 ♕h6-g5+ ♕d4-f6+ ♕g5xf6+ ♖e6xf6+ ♗e4-f3+ ♔e7-f8 ♖e1-c1 ♖f6-d6 ♔f1-e2 ♔f8-e7 ♔e2-e3 ♔e7-e6 ♖c1-c7 h7-h6 ♖c7-c5 ♔e6-d7 ♗f3-d5 ♖d6-g6 ♔e3-d4 h6-h5 ♗d5-e4 ♖g6-h6 ♔d4-e5 h5-h4 ♔e5-f4 ♔d7-e7 ♖c5-c7+ ♔e7-f8 ♗e4-d5) +6.51/39 180)

score for White +6.51 depth 39

Aug-01-19
Premium Chessgames Member
  Sally Simpson: ***


click for larger view

Got it very quickly, (not the entire win, the Nxg7 idea) aided by one of the must know motifs in every players book of tactical patterns.

If there is Knight on f6/h6 and it can only work with a Knight - and you can get a Queen to g5 with a check. Sac on g7.


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Psakhis takes it up the notch but the underlying theme is there. Your job was to pick it out from a crowd of bland faces.

This one was smiling in the foreground bringing back pleasant and not so pleasant memories. I fell for it once in a tournament OTB game after knocking back a draw, but this one counters that one.

G Chandler vs P Roberts, 1990


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White to play

***

Aug-01-19  saturn2: I saw 26. Nxg7 Kxg7 pinning the Nf6

Then I was not sure and had the game idea 27 Qd2 followed by Re1 as well as 27. Qd3 with

27...Rh8 28. g4 h6 29. Qc3 Bb7 30. Re1 white wins back the piece with a hopefully a better position.

Aug-01-19  Momentum Man: I didnít solve this one. Cue the Debbie Downer sounds
Aug-01-19
Premium Chessgames Member
  agb2002: White has the bishop pair for a bishop and a knight.

Black threatens Nxf5.

White can attack the black king with 26.Nxg7 Kxg7 (26... Qe7 27.Qd2 as in the main line) 27.Qd2:

A) 27... h6 28.Re1

A.1) 28... Qd5(d7,xa2) 29.Bxf6+ wins (29... Kxf6 30.Qxh6#; 29... Kf8 30.Qxh6+ Kg8 31.Qg7#; 29... Kg8 30.Qxh6 and mate soon).

A.2) 28... Nde4 29.Bxe4 recovers the piece (the knight on f6 is pinned) with an extra pawn while keeping the attack.

A.3) 28... Be4 29.Bxe4 as above.

B) 27... Nde8 28.Re1

B.1) 28... Qd5 29.Be4

B.1.a) 29... Qd6 30.Qg5+ Kh8 (30... Kf8 31.Bc5 wins decisive material) 31.Be5 Qd7 32.Bxc6 Qxc6 33.Rxe8+ Rxe8 34.Bxf6+ wins decisive material.

B.1.b) 29... Qd7 30.Qg5+ Kf8 (30... Kh8 31.Bxf6+ Nxf6 32.Qxf6+ Kg8 33.Bxc6 wins a piece at least.

B.2) 28... Qd6 29.Qg5+ Kh8 (29... Kf8 30.Bc5) 30.Rxe8+ as above.

B.3) 28... Qd7 29.Qg5+ Kf8 (29... Kh8 30.Rxe8+ as above) 30.Bc5+ Nd6 31.Qxf6 looks winning.

C) 27... Kf8 28.Re1 followed by Qh6+ looks winning. For example, 28... Qd5 29.Qh6+ Kg8 30.Bxh7+ and mate next.

Aug-01-19  cormier:


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Analysis by Houdini 4 d 26 dpa done

1. + / = (0.47): 24...Qd8 25.a4 g6 26.Bb3 Ne8 27.Ne4 Bxe4 28.fxe4 Rc8 29.Bc5 Qf6 30.Bxc4 bxc4 31.Rc1 Rd8 32.Qf1 Qe6 33.Rxc4 Nf6 34.Rd4 Rxd4 35.Bxd4 Nxe4 36.Qf4 f6 37.b5 axb5 38.axb5 Qd5 39.Qb8+ Kf7 40.Bb2 Qd1+ 41.Kh2 Qd6+ 42.Qxd6 Nxd6 43.b6 Ke6 44.g4 Nb7 45.Kg3 Kd5 46.Bxf6 Kc5 47.Kf4 Kxb6

2. + / = (0.48): 24...Qg5 25.Nf5 Bd7 26.h4 Qf4 27.Ne7+ Kh8 28.Qd3 Ne5 29.Qe3 Qxe3+ 30.Bxe3 Re8 31.Bc5 g6 32.Re1 Nc6 33.Kf2 Nxe7 34.Rxe7 Rxe7 35.Bxe7 Nd5 36.Bc5 Kg7 37.g3 Kf6 38.Bd4+ Ke6 39.a3 Kd6 40.Ke2 f6 41.Bb3 Kc6 42.Ba2 h5 43.Kf2 Bc8 44.Bb3 Kd6

3. + / = (0.63): 24...Re8 25.Bxf6 gxf6 26.Qxd5 Bxd5 27.Kf2 Re5 28.f4 Re6 29.Bb3 Ne3 30.Nf1 Bxb3 31.Nxe3 Bc4 32.Rd1 h5 33.a4 Rc6 34.Rd4 Kf8 35.Nf5 Rc8 36.Nd6 Rc6 37.Kf3 Ke7 38.Nf5+ Ke8 39.axb5 Bxb5 40.Ng7+ Ke7 41.Re4+ Kd7 42.Nxh5 f5 43.Re3 Rd6

Aug-01-19  King.Arthur.Brazil: It seems to me that 26.♘xg7 ♔xg7 27.♕d2 is somewhat expected because White needs the ♖ to control the E column for mate intentions. As consequence of the black moves, 29.♗e4! is a previsible excelent move, it attacks ♗, ♕ and indirectly the ♖ at a8 and prepares the final strike, as the black ♕ cannot protect g5 anymore. Then you see the possible black last moves: 29... ♕d7 30.♕g5+ a) ♔h8 31.♗xc6 ♕xc6 32.♖xe8+
♖xe8 33.♗xf6+ ♕xf6 34. ♕xf6+ ♔g8 35.♕xa6...
b) ♔f8 31.♗c5+ ♘d6 32.♗xc6
♕xc6 33.♕xf6 (with threat 34.♕h8#.), 33...♔g8 34.♗xd6... If black tries 29...♕d6, ♕e6 or ♕c4 then 30.♗xc6 ♕xc6 31.♕g5+ ... leads to the same lines presented before. And there is no Bronstein's move, like 9...♖d8 30.♗xd5 ♖xd5 31.♖xe8 ♗xe8 32.♗xf6+ ♔xf6 33.♕xd5... easy!
Aug-01-19  cormier:


click for larger view

Analysis by Houdini 4 <d 28 dpa done

1. + / = (0.33): 23...Qg5> 24.h4 Qd5 25.f3 Qd8 26.Nf5 Bd7 27.Bc5 Bxf5 28.Qxd8+ Rxd8 29.Bxf5 g6 30.Be7 Rd2 31.Bxf6 gxf5 32.a4 bxa4 33.Rxa4 Rd6 34.Be7 Re6 35.Bc5 Ne5 36.Ra3 f4 37.g3 fxg3 38.Kg2 Kg7 39.f4 Nc4 40.Rd3 Rg6 41.f5 Rg4 42.Rxg3 Rxg3+ 43.Kxg3 Kf6 44.Kf4 h5

2. + / = (0.38): 23...Qd5 24.f3 Qg5 25.Nf5 Re8 26.h4 Qf4 27.Bxf6 gxf6 28.Qd4 Qxd4+ 29.Nxd4 Bd7 30.Rc1 Kg7 31.Kf2 Nb2 32.Nf5+ Bxf5 33.Bxf5 Rd8 34.Rc6 Rd2+ 35.Kg1 Rd1+ 36.Kh2 Nc4 37.Rxa6 Rd4 38.a3 Rxh4+ 39.Kg3 Rd4 40.Be4 Nd6 41.Kf4 Nxe4 42.fxe4 Rd2 43.Ra5 Rf2+ 44.Kg3 Ra2 45.Rxb5 Rxa3+ 46.Kf4 Ra2

3. + / = (0.38): 23...Qf4 24.Nf5 Be4 25.Ne7+ Kh8 26.Bxe4 Nxe4 27.a4 Ned2 28.Be3 Nxe3 29.Qxd2 Qe5 30.Re1 Qxe7 31.Rxe3 Qd8 32.Rd3 Qe8 33.a5 h6 34.Rd6 Qe5 35.g4 Kg8 36.Kg2 Qe4+ 37.f3 Qe7 38.Kg3 Qe5+ 39.f4 Qe7 40.h4 Qe4

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