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Amir Mallahi vs Odondoo Ganbold
Asia-chT (1999), Shenyang, rd 5, Oct-13
Vienna Game: Vienna Gambit. Breyer Variation (C29)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jun-05-14  dfcx: oh yes 31. Rxe7+ is better than Ne8+
after 31...Qxe7 (forced) 32. Ne6+ Qxe6 (32...Kf7?? 33. Rxh7#) 33. Qxe6
Jun-05-14  Dr. J: Since 29...Re7 is a failed defense, Black should have played 29...Rxc7 or 29...Qxc7 (though they still lose). With that in mind, how does 29 Ng7 rate? Is it better, worse, or as good as 29 Nc7?
Jun-05-14  gofer: I made him an offer he couldn't refuse...

<29 Ng7 ...>

Black is spoilt for choice; Kxg7, Rxg7, Rxe5, Rf8, Ree7. The problem is that all of them are bad!

29 ... Kxg7
30 Qxh7+ Kf8
31 Qh8+ Kf7
32 Rh7#

29 ... Rxg7
30 Rxe8+ Kf7
31 Rd5

White threatens Rf1+ Qc8 Qe6 and black is completely stuffed!

29 ... Rxe5
30 Qxh7+ Kf8 (Kf7 Ne8+ Kxe8 Qh8+ )
31 Qh8+ Kf7 (Ke7 Qe8#)
32 Rh7 mating

29 ... Rf8?
30 Qxh7+ Kf7
31 Nf5#/Nh6#/Ne8#

29 ... Ree7
30 Qxh7+ Kf8 (Kf7 31 Nf5 )
31 Qh8+ Kf7
32 Nxf5 mating

~~~

Hmmm. I am alone in trying to play the knight to g7 rather than c7. I still think it works fine...

Jun-05-14  M.Hassan: "Medium"
White to play 29.?
White has a Knight for a Bishop.
my feelig is that it should start with a Knight move but where to?, f4, c5 or c7 29.C5 is soon ruled ou since it attacks nothing and no gain can be seen 29.Nf4 can have positive results:
29.............Rxe5
30.Qc8+ Kg7
31.exd5 Qxd5
32.Ne6+
<if...Qxe6 33.Qxe6 and Black queen is lost> 32.............Kf7
33.Rxh7#
But,
this attack can be aborted by:
29.Nf4 Rae7
30.Rxe7 Qxe7
and Black's back rank is safe.
Therefore:

29.Nc7!
<if...Rxe5 30.Qxh7+ Kf8 31.Qh8+ Kf7 32.Rh7#> 29..........Rxc7
30.Rxe8+ Kf7
31.Qxh7+ Kxe8
32.Qg8+ Qf8
33.Qe6+ Re7
34.Qc8+ Kf7
35.Rh7+ Kg8
36.Rh8+ Kxh8
37.Qxf8+
And White wins

Jun-05-14
Premium Chessgames Member
  agb2002: White has a knight for a bishop.

Black threatens 29... Bf5.

The rook on a7 defends h7 and the rook on e8 is defenseless. This suggests 29.Nc7 or 29.Ng7.

In the case of 29.Nc7:

A) 29... Rxc7 30.Rxe8+ Kf7 (30... Kg7 31.Qxh7#) 31.Qxh7+ Kxe8 32.Qg8+ Kd7 (32... Ke7 33.Rxh7#) 33.Rxh7+ Qe7 34.Rxe7+ Kxe7 35.Qa8 + - [Q+P vs R+P].

B) 29... Qxc7 30.Rxe8+ Kf7 (30... Kg7 31.Qxh7#) 31.Qe6+ Kg7 32.Q(R)g8#.

C) 29... Rxe5 30.Qxh7+ Kf8 31.Qh8+ Kf(e)7 32.Rh7#.

D) 29... Re7 30.Qc8+ Kg7 (30... Kf7 31.Rxh7#) 31.Rxe7+ Qxe7 32.Ne6+ Qxe6 (32... Kf7 33.Rxh7#) 33.Qxe6 + - [Q vs B].

E) 29... Rd8 30.Qxh7+ Kf8 31.Qh8+ Kf7 32.Rh7#.

-----

In the case of 29.Ng7:

A) 29... Rxg7 30.Rxe8+ Kf7 31.Qc8 + -.

B) 29... Kxg7 30.Qxh7+ Kf8 31.Qh8+ Kf7 32.Rh7#.

C) 29... Rxe5 30.Qxh7+ Kf8 31.dxe5 Qxe5 32.Qh8+ Kf7 unclear.

-----

I think I'd play 29.Nc7.

Jun-05-14  diagonalley: hmmmm ... i went for 29.N-B7 too, though i didn't manage to find the game line, which (IMO) is pretty difficult to visualise... nice puzzle
Jun-05-14  Madman99X: If 29. Nc7 Rxc7 30. Rxe8+ Kf7 31. Qxh7+ Kxe8 32. Qg8+ Qf8 33. Qe6 Kd8


click for larger view

Where is the win? Black is a piece up. It looks like white would have to play to try to force a perpetual.

Jun-05-14  diagonalley: on another note, yesterday i followed the stavanger tournament via the chessbomb site... plus points were obvious: choice of game to view and prompt board updates (CG MUST do better!!)... however mega-minus point: it appeared that the majority of posters on the chessbomb site had a mental age of about nine... much better class of posts on CG! ... with one notable exception that is...(he who shall not be named)
Jun-05-14  gofer: <agb2002> : <C) 29... Rxe5 30.Qxh7+ Kf8 31.dxe5 Qxe5 32.Qh8+ Kf7 <unclear>.>

29 Ng7 Rxe5

30 Qxh7+ Kf8 (Kf7 31 Nf5+! Kf8 32 Qh8+ Kf7 33 Rh7+ Ke6 34 Qf6#)

31 Qh8+ Kf7 (Ke7 32 Qe8#)

32 Rh7


click for larger view

How does black escape mate from here?

32 ... Rxg5?
33 Ne8+ Ke6
34 Qf6#

32 ... Rf5
33 Qe8#

32 ... Qf8
33 Nf5+ Ke8 (Ke6 34 Qxe5#)
34 Qxe5+ Re7 (Kd8 Qb8#)
35 Rxe7+ mating

Jun-05-14
Premium Chessgames Member
  FSR: 29.Nc7 looks crushing.
Jun-05-14
Premium Chessgames Member
  agb2002: Thank you <gofer>. My 31.dxe5 seems to be a blunder that spoils the attack.

I didn't pay enough attention to 29.Ng7, apparently more or less equivalent to 29.Nc7, because I had already finished the analysis of the latter and was in a hurry to bring my children to school.

Jun-05-14
Premium Chessgames Member
  Chessical: At first I could not see how to progress, then it dawned on me that the key is the unprotected <e8> rook and using this weakness to then exploit the pressure on <h7>. So, let loose the berserker Knight!

<29. Ng7!!> Rxg7 30. Rxe8+ Kf7 31. Qc8 Bf5 32. Rf1 and Black must resign.

Jun-05-14
Premium Chessgames Member
  Once: Interesting. We have a double solution today.

In human mode, I went for 29. Nc7. Block off the seventh rank so that the queen can swoop down with Qxh7+ and general nastiness will happen. Others have covered the variations better than I ever could, so I won't.

I only glanced briefly at 29. Ng7. In human mode it seemed more complicated because of this line: 29. Ng7 Rxg7 30. Rxe8+ Kf7


click for larger view

White has won the exchange and the black king is draughty but h7 is now defended and I couldn't see a quick kill. White ought to be fine here, but it wasn't lifting my skirt the way that 29. Nc7 was.

Switch on Fritzie and he instantly spots 31. Qc8


click for larger view

And that is that. White threatens Rf1+ and Rh8/ Qe8 and it's all too grisly for words.

As to whether 29. Nc7 is better or worse than 29. Ng7, there doesn't seem to be much in it. Both moves are north of +6 so I think we can call them equally valid solutions.

Jun-05-14  morfishine: It took me quite awhile to even find <29.Ng7>, so <gofer> you are not alone

The move <29.Ng7> opens multiple threats comprised of 30.Qxh7+, 30.Rxe8+ & 30.Nxe8

All I could come up with was 29.Ng7 Rxe5 30.Qxh7+ Kf8 31.Rf1+ Bf5 32.Nxf5 Rxh7 (or 32...gxf5 33.Qxa7 Re8 34.Rxf5+) 33.Nxd6+ Ke7 34.dxe5 when White has won a piece, but Black surely has better

Sadly, I never even considered 29.Nc7

*****

Jun-05-14  zb2cr: If the Black Rook were not on a7, White could play 29. Qxh7+ with a quick mate.

So, we stick a Knight in the way with 29. Nc7!

Now, if 29. ... Rxc7; 30. Rxe8+.
Black can keep his position together with 29. ... Re7, though. Now, the White Queen enters decisively : 30. Qc8+!

1. 30. ... Kf7; 31. Rxh7#.

2. 30. ... Kg7; 31. Rxe7+, Qxe7; 32. Ne6+ winning the Queen, as 32. ... Kf7; 33. Rxh7#.

Jun-05-14  Castleinthesky: This was a nice interception puzzle. I realized almost immediately that the black rook needed to be intercepted for white to execute his attack. The only move that could achieve that goal was NC7. Although I did not work through all the possibilities, I could not find a good response for black.
Jun-05-14  Herma48852: Found the 29. Nc7 combo interference/discovered attack tactic quickly where either capture by the R/a7 or Q/d6 of the N/c7 leads to mate. However I missed the defense offered in the game, namely 29.. Re7. I then found 30. Qc8+ Kg7 31. Rxe7 Qxe7 32. Ne6+! Kf7 with the skewer 33. Rxh7+ picking up the black Q/e7.

This puzzle was definitely at the cusp of my tactically challenged chess aptitude.

Jun-05-14
Premium Chessgames Member
  kevin86: I saw the move Nc7 immediately- I didn't see all of the wrinkles however.
Jun-05-14
Premium Chessgames Member
  chrisowen: Guffaw g7 or gleans c7 gamble in fetch a good game off eg gone logs a dank and dusty arch queen magi cone at 4e c1 king could be check off f4 i near eg stoop parch in c8 queen aim f4 act for black a foilable mission gifted it edge in shall sign off at wave real a ship in am gave flop pass over ignoble bread g6 and butter g7 or ergo chest i c7 all good via duck a fane g6 a shrine and blood from a stone g6 do back bond broad gap have gloopy in mire free for a bishop bad pawn a g6 strokes and it yolks why in lights l0 win g6 bishop rever g6 advance aggregates a batch in be hoof e5 cattle knight c7 hatoff lag to huffle shuffle use the aorta g6 health to you sir be down in effetes 8e at effluent rook slide in wheel d6 queen free het upper wary case in back it ploy un-curls am betrothen 29.Nc7 or conga-eel 29.Ng7 win on ride cleric at e4 no use winds again queen d6 eg at e5 flake off emergency for black her countess departs it succinctly query the pitching black d6 off with her head a cinch d6 ay er fed to the wire bus in a ball for light in headed it edacious again ever to feel recess carry on gaeity ha be in the vale a rover d6 up on time black crow 8e mis-place 29...Re7 mate in four alacrity about his business to reference 29...Rxe7 30.Rxe8+ ay in ganes have lovely e7 rise again morn kabbalah of life receive evermore transpire and aspire knight bad rook at e7 reenter eighteen wheeler c8 on the scope f7 ein glorious monarch chasten ai ogle 30...Kf7 31.Rh8 (11.68) queens at have face off by downed it ok f4 a moon shine for black am faith have f5 lights rooks sweep to victory aim flood f1 and f4 cruise over a definer chin h5 again rest f5 case in a g4 trade queens win seat at c7 knight queen as lights fruition have two rook for live bishop sit gone 30.Qc8+ about in cherubim turn off g8 heats lovely coup why ja ship i cobble together bind a hood fang and thorn in his side good batch lincher to pin king forage g7 ballons up close the deal i e6:

rake at stake poetic justice c8 turns the sweet cough cog 30...Kg7 31.Rxe7+ eg free queen retakes and has e8 sown up it ok in often evermore judges have a light winsethigh cane around i wall ace a 31.Ne8+ mate in seven after rook e5 line takes e8 spite have check arm f4 forces too at throw queen off track am c1 at i light swarm oh a g7 mate a moot in letter c8.

Jun-05-14  Chess Dad: I saw 29. Ng7 Rxg7 30. Rxe8+ Kf7 31. Qc8.

I didn't look too long at Nc7.

Jun-05-14  howlwolf: I too went with Ng7 and saw Qc8 Rxg7 30 Re8+ Kf7. On 29 ...Re5 30 Qh7+ Kf7 31 Nf5+ and if Ke6 Qg6+ seems to win the day and if Kf8 Qh8+ is crushing as well.
Jun-05-14  Strelets: 32.Ne6+ Kf7 33.Rf1+ Qf6 34.Rxf6+ Ke7 35.Qd8# worthily concludes the game.
Jun-05-14
Premium Chessgames Member
  thegoodanarchist: Odondoo was done :)
Jun-05-14
Premium Chessgames Member
  Jimfromprovidence: I went with 29 Ng7 as well. You just have to worry about a little trap if black plays 29...Qxe5.


click for larger view

That means protect the knight before capturing the queen.

Jun-06-14  patzer2: Here's a look validated with Fritz 12:

<28...g6?> Black was doing fine up to this point.

Instead 28... Bg6! 29. Nf4 Rae7 30. Nxg6 Qxg6 31. Rxe7 Rxe7 leaves Black with a slight edge.

<29. Nc7!!> This obstruction (a.k.a. interference) tactic proves Black's last move to be a decisive oversight.

<29...Re7>

Hopeless for Black is 29... Rxc7 30. Rxe8+ Kf7 31. Rc8 Rxc8 32. Qxc8 Kg7 33. Qb7+ Kf8 34. Rf1+ Bf5 35. g4 Qe7 36. Qxe7+ Kxe7 37. gxf5 .

<30. Qc8+ Kg7 31. Rxe7+>

Also winning is 31. Ne8+! Rxe8 32. Rxe8 Qf4+ 33. Kb1 Bxc2+ 34. Ka1 Qxg5 35. Rxh7+ Kxh7 36. Rh8+ Kg7 37. Qf8#

<31... Qxe7>

Black resigns in leiu of 32. Ne6+ Kf7 (32... Qxe6 33. Qxe6 ) 33. Rxh7#.

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