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Evgenij Ermenkov vs Gennadij Germanovich Sagalchik
Primorsko (Bulgaria) (1991)
Italian Game: Classical Variation. Giuoco Pianissimo (C53)  ·  1-0
ANALYSIS [x]

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Nov-24-07  RandomVisitor: 1: Evgenij Ermenkov - Gennadi Sagalchik, Primorsko (Bulgaria) 1991


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Analysis by Rybka 2.3.2a mp up:
(22-ply)
1. ± (1.07): 29.cxb7 Bc7 30.Rf4 Bg2+ 31.Kxg2 Ne1+ 32.Kf1 Nxc2 33.Ne5+ Kh7 34.Bxc2+ g6 35.Rxf6 Rxf6

2. ± (1.07): 29.Rf4 Bg2+ 30.Kxg2 Ne1+ 31.Kf1 Nxc2 32.Ne5+ Kh7 33.Bxc2+ g6 34.Rxf6 Rxf6 35.cxb7 Bc7

Nov-24-07  znprdx: 29. Ng5 dis ch. a) Kh8 30. Rf4
threatens Qh7# ....Bg2+! 31. KxB
....QxN+ 32.KxN
....RxR+ 33.Bc7+
Flip, flop & fizzle arrgghh..........

29. Rf4!! QxR What else?( Perhaps there is a miracle defence – but I presume it will lose a lot of material)30. Ng5 dis ch. Rf7 forced 31.Qh7+ Kf8 32.Ne6+ gets the Q

Aha the “c”pawn may have a final role – but this well beyond my range at 12 ply so I’ll have to set it up and move the pieces

a)... Ke7 33.NxQ RxN 34.Qxg7+

b)... Ke8 33.NxQ RxN 34.Qxg8+
transposes:... Ke7 35.Qxg7+
the queen can pick up the rook at the very least otherwise Black is drawn into a mating web, the prettiest being a kind of ring around the rosy using the c6 pawn in a mating web.

AW SHUCKS FOILED AGAIN ....WOW this is as good as it gets - I saw the Bg2 check but totally missed the now oh so terribly obvious Ne1 fork, how embarrassing, given that I'd found Rf4. This type of position reminds of a wild encounter between Lasker and Napier lost in the moth-balled rummages of what once was my brain:)

Nov-24-07  znprdx: Change that, even better: this is as best as it gets. Great analysis everyone- I'm going have to spend the weekend on this this... I doubt that Sunday will even come close - just kidding there have been some amazingly magical positions in the history of Chess. It is is play like this which explains why grandmasters settle for passed rook pawns or single tempo King positions....
Nov-24-07  SickedChess: what a wild game! got the move in 5 minutes :)
Nov-24-07  znprdx: THANX <CG>!!!
This type of position reminds me of a wild encounter between Lasker and Napier ...Lasker vs W Napier, 1904
Nov-24-07  TrueBlue: very beautiful! Considered the moves without Ng6+, which was the key.
Nov-24-07
Premium Chessgames Member
  DarthStapler: This was a hard one
Nov-24-07  s.ahmed: At first look,
I thought 29.Ng5+ Kh8 30.Re8; which could be easily refuted by 30...Bg2+ and after 31.Kxg2,then either 31...Qxg5+ or 31...Ne1+. However finally I got it and almost the text line, but I would obviously resgine after 30....Ne1+ :-( It looks so hopeless.
Nov-24-07
Premium Chessgames Member
  kevin86: I wonder if this sequence works:

29 ♘xh6+ ♔h8 30 ♘f7+ ♔g8 (if ♖xf7 31 ♖e8#) 31 ♘f7+ ♔g8 32 ♘g5+ ♔h8 33 ♖h4+ ♘xh4 34 ♕h7#.

Black can only stop mate at the loss of his queen.

Nov-24-07
Premium Chessgames Member
  dabbler: Before looking at the solution, I arrived at the same sequence as <kevin86>. Can someone comment how Black can defend?
Nov-24-07
Premium Chessgames Member
  playground player: I had the same solution found by <kevin86> and <dabbler>, beginning with 29.Nxh6+. I couldn't find any way for Black to defend without losing his Queen.
Nov-24-07
Premium Chessgames Member
  Jimfromprovidence: <MostlyAverageJoe> <29. Rf4 Bg2+ 30. Kxg2 Ne1+ 31. Kf1 Nxc2 32. Ne5+ Kh7 33. Bxc2+ g6 34. Rxf6 Rxf6 35. cxb7 Bc7 36. Nd7 Rc6 37. Kg2 and black has a couple of fairly close choices in this position (with ... h5 probably the best).>


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Picking up where <MAJ> left off, can someone check out this line to see if the following continuation produces a win for white?

38 Be4 Ra6 39 b8=Q Bxb8 40 Nxb8 Rxa4 41Bd5


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The above moves seem forced. The position looks somewhat promising to me, but I am far from sure.

Nov-24-07
Premium Chessgames Member
  Jimfromprovidence: To all of you 29 Nxh6 proponents, can’t black just play 31…Rf8, after 30 … Rxf7 31 Re8+ since the queen protects the rook?
Nov-24-07  MostlyAverageJoe: <Jimfromprovidence: To all of you 29 Nxh6 proponents, can’t black just play 31…Rf8>

This is exactly what the black should play to refute 29. Nxh6.

To quote myself: <Tempting double check Nxh6+ accomplishes nothing except removing the black K from the unpleasant location on g8.>

Imagining that the rook is still pinned must be the same kind of the mental block that caused me to dismiss the royal fork administered by the black in the game (the fork does not work in the original position, but does after Rf4).

Nov-24-07  MostlyAverageJoe: <zb2cr> Yes, you're right that the black N can be trapped. One more nail in the coffin.

<Jimfromprovidence> In your continuation, 39.Nc5 might improve white's chances compared to 39.b8=Q.

In any case, this is another of those endgames where engines are of little help, just like the one from last week (Kupreichik vs Sveshnikov, 1986, which I am STILL trying to figure out).

This continuation looks good (with the complete line for reference):

<29. Rf4 Bg2+ 30. Kxg2 Ne1+ 31. Kf1 Nxc2 32. Ne5+ Kh7 33. Bxc2+ g6 34. Rxf6 Rxf6 35. cxb7 Bc7 36. Nd7 Rc6 37. Kg2 h5 38. Be4 Ra6> 39. Nc5 Ra5 40. Ne6 Bb8 41. Nf8+ Kh6 42. Nd7 Ba7 43. c4 Rxa4 44. Bd5


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At this point, Deep Shredder valuation is 2.55 - a quite reliable indication of white's win, much better than the measly 1.00 in the last week's game. Intuitively, it seems a good idea for white to try to keep 2 pawns for a while longer.

Nov-24-07  MostlyAverageJoe: <Samagonka: Like <Confuse>, I'm also confused! What if Qxg6?! White can pick up the rook but that's it then, or what? Fill me in somebody!>

The answer to <Confuse> was provided BEFORE your post.

Perhaps you had too much samagonka on Saturday ?-)

For those wondering what it is aboute: Russian "samagonka" == "moonshine" in English.

Nov-24-07  SAINTAMANT: I see White finishing off Black with
29) Ng5++ Kh8 Rf4!!
if ..QxN RXR checkemate.
Im l correct??
Nov-24-07  SAINTAMANT: l missed the continuation of Bg2+ KXB
Ne1+ Kf1 NxC2
Nov-24-07
Premium Chessgames Member
  dabbler: <SAINTAMANT> Not correct because Black can play 30...Bg2+.
Nov-24-07  goldenbear: I had the main line of this completely worked out in about 30 seconds, whereas I completely missed Tuesday's puzzle. I find puzzles like this much easier than puzzles where there are several good options and you have to figure out which is best. I have no idea why.
Nov-24-07
Premium Chessgames Member
  Jimfromprovidence: <MostlyAverageJoe> <In your continuation, 39.Nc5 might improve white's chances compared to 39.b8=Q.>

<In any case, this is another of those endgames where engines are of little help, just like the one from last week (Kupreichik vs Sveshnikov, 1986, which I am STILL trying to figure out).

This continuation looks good (with the complete line for reference): <29. Rf4 Bg2+ 30. Kxg2 Ne1+ 31. Kf1 Nxc2 32. Ne5+ Kh7 33. Bxc2+ g6 34. Rxf6 Rxf6 35. cxb7 Bc7 36. Nd7 Rc6 37. Kg2 h5 38. Be4 Ra6> 39. Nc5 Ra5 40. Ne6 Bb8 41. Nf8+ Kh6 42. Nd7 Ba7 43. c4 Rxa4 44. Bd5>

I played out your continuation on CM 3000 software (15 years old). The game ended up with a bishop and knight advantage for white and took 40 moves to obtain mate.

Thanks for the assist.

BTW, I respectfully disagree with your position on last Saturday's match.

(Regardless of the value of chess software in helping solve that particular endgame, I believe white wins with correct play after some initial forcing moves. I have made additional posts to that effect).

Nov-24-07  RandomVisitor: After
<29. Rf4 Bg2+ 30. Kxg2 Ne1+ 31. Kf1 Nxc2 32. Ne5+ Kh7 33. Bxc2+ g6 34. Rxf6 Rxf6 35. cxb7 Bc7 36. Nd7 Rc6 37. Kg2 <Kh8>>

1: Evgenij Ermenkov - Gennadi Sagalchik, Primorsko (Bulgaria) 1991


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Analysis by Rybka 2.3.2a mp up:
(28-ply)
1. ² (0.60): 38.a5 Ra6 39.c4 Rxa5 40.c5 Kg7 41.c6 Rb5 42.Ba4 Rb2 43.Bb3 Bd6 44.Nc5 Rxf2+

2. ² (0.36): 38.b8Q+ Bxb8 39.Nxb8 Rxc3 40.Bxg6 Rc4 41.f3 Rxa4 42.Be4 Kg7 43.Nd7 Ra1 44.Kg3 Rg1+

Nov-24-07  MostlyAverageJoe: <Jimfromprovidence: BTW, I respectfully disagree with your position on last Saturday's match.>

Hey, that's OK. I change that position about once every two days :-)

Nov-24-07  MostlyAverageJoe: <RandomVisitor: After <... 37. Kg2 <Kh8>>>

Interesting. Up to 24 plies, Deep Shredder consistently preferred 37... h5. I'll do some sliding on your line.

Nov-24-07
Premium Chessgames Member
  patzer2: <RV> What is Rybka's answer for <29. Rf4 Bg2+ 30. Kxg2 Ne1+ 31. Kf1 Nxc2 32. Ne5+ Kh7 33. Bxc2+ g6 34. Rxf6 Rxf6 35. cxb7 Bc7> 36. Nxg7? Fritz 8 shows 36. Nxg7 is a win (+2.03 at 17 depth) , but apparently Rybka has an answer if it considers 36. Nd7 stronger but only +0.60 advantage at 28-depth!
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