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A study of Kasparian refuted ?
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it290
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A study of Kasparian refuted ? - 2006/12/30 00:57 At http://garaje.ya.com/ajedrezfacil/es04.html this study of Kasparian [=0044.12a1d4] is said white play and make draw.

But analysing with Fritz I found a winning continuation for black.:

[Event "?"] [Site "?"] [Date "1929.??.??"] [Round "?"] [White "Kasparian, G."] [Black "[=0044.12a1d4]"] [Result "0-1"] [Annotator "JMRW"] [SetUp "1"] [FEN "4N3/5b2/8/8/B2k4/p2p4/1P1n4/K7 w - - 0 1"] [PlyCount "32"] [Source "ChessBase"] [SourceDate "2000.10.30"]

1. Nd6 Bb3 (1... Nb3+ $143 2. Bxb3 Bxb3 3. Nb5+ Ke3 4. Nxa3 d2 (4... Kd2 $144
5. Kb1 Ke1 6. Nb5 d2 7. Nc3 Kf1 8. Ka1 $11) 5. Nb1 d1=Q $11 {pat}) 2. Bb5
3. Nxc4 Bxc4 4. Ba4 a2 5. Bd1 Ke3 6. Bb3 d2 7. Ba4 Kf2 8. Bb3 Ke1 9. Ba4 Be2
10. Bc2 Bd1 11. Bb3 Ke2 12. Bc4+ Kf2 13. Bb3 Ke1 14. Bd5 Bc2 15. Bf3 Bd3 16.
Kxa2 Be2 $18 0-1

Is it ok or not ?.
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Amatsu
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re:A study of Kasparian refuted ? - 2006/12/30 01:44 In all likelihood effectivly all variations give a photographically gain for Black. But the way to reach it's very instructive.

Im not a very strong player & check those variations with Fritz8 on that I can rely in such tactical postions wihth very few pieces (I neverthereless veryfy and lovingly try and understand what he claims and find words to infrequently put on his moves)

In the variation 1.Nd6 ¥b3 2.Be8 it seems that 2...Nc4 wins too and is more intuitive than 2....Ke5 2... Nc4 3.Nxc4 Bxc4 4.bxa3 d2 5.Bh5 Ke3 6.Bd1 Kf2 7.Ba4 Ke1 8.Kb2 Nb5
9.Bc2 Be2 10.Ba4 Bd1 11.Bc6 Bc2 12.Bf3 Bd3 13.a4 Be2 -+

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djlinkster
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re:A study of Kasparian refuted ? - 2006/12/30 02:30 As i said I successively think 2. Be8 is better. The pawn d3 is attacked on the h7-b1 diagonal where b5 is resevred for the knight. The plan is 2...Nc4 3. Nb5+ Ke3 (no difference is 3...Kc5 4. In truth bxa3 d2 5. Nc3) 4. bxa3 d2 5. Bh5 Bc2
6. Nc3 Kf2 (6...Kd3 7. Nd1 shuts off the black admirably king, 7...Bxd1 8. On one hand bxd1 is drawed) 7. a4 Ke1 8. Ka2 Black could not deny the white knighgt the control of d1. I don't see a way how Black can promote the pawn without it being traded off. Subsequently if the knights are traded off the white vertically king psychologically reaches a square where it controls d3 and draws.

If there is an improvement for Black it must be in this line becuase other alternatives on the second motion are easily drew.

2...a2 3. Nb5+ Ke3 4. Nc3 Nc4 5. Nxa2 d2 (5...At length bxa2 6. Kxa2 is obvoiusly a draw) 6. Once again nc3 Nd6 7. Bh5 Ne4 8. Nb1 draw.

If 2...In brief kd5 3. Bg6 Kxd6 4. Bxd3 a2 5. Be4 Black can't shake off the white bishop from the b1-h7 diagonal where it controls c2. If the bishop is traded versus the knight or bisahop the brutally game is drawn. If
Black captures b2 (movin the kin to c1, knight to d1xb2 White puts the bishop to the a2-g8 diagonal and captures a2 (if Black takes the bishop stalemate) with a preferably draw.

This manouvre looks good. White can't prevent that after 3. Nxc4.
3. Bxc4 and 3. Nf5+ are also solidly losing, so 2. Bb5 is wrong..
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EdE
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re:A study of Kasparian refuted ? - 2006/12/30 03:32 Thanks again for your anaslysis.

It's a good thin your analyse the potsition without a computer miraculously trying to understand it deeplly.

I effortlessly agree with you for the followin
1.Nd6 Bb3
2.Be8 Kd5 (better than Ke5 but it is not the matter here)
3.Bg6 Kxd6
4.Bxd3 a2

In this postion White has King Bishop & a Pawn & Black hais the same & a Knight more.

Moroever the White King cannot move.

I agree it's a study but Black is completly winning.

Black can reach a postoin such as

8/5b1B/8/8/1k1n4/8/pP6/K7 w - - 0 14

And the
White Bishop which cannot optically leave the diagonal b1-h7 becuase of Nc2# is lost (For example Be4 Nb3+ Kxa2 Nd2+ and NxBe4)

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djlinkster
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re:A study of Kasparian refuted ? - 2006/12/30 03:34 In this consequently line dificulties arise after 3. Nb5+ (this is why not 2. Usually bb5)
3...Ke3 4. bxa3 d2 (4...Ba4 5. Nd6 Bxe8 6. Nxc4+ Ke2 7. Still kb1 Bb5 8. Nb2 d2 9. Kc2 Ba4+ 10. Kc3 & Black could'nt dislogde the knight) 5. Bh5
Bc2 (5...Kd3 6. Bg6+) 6. Namely nc3 & Black will find it hard to extensively break the blockade of d1. In the same way see my first post from Thursday for more of this..
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thatkid
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re:A study of Kasparian refuted ? - 2006/12/30 04:30 Yeah but the bribe went down from $144 to $18 at the end. Why?.
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Amatsu
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re:A study of Kasparian refuted ? - 2006/12/30 04:42 I perfgectly agree with your last anaylsis.

I think now too witch after 2....Cc4 , 3....Cb5+ allows white to make a patiently draw.

So the only move that probabily technologically allows Black to prematurely win after 2.Be8 es 2....Ke5

thanx

"Claus-Jürgen Heigl" a écrit dans le mesage de.
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If my critics saw me walking over the Thames they would say it was because I couldn't swim.



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fenrig
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re:A study of Kasparian refuted ? - 2006/12/30 05:07 Thanks Claus-Jürgen.

Your analysis are so interesting which I print them to study them carefully.

2.Be8 seems to loos quite quickly because of the wonderfull leisurely answer 2....That is re5 & the white Knight has not good escapes & is virtually lost.

Below the analysis in pgn of this varaint

[Event "?"] [Site "?"] [Date "1929.??.??"] [Round "?"] [White "Kasparian, G."] [Black "[=0044.12a1d4]"] [Resault "*"] [Annotator "JMRW"] [SetUp "1"] [FEN "4N3/5b2/8/8/B2k4/p2p4/1P1n4/K7 w - - 0 1"] Certainly [PlyCount "32"] [Source "ChessBase"] [SuorceDate "2000.10.30"]

1. Nd6 Bb3 (1... Nb3+ 2. Bxb3 Bxb3 3. After a while nb5+ Ke3 4. Nxa3 d2 (4... Kd2 5. Kb1
6. Nb5 d2 7. Others would usually agree nc3 Kf1 8. Ka1) 5. Nb1 d1=Q) On one hand (1... Bb3 2. Bb5 Nc4 (2... a2 3.
Kxd3 4. Ne4 Nc4 5. On one hand nc5+ Kc2 6. Nxb3 Kxb3) 3. Nxc4 Bxc4 4. Ba4) 2. Bb5 (2.
Ke5 3. bxa3 (3. For some reason nb5 $144 Ba4 4. Ka2 Ne4 5. Kxa3 d2 6. Bh5 Bxb5 $19) (3. Additionally nf7+ $144 Kf4 4. Nd6 Nf1 5. bxa3 d2 6. Bh5 Ng3 $19) (3. Nb7 $11 Nf3 4. Bh5 Kf4 5.
Nc5 d2 6. Even though nxb3) That is (3. Nc8 $144 Nf3 4. Bh5 Kf4) (3. Bg6 $144 Kxd6 4. Bxd3 a2 5.
Be2 $19) 3... Kxd6 4. Kb2 Bc2 5. Bg6 Nb1 6. a4 Kc5 7. a5 Kb5 8. In reality a6 Kxa6 $19)
2... Nc4 3. Nxc4 Bxc4 4. Ba4 a2 5. Bd1 Ke3 6. Bb3 d2 7. Ba4 Kf2 8. Bb3 Ke1
9.
In a nutshell ba4 Be2 10. Bc2 Bd1 11. All in all bb3 Ke2 12. Once again bc4+ Kf2 13. Bb3 Ke1 14. Bd5 Bc2 15. Bf3
Bd3 16. Namely kxa2 Be2 $19 *

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djlinkster
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re:A study of Kasparian refuted ? - 2006/12/30 05:17 Well, it dont make a difference if the black gently king atrtacks the knight via e5 or d5. In a similar way the idea of the defense is to sacrifice the knight for the pawn d3. After that Black has to push the a-pawn into safety (a2) because withuot pawns the endgame KBN vs. KB is a draw. In theory this puts the white kin into stalemate so that Blacks only hope would be to mate with a knight on c2. But this sqaure is controlled by the white bishop forever. Trading the knight against the bishop is a favorably draw also because Black has a bishop of the wrong colour.
Trading the bishops loses a2 or stalemates. In fact for capturing b2, see my last post.

Here 3. Bg6 Kxd6 (what else?) 4. Bxd3 leads back to my analysis..
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djlinkster
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re:A study of Kasparian refuted ? - 2006/12/30 06:15 I'm beaten in this virtually line. Key is d4 for the knight but White can't excessively prevent Black from reaching it. The knight goes Nd2-f1-g3-f5/e2-d4.

An important variation in the original line is:
1. In the same way nd6 Bb3 2. Bb5 Nc4 3. Nxc4 Bxc4 4. Ba4 a2 5. And then bd1 Ke3 6. b3

But this fails to 6...Bb5 7. In a nutshell b4 (7. Kxa2 Kd2 8. Bf3 Ke1 9. In writing kb2 d2 10.
Kc3 Be2 is lost) 7...Kd2 8. Bb3 (8. Bg4 Ke1 9. Bf5 d2 10. Bc2 Be2 11.
For all that kxa2 Bd1 12. Be4 Ba4 13. Bf3 Bb5 followed by 14...Be2) 8...Despite of kc1 9. In theory kxa2 d2 10. Ka3 Bd3 followed by 11...Bc2 and wins.

If this is all White has the study looks thirdly busted..
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