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Old March 11th 04, 04:02 PM
TruthXayer
 
Posts: n/a
Default Draw(missed win) with IM in a simul

Hi,

Inputs analysis appreciated on this game. I think I had a win but
missed under
time...Anyways I played and looking for improvements for Black game.


(Brief comments in critical junctures added)
[Date "2004.03.10"]
[Result "1/2-1/2"]
[ECO "D45"]
[Time "07:05:55"]
[TimeControl "240"]

1 .d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2 Qc7 7.Bd3 Bb4
8.O-O e5
{Computer analysis rates it as -0.78 for black? Is it that bad?}
9.cxd5 {expected dxe5 which looked better for white} Bxc3 10.bxc3 cxd5
11.Nxe5 Nxe5 12.dxe5 Qxe5 13.h3 {Ba3 would have been uncomfortable for
black..king would have to stay in center for long} O-O 14.Bb2 Qg5
15.Kh1 Qh4 16.Bf5 Ne4 17.Bxc8 Raxc8 18.Kg1 Rc6 19.Qd3 Qg5 20.f3 Nc5
21.Qd4 Re8 22.c4 dxc4 23.f4 Qf6 24.Rac1 Qxd4 25.Bxd4 Nd3 26.Rc2 a6
27.a4 b5 28.axb5 axb5 29.Rb1 b4 30.Kf1 b3 31.Rxb3 cxb3 32.Rxc6 Rb8
33.Ke2 b2 34.Bxb2 Nxb2 35.e4 g6 36.e5 Rd8 37.Rc3 h5 38.g4 hxg4 39.hxg4
Rd4 40.Ke3 Rc4 41.Rb3 Nd1+ 42.Kf3 Rc3+ 43.Rxc3 Nxc3 44.f5 Kg7 45.Kf4
Nd5+ 46.Kg5 gxf5 47.gxf5 Kh7 48.Kh5 Ne7 {Nc7 might still have
some chances but drawn i think} 49.Kg5 Nd5 50.Kh5 Ne7 51.Kg5 Ng8
52.Kh5 Kg7 53.Kg5 Nh6 54.Kf4 Ng8 {} 1/2-1/2
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Old March 11th 04, 10:00 PM
Antonio Torrecillas
 
Posts: n/a
Default Draw(missed win) with IM in a simul

En/na TruthXayer ha escrit:
Hi,
[Date "2004.03.10"]
[Result "1/2-1/2"]
[ECO "D45"]
[Time "07:05:55"]
[TimeControl "240"]

1 .d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2 Qc7 7.Bd3 Bb4
8.O-O e5 9.cxd5 Bxc3 10.bxc3 cxd5
11.Nxe5 Nxe5 12.dxe5 Qxe5 13.h3 O-O 14.Bb2 Qg5
15.Kh1 Qh4 16.Bf5 Ne4 17.Bxc8 Raxc8 18.Kg1 Rc6 19.Qd3 Qg5 20.f3 Nc5
21.Qd4 Re8 22.c4 dxc4 23.f4 Qf6 24.Rac1 Qxd4 25.Bxd4 Nd3 26.Rc2 a6
27.a4 b5 28.axb5 axb5 29.Rb1 b4 30.Kf1 b3 31.Rxb3 cxb3 32.Rxc6 Rb8
33.Ke2 b2 34.Bxb2 Nxb2 35.e4 g6 36.e5 Rd8 37.Rc3 h5 38.g4 hxg4 39.hxg4
Rd4 40.Ke3 Rc4 41.Rb3 Nd1+ 42.Kf3 Rc3+ 43.Rxc3 Nxc3 44.f5 Kg7 45.Kf4
Nd5+ 46.Kg5 gxf5 47.gxf5 Kh7 48.Kh5 Ne7 {Nc7 might still have
some chances but drawn i think} 49.Kg5 Nd5 50.Kh5 Ne7 51.Kg5 Ng8
52.Kh5 Kg7 53.Kg5 Nh6 54.Kf4 Ng8 {} 1/2-1/2


8/5pk1/8/3nPPK1/8/8/8/8 b - - 0 47
wKg5,Pe5,f5/
bKg7,Nd5,Pf7

47...Nb4-c6 followed by Kh6-g5 seems to win for black
(If white plays Kf4-e4-d5 then Ne7 wins)

AT

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Old March 12th 04, 05:09 AM
TruthXayer
 
Posts: n/a
Default Draw(missed win) with IM in a simul

Antonio Torrecillas wrote in message ...
En/na TruthXayer ha escrit:
Hi,
[Date "2004.03.10"]
[Result "1/2-1/2"]
[ECO "D45"]
[Time "07:05:55"]
[TimeControl "240"]

1 .d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2 Qc7 7.Bd3 Bb4
8.O-O e5 9.cxd5 Bxc3 10.bxc3 cxd5
11.Nxe5 Nxe5 12.dxe5 Qxe5 13.h3 O-O 14.Bb2 Qg5
15.Kh1 Qh4 16.Bf5 Ne4 17.Bxc8 Raxc8 18.Kg1 Rc6 19.Qd3 Qg5 20.f3 Nc5
21.Qd4 Re8 22.c4 dxc4 23.f4 Qf6 24.Rac1 Qxd4 25.Bxd4 Nd3 26.Rc2 a6
27.a4 b5 28.axb5 axb5 29.Rb1 b4 30.Kf1 b3 31.Rxb3 cxb3 32.Rxc6 Rb8
33.Ke2 b2 34.Bxb2 Nxb2 35.e4 g6 36.e5 Rd8 37.Rc3 h5 38.g4 hxg4 39.hxg4
Rd4 40.Ke3 Rc4 41.Rb3 Nd1+ 42.Kf3 Rc3+ 43.Rxc3 Nxc3 44.f5 Kg7 45.Kf4
Nd5+ 46.Kg5 gxf5 47.gxf5 Kh7 48.Kh5 Ne7 {Nc7 might still have
some chances but drawn i think} 49.Kg5 Nd5 50.Kh5 Ne7 51.Kg5 Ng8
52.Kh5 Kg7 53.Kg5 Nh6 54.Kf4 Ng8 {} 1/2-1/2


8/5pk1/8/3nPPK1/8/8/8/8 b - - 0 47
wKg5,Pe5,f5/
bKg7,Nd5,Pf7

47...Nb4-c6 followed by Kh6-g5 seems to win for black
(If white plays Kf4-e4-d5 then Ne7 wins)

AT



47.. Nc6 48 f6..(draw) { followed by e6 after Kf5 }
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Old March 12th 04, 10:17 AM
Claus-Jürgen Heigl
 
Posts: n/a
Default Draw(missed win) with IM in a simul

TruthXayer wrote:

Antonio Torrecillas wrote in message ...
En/na TruthXayer ha escrit:

47...Nb4-c6 followed by Kh6-g5 seems to win for black
(If white plays Kf4-e4-d5 then Ne7 wins)

AT


47.. Nc6 48 f6..(draw) { followed by e6 after Kf5 }


No draw. 47...Nb4 48. f6+ Kf8 49. Kf5 Nc6 50. e6 Nd4+ -+
If 50. Ke4 Ke8 51. Kd5 Kd7 -+

Claus-Juergen
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Old March 12th 04, 11:32 PM
Mike Ogush
 
Posts: n/a
Default Draw(missed win) with IM in a simul

On 11 Mar 2004 08:02:15 -0800, (TruthXayer)
wrote:

Hi,

Inputs analysis appreciated on this game. I think I had a win but
missed under
time...Anyways I played and looking for improvements for Black game.


(Brief comments in critical junctures added)
[Date "2004.03.10"]
[Result "1/2-1/2"]
[ECO "D45"]
[Time "07:05:55"]
[TimeControl "240"]

1 .d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2 Qc7 7.Bd3 Bb4
8.O-O e5
{Computer analysis rates it as -0.78 for black? Is it that bad?}
9.cxd5 {expected dxe5 which looked better for white} Bxc3 10.bxc3 cxd5
11.Nxe5 Nxe5 12.dxe5 Qxe5 13.h3 {Ba3 would have been uncomfortable for
black..king would have to stay in center for long} O-O 14.Bb2 Qg5
15.Kh1 Qh4 16.Bf5 Ne4 17.Bxc8 Raxc8 18.Kg1 Rc6 19.Qd3 Qg5 20.f3 Nc5


Perahps a better try would be 20...Rg6. White must respond to the
threatened mate at g2. Trying to defend the g2 square loses material
(21.Qe2 Ng3 or 21.Rf2 Nxf2 or 21.Qc2 Qxe3+) so White must weaken his
kingside further with 21.g4. Black then replies 21...Qh4 once again
threatening mate (Qg3+, Qxh3+, Qg3+, Rh6#). White still has no time
to capture the Ne4. After the relatively best 22.Qc2 Ng5 23.Qc2 Black
can play Re6 anf f5 with a strong attack.

21.Qd4 Re8 22.c4 dxc4 23.f4 Qf6 24.Rac1 Qxd4 25.Bxd4 Nd3 26.Rc2 a6
27.a4 b5 28.axb5 axb5 29.Rb1 b4 30.Kf1 b3


I think that Black can do better than go up a knight for a pawn with
both of black's queenside pawns gone. I would prefer to delay b3
until the rook on the c-file is defended Perhaps 30...Rcc8 with the
idea of either playing ...f5 and advancing the king to help defend the
queenside pawns or if White allows it playing ...Rb8 and ...Rec8
first. I think that white is going to have to sacrifce a rook to get
rid of the knight at d3, but Black should able to retain at least one
of the passed queenside pawns.

31.Rxb3 cxb3 32.Rxc6 Rb8
33.Ke2 b2 34.Bxb2 Nxb2 35.e4 g6 36.e5 Rd8 37.Rc3 h5 38.g4 hxg4 39.hxg4
Rd4 40.Ke3 Rc4 41.Rb3 Nd1+ 42.Kf3 Rc3+ 43.Rxc3 Nxc3 44.f5 Kg7


Now that the rooks are off the board the win should be much clearer.
Black should see what tpes of pawn structure and piece placement he is
aiming for. I think Bkacl easily wins if he obtains
a) a pawn structure where all the pawns are locked except possible the
e-pawn and the knight either occupies or controls the only square
where White has a pawn break on the e-file, or
b) a pawn structure where White's e- and g-pawns are isolated from
each other and the knight prevents the e-pawn from advancing. It is
more favorable if the Black king is directly in front of White's
g-pawn, but it is still an easy win with other configureations of the
g-pawns as long as the White king cannot penetrate on the f-h files.

White is striving to get a postion of typeMake sure his reamining
pawsn are connected. Don't let Black get a passed pawn. Keep the
pawns mobile and not locked up since as soon as there is no
possibility of exchanging Black's last pawn off White is lost.

My natural inclination at move 46 would be to try to prevent White
from exchanging any pawns and to reach alternative a above. So I
would look at 44...g5. My only concern would be whether White could
isolate the g-pawn and win it. Fortunately the White king cannot
approach the pawn at g5 without first dislodging the knight and Black
has just enough tempi to prevent the White king from penetrating:
45.f6 Kf8 46.Ke3 Ke8 47.Kd3 Ne5 48.Ne4 Nf4 49.Kf5 Ne6 and we have
reached a position of type a. Black is winning because he can
gradually force White back and win all of the pawns.

45.Kf4
Nd5+ 46.Kg5 gxf5


46....gxf6 is a critcal mistake, because it allows White to obtain
aposition of type c. Black will no longer be able to win White's
pawns without giving up his own last remaining pawns.

Black wants to force White to exchange since that will isolate White's
two remaining pawns and reach position type b. I think that 46...Nc7
wins here. White has 5 moves:
i) 47.e6 just loses a pawn after 47...fxe6
ii) 47.fxg6 fxg6 and we have reached a position of type b. There
might follow: 48.Kf4 Ne6+ 49.Kg3 Kh6 50.Kh4 g5+ 51.Kg3 Kg6 52.Kf3 f7
53.Ke7 Ng7 54.Kd5 Ne8 and White can no longer hold the e6 square so
Bkack can gradually force White back and win the e and the the
g-pawns.
iii) 47.f6+ Kh7 48.Kh4 Kh6 49.g5+ and we reach a position of type a
once again.
iv) 47,Kf4 and
v) 47.Kh4 can be treated together. Black replies 47...Kh6 and
- if White exchanges with 48.fxg6 fxg6 we reach type b position
- if White moves the King back Black plays Kg5 and wins
- if White plays 48.g5+ Kh7 and now that the g-pawns are imobile
Black maneuvers his king ro e7 or e8 and pentrates through the
center

47.gxf5 Kh7 48.Kh5 Ne7 {Nc7 might still have
some chances but drawn i think} 49.Kg5 Nd5 50.Kh5 Ne7 51.Kg5 Ng8
52.Kh5 Kg7 53.Kg5 Nh6 54.Kf4 Ng8 {} 1/2-1/2




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Old March 13th 04, 12:44 AM
Antonio Torrecillas
 
Posts: n/a
Default Draw(missed win) with IM in a simul

En/na Mike Ogush ha escrit:
45.Kf4 Nd5+ 46.Kg5 gxf5


46....gxf5 is a critical mistake, because it allows White to obtain
a position of type c. Black will no longer be able to win White's
pawns without giving up his own last remaining pawns. (...)

47.gxf5 Kh7 48.Kh5 Ne7 49.Kg5 Nd5 50.Kh5 Ne7 51.Kg5 Ng8
52.Kh5 Kg7 53.Kg5 Nh6 54.Kf4 Ng8 {} 1/2-1/2



Helo Mike,

I proposed (after 46...gf5 47.gf5) 47...Nb4! with the idea Nc6, Kh6-g5
winning ... Don't you agree?

Antonio

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Old March 15th 04, 06:48 PM
Mike Ogush
 
Posts: n/a
Default Draw(missed win) with IM in a simul

On Sat, 13 Mar 2004 01:44:28 +0100, Antonio Torrecillas
wrote:

En/na Mike Ogush ha escrit:
45.Kf4 Nd5+ 46.Kg5 gxf5


46....gxf5 is a critical mistake, because it allows White to obtain
a position of type c. Black will no longer be able to win White's
pawns without giving up his own last remaining pawns. (...)

47.gxf5 Kh7 48.Kh5 Ne7 49.Kg5 Nd5 50.Kh5 Ne7 51.Kg5 Ng8
52.Kh5 Kg7 53.Kg5 Nh6 54.Kf4 Ng8 {} 1/2-1/2



Helo Mike,

I proposed (after 46...gf5 47.gf5) 47...Nb4! with the idea Nc6, Kh6-g5
winning ... Don't you agree?

Antonio



Antonio,

I had not seen your response to the orginal when I made my reply. I
do agree that 47...Nb4! wins for Black. This also meeans that the
final position is won for Black since Black go from the final position
to the one where ...Nb4 wins. After 54...Ng8 White cannot allow
Blac's king to penetrate to h6 so White's move are forced: 55.Kg5 Kh7
56.Kh5 Ne7 57.Kg5 Nd5 58.Kh5 Kg7 59.Kg5 and finally 59...Nb4 and wins.

I think that I have made a mistake in stating that if White can
achieve a position with two connected pawns against Black's one that
he can draw. I now think draws may only occur when White can force
Black's last pawn to come off the board.

Mike Ogush
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