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Just a quick thought before I go on holiday. Has anyone looked at 16...Nxc3 17. bxc3 <Nd5!?>

After <17. Bxd6 Re8>, Black threatens ...Nxc3 and ...Rxe2.

Thanks for all your work and effort!

Your summaries help cement the team together.

Your friend in chess, Peter / chesstoplay

1. Nxe4 (<RedOctober>, (henceforth Red); <Kutztown 46> (henceforth Kutz))

Red
20.Nxe4 fxe4 21.Nd4 Qf6 22.f3 e3 23.f4

Question on the evaluation – how is this is a slight plus for white? Black has a potentially dangerous passed pawn. White must deal with the pawn, which leads to lost time. I’m not criticizing, just expressing my confusion

Kutz
20.Nxe4 fxe4 21.Nd4 Ra6 22.f3 exf3 23.Qxf3 Kg8 24.Rc2 Qe7 25.Rdc1 Qd6

Question – on 23. Qxf3.
Why not exf3?
Arguably better as
a. e pawn no longer backwards and so in need of support or defense b. Q still controls a3-f8 diagonal, as well as threatening the black pawn on a5 c. this opens the e file
d. White has 3 pawns on the Kingside, with the potential threat of a pawn storm against the Black King. Which raises the issue – who gets there fastest?

2. Nd4
Kutz,
Nd4 Qf6 21.e3 a4 22.Bf1 Reb8 23.f3 Nxc3 24.Qxc3 Rb6 25.Rd2 Ne6 26.Qa3 Qf8 27.Qd3 Comment on a cute trap. If 22 Nxa4 with the idea of supporting the N with b3, 23…c5!

Inf1N1t
20.Nd4 Qf6 21.Nxe4 fxe4 22.f3 exf3 23.Qxf3 Qxf3 24.Bxf3 Ra6 25.Rd2 Ne6 26.e4 dxe4 I find it difficult to evaluate the position but I don’t see how GMT would play into a game with two isolanis. One on c6 the other on a4

…..Kh8

1. Nxe4 (RedOctober, (henceforth Red); Kutztown 46 (henceforth Kutz))

Red
20.Nxe4 fxe4 21.Nd4 Qf6 22.f3 e3 23.f4

Question on the evaluation – how is this is a slight plus for white? Black has a potentially dangerous passed pawn. White must deal with the pawn, which leads to lost time. I’m not criticizing, just expressing my confusion

Kutz
20.Nxe4 fxe4 21.Nd4 Ra6 22.f3 exf3 23.Qxf3 Kg8 24.Rc2 Qe7 25.Rdc1 Qd6

Question – on 23. Qxf3.
Why not exf3?
Arguably better as
a. e pawn no longer backwards and so in need of support or defense b. Q still controls a3-f8 diagonal, as well as threatening the black pawn on a5 c. this opens the e file
d. White has 3 pawns on the Kingside, with the potential threat of a pawn storm against the Black King. Which raises the issue – who gets there fastest?

2. Nd4
Kutz,
Nd4 Qf6 21.e3 a4 22.Bf1 Reb8 23.f3 Nxc3 24.Qxc3 Rb6 25.Rd2 Ne6 26.Qa3 Qf8 27.Qd3 Comment on a cute trap. If 22 Nxa4 with the idea of supporting the N with b3, 23…c5!

Inf1N1t
20.Nd4 Qf6 21.Nxe4 fxe4 22.f3 exf3 23.Qxf3 Qxf3 24.Bxf3 Ra6 25.Rd2 Ne6 26.e4 dxe4 I find it difficult to evaluate the position but I don’t see how GMT would play into a game with two isolanis. One on c6 the other on a4

Note - I missed this line from <rinus>, my apologies rinus: FWIW
After <19...Kh8>
20.Nd4 Qf6 21.Na4 Nb5 22.Nxb5 cxb5 23.Nc5 Bc6 24.Nxe4 fxe4 25.Qc3 Re6 26.f4 exf3 e.p. 27.Qxf6+ Rxf6 28.Bxf3 Re8 29.Bxd5 Bxd5 30.Rxd5 Rxe2 31.Rc7 Rf8 32.Rxb5 Rd8 33.Kf1 Rxh2 Fruit 2.3.1 : +0.56. Depth: 22. odes: 2305.3 M

3 Na4

Kutz
20.Na4 Rb8 21.Nd4 Nb5 22.Nxb5 Rxb5 23.e3 Qe7 24.Qxe7 Rxe7 25.b3 g5 26.f3 Nf6 27.Kf2 f4

To me this line’s a bit slow. We need to attack along the g and h files. Black’s position has always looked a little breezy IMO, the problem’s always been how to take advantage of that.

3. e3

Kutz
˛ (0.50): 20.e3 Qf6 21.Nd4 a4 22.Bf1 Reb8 23.f3 Nxc3 24.Qxc3 Rb6 25.Rd2 Ne6 26.Qa3 Qf8 27.Qd3

Inf1N1t Rybka doesn't like 22...e3. I think with +0,86/24 at this stage of the game, white has very good winning chances. Inf1N1t: Instead of 22...e3, Rybka suggests:

Kutz
4. ˛ (0.50): 20.Bf1 Qf6 21.Nd4 Reb8 22.e3

20. Nxe4

Red
19..Kh8 20.Nxe4 fxe4 21.Nd4 Qf6 22.f3 e3 23.f4

Inf1N1t: <Red October: 19..Kh8 20.Nxe4 fxe4 21.Nd4 Qf6 22.f3 e3 23.f4>

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Rybka: (+0,86/24) 23...a4 24.Rc3 Rab8 25.Rxe3 Rxe3 26.Qxe3 Rxb2 27.Qa3 Rb8 28.Qxa4 Qd6 29.Qc2 c5 30.Nf3 Rybka doesn't like 22...e3. I think with +0,86/24 at this stage of the game, white has very good winning chances.

And Also these sub-variations

Nov-24-07 Inf1N1t: Instead of 22...e3, Rybka suggests:

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(+0,49/21) 22... exf3 23.Qxf3 Qxf3 24.Bxf3 Ra6 25.Rd2 Ne6 26.e4 dxe4 27.Bxe4 c5 28.Nf3 Bb5 29.h3 (+0,71/21) 22... Nb5 23.Nxb5 cxb5 24.fxe4 Bg4 25.h3 Bxe2 26.Rxd5 Bc4 27.Rd2 Kg8 28.b3 Be6 29.Rc7 (+0,77/21) 22... Ra6 23.fxe4 dxe4 24.Qa4 Nb5 25.Qc4 Qe5 26.b3 Ra8 27.Qc5 Qg7 28.Rc4 Rac8 29.e3

Red October: < kb2ct: If he doesn't play Qf6 followed by an immediate Kh8, GMT stand a very good chance of losing. Not only because he can't play Pa4, but also because the Pg5, Pf4 counterplay doesn't work. btw what took 24 hours to confirm with the laptop took 24 minutes on the quad> I think we should verify this.. I so far feel in the 19..Qf6 line the move to play is 20..Reb8 after 20.Nd4 but the line 19..Qf6 20.Nd4 Kh8 can transpose into some of the stuff I am seeing in 19..Kh8 but this post seems to confirm what I believe in
< imag: <rinus> The reason behind 21.Rc2 is the sequence mentioned earlier by <Tabanus>. 21.Rc2 and if Black plays Kg8,Kh8,h5 or h6
22.Nxe4 fxe4 23.f3 exf3 should give advantage to White.>

KUTZ is the oly player to post other variations, which I give below

6. ˛ (0.40): 20.Qa4 Qe7 21.e3 Rab8 22.Qc2 Na6 23.Bf1 Nac5 24.Nd4 Qf6 25.b3 a4 7. ˛ (0.34): 20.Bh1 g5 21.Nxe4 fxe4 22.Qc3+ Kg8 23.Nd4 Ra6 24.f3 e3 25.Rd3 Qe7 26.Bg2 a4 27.Nc2 8. ˛ (0.32): 20.Bh3 Qe7 21.Qxe7 Rxe7 22.Na4 Ne6 23.Bf1 Rb8 24.Ne5 Nd8 25.Nxd7 Rxd7 26.b3 Kg7 27.f3 Nf6 9. ˛ (0.32): 20.h4 Qf6 21.Nd4 Reb8 22.e3 a4 23.Bh3 Rb6 24.Nxe4 dxe4 25.Bf1 Nd5 26.Rd2 Rab8 10. ˛ (0.27): 20.Ne1

Great job with the analysis, even though I'm not able to judge its correctness. Unfortunately 21...Rb8 was not played, but then now after 21...Nb5 we may have even better chances.

22. Bf1 seems to transpose into 23. e3. That is comments posted indicate that if White plays 22. Bf1 than on move 23 e3 seems indicated. While if White plays 22. e3 then 23. Bf1 is a viable option. (Kutztown46, Thorsson see also Artar1 for an excellent summary of e3 versus Bf1 December 14 2007), given below at the end.

As always my apologies to anyone’s comments which I’ve overlooked. I do assure everyone its inadvertent. Also any mistakes in summaries are mine and mine only. So here goes with my two cents worth

22. Nb6

Forces the line
22 …Ra6 23. Nxd7 Rxd7

At this point white has two separate lines to choose from Line 1
24. Nd4

Line 2
Ne5

Line 1 Analysis from Rhinocerous Ranger December 14 2007

Dec-14-07 Rhinocerous Ranger: Here's my analysis of the situation: 1.<22.Nb6 Ra6 23.Nxd7 Rxd7 24.Nd4 Rc7? 25.Ne6+ > Obviously not best moves for black. 2.< 22.Nb6 Ra6 23.Nxd7 Rxd7 24.Nd4 Rd6 25.Bxe4 fxe426.f4> can't tell just who's ahead here. I think he has a slight advantage because of his superior pawn structure. 3.<22.Nb6 Ra6 23.Nxd7 Rxd7 24.Nd4 Rd6 25.Bxe4 fxe4 26.f3?! exf3 27.exf3 Nxd4 28.Rxd4> with all the minor pieces off the board, neither has a clear advantage. We don't have any isolated pawns, while he has one. His king is safer though.

Line 2 Analysis from Mark Thornton December 15 2007

Dec-15-07

MarkThornton: After <22. Nb6 Ra6 23. Nxd7 Rxd7 24. Ne5 Rd6>

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the computers present us with two very different ways of playing this position: Rybka: <25. f4 a4 26. Bxe4 fxe4 27. a3> Fritz: <25. f3 Ng5 26. a4 Nc7 27. e4> I have to say that I greatly prefer Fritz's method. <25. f4> looks positionally wrong to me. I also like <27. Bf1> at the end of Fritz's line, which I think was suggested by <MostlyAverageJoe>.

This provides Black with two main responses:
Be8 or
Rb8
Rd8 and
Ra7 are also analyzed out

It seems from the analysis that e3 provides a solid basis for moves such as Bf1 or even Nb6 (see above)

Dec-14-07

mckmck: I copied <g.mueller's analysis from main forum> Analysis by Fritz 10: hash = 1024MB
22.e3 Be8 23.Bf1 Rd8 24.h4 h6 25.Kg2 Rb8 26.Bxb5 Rxb5 27.b3 Rbb7 28.h5 Rbc7 29.hxg6 Bxg6 30.Nc5 Bh5 ˛ (0.58) Depth: 21/42 00:25:58 2264mN Analysis by Zappa Mexico : hash = 1024MB
22.e3 Be8 23.Bf1 Ned6 24.Nc5 Rb8 25.a4 Nc7 26.Rd2 Ne4 27.Nxe4 fxe4 28.Nd4 Rb6 29.Rc5 Ne6 30.Rxa5 Nxd4 31.exd4 ˛ (0.67) Depth: 20/46 00:57:37 2682mN Analysis by Deep Shredder 11 UCI: hash = 512MB
22.e3 Rb8 23.Bf1 Nbd6 24.b3 Nb7 25.Ba6 Nd8 26.Nd4 Ng5 27.Nc5 Rb6 28.Bf1 Nge6 29.Ndxe6+ Nxe6 30.Rd2 Kf6 31.Rdc2 Nxc5 32.Rxc5 a4 33.bxa4 Rb4 34.a5 Ra4 ˛ (0.59) Depth: 24/53 01:06:33 5470mN

Dec-15-07

kutztown46: Fritz 10, 23-ply, after 22. e3:

22. Bf1 seems to transpose into 23. e3. That is comments posted indicate that if White plays 22. Bf1 than on move 23 e3 seems indicated. While if White plays 22. e3 then 23. Bf1 is a viable option. (Kutztown46, Thorsson December 14 2007) On the other hand
Dec-14-07

Artar1: I am voting 22.Bf1 with analysis to follow. This move retains a small advantage for White.

Dec-14-07

Artar1: 22.Bf1 works because White threatens to trade off its inactive light-square bishop for Black's more active knight at b5, and in so doing, White retains the initiative. a) 22.Bf1 Be8 23.e3 Rb8 24.Bxb5 cxb5 25.Nc3 Nxc3 26.Rxc3

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Analysis by Deep Fritz 10, move 26@ 20-ply:
1. ± (0.74): 26...a4 27.Rc5 Rd8 28.b4 axb3 29.axb3 Ra7 30.Kg2 Ra3 31.b4 Ra4 32.Nd4 Kf6 33.Nxb5 Rxb4 34.Nc3 Bf7 2. ± (0.80): 26...Rd8 27.Nd4 Kf6 28.Nc6 Bxc6 29.Rxc6+ Re6 30.Rc5 Rb6 31.Rdxd5 Rxd5 32.Rxd5 Ke6 33.Rc5 a4 34.h3 3. ± (0.84): 26...Rbb7 27.Nd4 a4 28.Rc5 Re5 29.Nf3 Ree7 4. ± (0.86): 26...b4 27.Rc5 Ra8 28.Nd4 Bf7 29.Rdc1 Rb7 30.h3 a4 31.Kf1 h6 32.Ke2 b3 33.a3 Re7 5. ± (0.86): 26...Ra8 27.Nd4 b4 28.Rc5 Bf7 29.Rdc1 Rb7 30.h3 a4 31.Kf1 h6 32.Ke2 b3 33.a3 Re7 6. ± (0.96): 26...Bf7 27.Rc5 a4 28.Nd4 Rb6 29.Rdc1 Reb7 30.f3 Kf6 31.Kf2 h6 32.h3 Ke5 33.a3 b) 22. Bf1 Rb8 23. e3 Be8 24. Bxb5 cxb5 25. Nc3 Nxc3 26. Rxc3 <c)22. Bf1 Rb8 23. e3 Be8 24. Bxb5 cxb5 25. Nc3 Nxc3 26. Rxc3 g5 >

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Analysis by Deep Fritz 10, move 26@ 20-ply:
1. (0.65): 27.Bd3 Kf6 28.Re1 Kg7 29.Bxb5 cxb5 30.Nc3 Bf7 31.Ne2 Rb6 32.Nfd4 b4 33.Nc6 Rc7 34.Ned4 2. (0.63): 27.Nc5 Bh5 28.Nd4 Nxd4 29.Rxd4 Be8 30.Ra4 Ra7 31.f3 Rb4 32.Ra3 Nb5 33.Bxb5 Rxb5 3. (0.49): 27.Be2 f4 28.Bxb5 Nxb5 29.exf4 gxf4 30.gxf4 Re2 31.Ne5 Rxa2 32.Nxc6 Rc8 33.Ne5 Rxc1 34.Rxc1 Kf6 35.Nb6 Rd2 4. (0.48): 27.Re1 Ne4 28.Ng1 g4 29.Bd3 Nc7 30.hxg4 fxg4 31.Ne2 Ne6 32.Rh1 Bd7 33.Bxe4 dxe4 5. (0.48): 27.h4 g4 28.Ng1 Nc7 29.Ne2 Ne6 30.Kg1 Ne4 31.Bg2 Bd7 32.Rc2 Ree8 33.Nb2 Kh8 6. (0.46): 27.Rc2 Na3 28.Rc5 Nab5 29.Bxb5 Nxb5 30.Nc3 Kf6 31.Rc1 g4 32.Nd4 Nxd4 33.exd4 Ra8 34.f3 Bd7

Dec-14-07

Artar1: Since 22.e3 can transpose into the lines I have just posted, I will be willing to vote for it if need be.

Dec-14-07

Artar1: I have changed my vote to 22.e3 because it transposes into the type of variations I have posted earlier today. Dec-14-07

Artar1: 22.Bf1 works because White threatens to trade off its inactive light-square bishop for Black's more active knight at b5, and in so doing, White retains the initiative.

I’ve spent several hours looking at these positions. I have chosen the move, which I’ll post later today as I want to mull it over a little more.

After 26.Rc5 Na7 27.Rd2,
27...a4 first instead of 27...Re6 and White has only a slight edge.

Better is 27.Rd4 (Ra4 threat) Nd7 28.Nxd7 Rxd7 29.Ra4 White is better.

Anyway, after 26.Rc5, Re6 first is better than 26...Na7. 26...Re6 27.f4 a4 28.Kf1 h5 29.h3 slight edge for White.

<TheDestruktor: Analysis is still incomplete, but I happened to find a line against 25...Nf6 that, at first glance, looks promissing. I would appreciate if someone could double-check it.> I posted backslide on your mainline, here: Deep Breath chessforum (three consecutive posts).

This move seems inconsistent with <27...a4>, whose purpose must surely be to support the Nb5, by preventing 28. a4 by White.

I propose a more consistent defence for Black, i.e. <28...a3 29. b3 Rb6>

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I think the main point of usefulness in my mind, of this organization task might go towards distinguishing lines that are still considered promising wins, from lines that have been abandoned. For example, only today, 28...Ne4 29. Bg2 has been abandoned as a draw. In order to bring this point out, and narrow the tree down, you might display 'Black's best' lines, w/promising White responses branching off from that. I'm thinking that you've probably already planned on that?

Have you looked at <37...Rc7> 38. Rc5 <Nd3> 39. Rxa5 c5

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White to play his 40th move.

Black threatens c4-c3-c2-c1. The Kg2 makes this threat stronger, as it enables the Nd3 to control the c2 square indirectly. Rxc2 Ne1+ is a recurring theme in the lines that follow:

A) <40. Rb1> [Planning to exchange off the Rc7, the key supporter of the pawn.] 40...c4 and now <41. Rb6+> Ke7 42. Rab5 c3 43. Rb7 Rxb7 44. Rxb7+ Kd6

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White to move. The c-pawn is going to promote.

B) <40. Ra6+> Kg7! and now

B1) <41. Rb1?> c4 42. Rb6 c3 43. Rb7 Rxb7 44. Rxb7+ Kf6

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B2) <41. f5> c4 42. fxg6 hxg6 43. Rff6 Ne5

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White to move.

I would appreciate you adding your thoughts to a discussion which starts here:

kutztown46 chessforum

I'd be willing to help with the summarizing job. I won't be able to guarantee being available every move, but I could help by gathering lines.

As part of <kutztown46>'s new forum system I have developed suggested guidelines for the posting of analysis to the forums in an effort to facilitate and improve the summarization of analyses during the upcoming Umansky game. As part of this process, I used examples drawn from each of you as *models* and have posted them in my forum.

The posts were selected by myself; however, if you do not wish your posts to be used in this manner please let me know. You can find the guidelines by looking at my forum header or by going directly to this link: capafan chessforum