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Nestor Tomas Velez Betancourt vs Fernando Braga
Havana-B (1983), Havana CUB
Nimzowitsch-Larsen Attack: General (A06)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
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Jan-11-13
Premium Chessgames Member
  FSR: White has a brilliant draw la Keene vs D W Anderton, 1977 with 26.Bxg7! Nxg7 (26...Bxg7?? 27.Ne7+ wins the Q; if Black plays some quiet move, Bf6 followed by Nh6+ is strong) 27.Nh6+ Kh8 28.Nxf7+ with perpetual check. Alas, somehow I <don't> think that's the intended solution.
Jan-11-13
Premium Chessgames Member
  FSR: Nice - I saw most of the tactical themes, but missed 28.Qd4!, forcing the unfortunate 28...f6.
Jan-11-13  viking78: I choosed Ne7+, but that lead to nowhere...
Jan-11-13  viking78: thanks FSR for posting game Keene vs D W Anderton, 1977, it's very nice!
Jan-11-13
Premium Chessgames Member
  FSR: <patzer2: Perhaps the move giving the most resistance is 27...Qa4!, when Fritz indicates White must find 28. Be4! to maintain a winning attack.>

Houdini agrees, considering 27...Qa4! Black's best, and 28.Be4!! (+3.40) as White's only good response.

Jan-11-13
Premium Chessgames Member
  FSR: <M.Hassan: "Difficult"
White to play 26.?
White is 2 pawns down.

26.Bxg7 Nxg7
<...Bxg7 Ne7+ and it's a Royal fork> 27.Nh6+ Kh8 28.Nxf7+ Kg8
29.Nxd8 Rxd8
White gave 2 pieces and captured a Rook and 2 pawns, he is technically one pawn behind but since diagonal a2g8 is opened, has chances of getting more material:

30.Rxd5+!! Rxd5
31.Qc4 Rook is pinned
31............Qg6
32.Qxd5+ Nge6
White is ahead now but I can not see an immidiate win.>

Houdini says you were on the right track to an alternate solution. It gives both 26.Nh6+! and 26.Bxg7! as winning, though Nh6+ is about a pawn better (+3.47 versus +2.54). But instead of your 30.Rxd5, which gives a large advantage (+.85), 30.Bxd5+! Rxd5 31.Qc4! is winning for White. Houdini gives 31...Qg6 32.Qxd5+ Nce6 33.h4 (+2.41). Black has no real counterplay, and White will roll his king-side pawns up the board.

Jan-11-13  Bartimaeus: <latebishop, newzild> I came to the same conclusion. After Qg6, Qd4! forces either mate or heavy material loss and is clearly winning. A lovely combination involving multiple concepts.
Jan-11-13
Premium Chessgames Member
  Once: <patzer2> Welcome back! Not seen you for a while. Good to have you around again.
Jan-11-13
Premium Chessgames Member
  morfishine: Too many candidates for this tired brain. Needless to say, I was unable to find the win after candidate #1 <26.Nh6+> 26...gxh6 27.Rxe8 Rxe8 erring with 28.gxh6+ due to 28...Qg6 (instead of the winning 28.Qd4)

Se La vie

Jan-11-13  sushijunkie: Easy week so far until now, for me. Got 26. Nh6+ & 27. Rxe8, but chose other than 28. Qd4. I have to take a big fat ZERO as any other move turns crushor into crushee. Rats.
Jan-11-13  SuperPatzer77: <Morfishine: Se la vie>

Correct French words: "C'est la vie"

LOL

SuperPatzer77

Jan-11-13  snakebyt: Like <FSR> I also tried BXg7 which results in perpetual check if followed by 26 ...NXB then 27 Nh6+ Kh8 28 NXP+ etc... The way it got played in this game Nh6+ left a trail of blood and I didn't want to go down that road.
Jan-11-13
Premium Chessgames Member
  Jimfromprovidence: <patzer2: Perhaps the move giving the most resistance is 27...Qa4!, when Fritz indicates White must find 28. Be4! to maintain a winning attack.>

27..Qa4, below, is a gutsy, clever move because it abandons the defense of g6 as white has the threat gxh6+.


click for larger view

Since he is up material black hopes his threatened ...Qxd1 , which keeps the queen on the d1-h5 diagonal will force a queen trade (or rooks).

<FSR> <Houdini agrees, considering 27...Qa4! Black's best, and 28.Be4!! (+3.40) as White's only good response.>

This a beautiful interference move.


click for larger view

Black cannnot follow with 28...dxe4?? as white has 29 gxh6#

Jan-11-13
Premium Chessgames Member
  kevin86: Nh6+ opens black's position like a can opener.
Jan-11-13
Premium Chessgames Member
  morfishine: <SuperPatzer77> You know, I knew there was something wrong with that spelling, so I Googled it, I got this: 'Se la vie' definition: probably "C'est la vie" tis life

and then I proceeded to type Se La Vie...Duh......

pretty much typical of my week....C'est La Vie

Jan-11-13  SuperPatzer77: <Mofishine> LOL LOL

In French: C'est la vie

Actually, it is pronounced as "Se la vi"

So, "Se la vi" is the pronunciation of "C'est la vie".

C'est la vie in French means that's life or such is life in English

Well, c'est la vie, <Morfishine> LOL LOL

Bonsoir, monsieur

SuperPatzer77

Jan-11-13
Premium Chessgames Member
  morfishine: <SuperPatzer77> As you can see, my French is exceedingly poor. What I know, I picked up working at the French Restaurant in Epcot, 30 years ago.

Parle Francais: 'Skosh'

Au revoir, A bientot!

Jan-11-13  David2009: N Velez vs F Braga, 1983 White 26?

"Cash the draw or play for more?". White is two Pawns down. Try 26.Rxd5 winning one back: if Black declines to capture the Rook White can double Rooks. The critical variation is 26...Rxd5 27.Nh6+ Kh8 28.Nxf7+ and White has at least a draw by repetition. Let's look for more: 26.Nh6+ hxg6 27.Rxd5 h5 and Black can defend. Revisit the first variation: after 28.Nf7 Kg8 29.Qc4 White has a possible Philidor mate if the Rook (which is attacked twice) moves, although Black can protect it with Nc7. White can also prepare the combination with 29.Rxe8 which may work. I do NOT have to decide any of this in the puzzle position: I can start the combination and decide at move 29 whenther to cash the draw or play for more. Time to check:
====
White started 26.Nh6+ so I have missed it. Here's the puzzle position


click for larger view

linked interactively to Crafty End Game Trainer:
http://www.chessvideos.tv/endgame-t....

Alas, my variation loses - Black simply accepts all the sacrificed material and Whitew is soon busted.

Enjoy finding the win starting 26.Nh6+! hxg6 30.Rxe8! as in the game.

Jan-11-13
Premium Chessgames Member
  paulalbert: Got this one seeing the Q on d4 with the B on b2 was devastating as long as the N on e8 defending g7 was eliminated by Rxe8, and rightly avoided gxh6 discovered check since it was met by Qg6. At least occasionally I can still see the essence of some positions.
Jan-11-13  Patriot: White is down 2 pawns.

There are so many candidates--Rxe8, Bxg7, Nh6+, Bxd5, Ne7+

26.Bxg7 (attempting to draw the bishop away from e7) Nxg7 27.Nh6+ Kh8 28.Nxf7+ Kg8 29.Nh6+ draws. This is where knowing the material difference helps, since 29.Nxd8 Rxd8 means white is down 2 pieces for a rook which is generally a bad thing.

26.Nh6+ gxh6 27.gxh6+ Qg6 and I don't see anything else for white.

26.Nh6+ gxh6 27.Rxe8 (so 28.Qd4 has impact) Rxe8 28.Qd4

26.Nh6+ gxh6 27.Rxe8 Qxe8 28.Qd4

Black may have something else on move 27, like 27.Qg6 since it isn't completely forced. This one perplexes me and I've already spent too much time on it.

Jan-11-13  Patriot: I calculated <26.Nh6+ gxh6 27.Rxe8 (so 28.Qd4 has impact) Rxe8 28.Qd4> and even saw that 28...f6 is met by 29.Bxd5+.

Ok, on 27...Qg6 28.Qd4 and I mistakenly thought 28...Bg7 was possible. So 29.f6 Bxd5+ wins.

After 26.Bxg7 Nxg7 27.Nh6+ Kh8 28.Nxf7+ Kg8 29.Nxd8 Rxd8, I didn't see 30.Bxd5+ Rxd5 31.Qc4 .

Jan-11-13  Moonwalker: What is the win from the final position?
Jan-11-13  Patriot: <Moonwalker> 31...Kf7 and I was thinking 32.Qf6+ Kg8 33.Rxd5. Houdini thinks this is a big mistake and that 32.Qxh7+ is easily winning followed by 32...Rxd5. Also the straight-forward 32.Rxd5 wins easily.
Jan-11-13  M.Hassan: <FSR:Houdini says you were on the right track to an alternate solution. It gives both 26.Nh6+! and 26.Bxg7! as winning, though Nh6+ is about a pawn better (+3.47 versus +2.54). But instead of your 30.Rxd5, which gives a large advantage (+.85), 30.Bxd5+! Rxd5 31.Qc4! is winning for White. Houdini gives 31...Qg6 32.Qxd5+ Nce6 33.h4 (+2.41). Black has no real counterplay, and White will roll his king-side pawns up the board.>

Thank you.
Looks like in both lines the winning advantage is attributed to the Queen sitting on c4 and pinning the Rook. Why there are two numbers for the winning advantages? Excuse me but I do not understand it.
Have a great weekend

Jan-12-13
Premium Chessgames Member
  FSR: <M.Hassan: <FSR:Houdini says you were on the right track to an alternate solution. It gives both 26.Nh6+! and 26.Bxg7! as winning, though Nh6+ is about a pawn better (+3.47 versus +2.54). But instead of your 30.Rxd5, which gives a large advantage (+.85), 30.Bxd5+! Rxd5 31.Qc4! is winning for White. Houdini gives 31...Qg6 32.Qxd5+ Nce6 33.h4 (+2.41). Black has no real counterplay, and White will roll his king-side pawns up the board.>

Thank you.
Looks like in both lines the winning advantage is attributed to the Queen sitting on c4 and pinning the Rook. Why there are two numbers for the winning advantages? Excuse me but I do not understand it.>

I'm not sure whether you're talking about (a) the different evaluations Houdini gives of 26.Nh6+! and 26.Bxg7!, (b) the difference between the +.85 that Houdini gives to your line (30.Rxd5) and the higher number (+2.41) it gives to 30.Bxd5+, or (c) the difference between the +2.54 number it gives to 26.Bxg7 and the +2.41 number it gives to the position arising after 26.Bxg7 Nxg7 27.Nh6+ Kh8 28.Nxf7+ Kg8 29.Nxd8 Rxd8 30.Bxd5+! Rxd5 31.Qc4! Qg6 32.Qxd5+ Nce6 33.h4. As to (a), Houdini considers, after analyzing the two moves for a while, that with best play by both sides 26.Nh6+! reaches a position that's 1.0 (equivalent to a pawn, I think) better than 26.Bxg7! As to (b), Houdini's move (30.Bxd5+) leaves White with an exchange more material (a rook rather than a bishop) than your line (30.Rxd5), so it's not surprising that it evaluates its line as 1.56 better than your line.

As to (c), the difference between 2.41 and 2.54 is a function of the point from which Houdini is analyzing the line - is it analyzing the position beginning from 26.Bxg7, or beginning from the position that arises seven moves down the line of what Houdini has tentatively identified as best play after that move (i.e. 26.Bxg7 Nxg7 27.Nh6+ Kh8 28.Nxf7+ Kg8 29.Nxd8 Rxd8 30.Bxd5+! Rxd5 31.Qc4! Qg6 32.Qxd5+ Nce6 33.h4)? Presumably if Houdini had enough time to analyze the two lines to exactly the same depth, and concluded that in fact 26...Nxg7 27.Nh6+ Kh8 28.Nxf7+ Kg8 29.Nxd8 Rxd8 30.Bxd5+! Rxd5 31.Qc4! Qg6 32.Qxd5+ Nce6 33.h4 <was> in fact best play for both sides, the numbers it used for the assessment would be identical.

Similarly, if you gave Houdini a minute to assess the initial position in chess, it might conclude that 1.e4 was best and gave White a +.2 advantage. But if you then gave it a minute to decide on Black's best response, a minute to decide on White's best reply to that move, and so on, you'd probably eventually reach a position that was either a clearly drawn ending, or a draw by perpetual check, with in either case an assessment of 0.00.

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