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Alexei Dmitriyevich Fedorov vs Zigurds Fridrikhovich Lanka
EU-chT (Men) (1997), Pula CRO, rd 8, May-??
Sicilian Defense: Velimirovic Attack (B89)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Nov-09-08  piever: A brief summary of my ideas when I decided to look at the solution: 19. g6?! fxg6! unfortunately is just bad for white (e6 is protected so Bxe6 is not possible, the queen is en prise and so on). 19. Nxg7 Kxg7 20. Bd4+! Kg8 21. Qh6 e5 22. g6 (which now is stronger that at the 19th move) is crushing. Of course 19..Kxg7 is not forced, but if black doesn't take the knight white can simply play Qh6, retreat the knight and threaten mate on g7.

This would be more than enough to convince me to play it OTB, but I would have needed:

1) to reach this position as white

2) somebody that tells me: 19.? White to play and win

3) enough time on the clock

Anyway impressive game by white: at the 13th move the knight sac on f5 for positional compensation (d5 square for the other knight and open g file) is really excellent!

Nov-09-08
Premium Chessgames Member
  mike1: ok-got Nxg7 but the game cannot be
the real test. Dont have software to check but the main line should be exd5 allowing Nfe6 to defend g7.
could anybody check this please?
dont think the game is clearcut.
Nov-09-08
Premium Chessgames Member
  Marmot PFL: Black seemed intimidated by white's attack and probably had to play exf5 at some point, for instance after 15.g5 ef5 although 16.ef still gives white an attack.
Nov-09-08  tallinn: <mike1> Well, to defend with Bxd5 was Rybka 2 choice as well. So the line played in the game is not that bad.

The suggested exd5 is answered with Nf5 and then it is mate in all lines (threat Nh6+, Nxf7 and Bd4). Nfe6 does not work (Qxh7!), and Nce6 is met by Nh6+ Kh8 (Kg7 Qxf7+ Kh8 Qg8#) Qxf7 Ng6 Nf5 Ngf8 Bd4+ and mate soon.

Nov-09-08  Sularus: i got white's first three moves. haha!
Nov-09-08
Premium Chessgames Member
  beenthere240: In my analysis, I figured 19. Nxg7 was right, but missed 19...Bxd5. At first I was in dispair since I had assumed the sac wuld be accepte. I finally found the Qh6 -- Nh5 idea, which forces black into lines that also force winning replies.
Nov-09-08  znprdx: Like <DoubleCheck:I didn't think 19. Nxg7 was forcing 'enough' considering the amount of material white has already en prise >I'm not convinced.The spoiler to the text move ...19.N(c)d7 is pretty double-edged

20.Bxe6 Ne5 21.f4 Bxe4! 22.fx[N]e5 Bg6 one variation might be: 23.Qh6 b4! 24.Bb3 bx[N]c3 25.bxc3 Qxc3 26. Bd4 Qc7

Nov-09-08  Ingolf: I tried 19.Bd4 with the idea Bxd5 20.Qh6 which I thought forced mate (gxh6 21.Nxh6#). I had overlooked 20.- Bxg5 <check> 21.Qxg5 f6 covering g7. This position is still great for white though, about +1 according to Fritz. After 22.Qxg7+ Qxg7 23.Nxg7 Kxg7 24.exd5 e5 25.Be3, White is going to control the g-file and has much more active pieces.
Nov-09-08
Premium Chessgames Member
  playground player: What I don't get is why Black doesn't snap up the sacrificial Bishop after 14. Bd5. I know, I know: "Beware the Greeks bearing gifts." But I don't see how Black gets hurt by 14...exd5.
Nov-09-08
Premium Chessgames Member
  agb2002: The move I find most interesting is 19.Bd4 threatening 20.Qh6:

A) 19... exf5 20.Qxf7+ Kh8 21.Qg8 mate.

B) 19... e5 20.Qxf7+ like A).

C) 19... exd5 20.Qh6

C.1) 20... gxh6 21.Nxh6 mate.

C.2) 20... Ne6 21.Qxh7+ Kf8 22.Qh8 mate.

C.3) 20... Bf6 21.Bxf6 winning again.

D) 19... Bxd5 20.Qh6 like C).

E) 19... g6 20.Qh6 winning.

F) 19... f6 20.gxf6

F.1) 20... Bxf6 21.Bxf6

F.1.a) 21... exd5 22.Ne7+ Kh8 23.Qf7 Nfd2 24.Ng6 mate.

F.1.b) 21... gxf6 22.Rg1+ Kh8 (22... Ng6 23.Rxg6+ hxg6 24.Qxg6+) 23.Nh6 Ng6 24.Rxg6 hxg6 25.Qxg6 followed by Nf7+.

F.2) 20... gxf6 21.Rg1+ Ng6 (21... Kh8 22.Qf7) 22.Rxg6+ hxg6 23.Qxg6+ Kf8 24.Rh8 mate.

F.3) 20... exd5 21.f7+ Kh8 22.Bxg7 mate.

F.4) 20... Bd8 21.fxg7 followed by Nh6+.

Time to post and check.

Nov-09-08
Premium Chessgames Member
  agb2002: <Ingolf: I tried 19.Bd4 with the idea Bxd5 20.Qh6 which I thought forced mate (gxh6 21.Nxh6#). I had overlooked 20.- Bxg5 <check> 21.Qxg5 f6 covering g7.> It happened to me exactly the same. I actually saw the possibility of this intermediate move when I started my analysis but forgot it completely while trying to put some order in that mess...
Nov-09-08
Premium Chessgames Member
  al wazir: I *considered* 19. Nxg7, along with several others. After due consideration I gave up.

The best defense I could find after peeking was 22...Bxg5 23. Bxg5 f6 24. Bxf6 Nf4 (24...Qf7 25. Rg1+ Ng6 26. Rxg6+ Qxg6 27. Rg3 Qxg3 28. hxg3, and white is two pieces up, going on three) 25. Nxf5 exf4 26. Rg1+ Ng6 27. Rxg6+ hxg6 28. Qh8+ Kf7 29. Rh7#.

As <dzechiel> noted, the position at move 19 was bizarre. The complications that led up to it were just as insane as those of the puzzle.

Nov-09-08  SufferingBruin: <agb2002> Thank you for your post; it's nice to know I'm not alone.

<al wazir... the position at move 19 was bizarre.> Yep. This was, IMHO, the absolute definition of a Sunday puzzle.

<Terry McCracken--19. Nxg7 is rather obvious.> If we're ever sitting across from each other at a chessboard, I hope we're not playing for money. :)

Nov-09-08  Hektor: What an impressive display of tactics, beginning with 13. Nf5! then 14. Bd5! These are the types of moves that I rarely consider during over the board play. Thanks Chessgames.com for bringing this one to my attention.

As for solving this problem? I can only claim that I considered 19. Nxg7 but did not see the follow-up.

Nov-09-08
Premium Chessgames Member
  johnlspouge: Sunday (Insane):

Kiril Georgiev vs Dlugy, 1983 (19.?)

White to play and win.

Material: Even. The Black Kg8 has 1 legal move. White has a battery Rh3 and Qh5, so the Black Nf8 and Kg8 must protect Ph7. The Black Qc7 must protect Be7, which Nf5 attacks. White has a temporary local superiority on the Black K-side, permitting a sacrificial attack. The Nc3, Rd1, and Be3 require activation, but interestingly, if White plays Bd4, the natural response …e5 to block the a1-h8 diagonal exposes Pf7 fatally.

Candidates (19.): Nh6+, Bd4, Nxg7

I dismissed 19.Nxg7 as the weakest candidate.

Nov-09-08  Vollmer: I found that Nxg7 was a winner right away (but it took me a while to work out all the variations) . First time I got an 'insane' puzzle in less than a minute , I attribute this to good Scotch and Tal's birthday . <Even blind squirrel find nut now and then>
Nov-09-08  Woody Wood Pusher: I got 19.Nxg7 followed by 20.Qh6 but only because I knew it was a puzzle.
Nov-09-08  veerar: I was lucky!
Nov-09-08
Premium Chessgames Member
  DarthStapler: I got the first move, but I don't understand this game at all
Nov-09-08  ChessApplet: < DarthStapler > same as you. Specially the bishop and knight sac :)
Nov-09-08  ChessApplet: I think the purpose of these weird looking sacs is to get rid of the knight on c6 in order for his bishop to be posted on d4. I'm not sure but maybe it's one of his plan.
Nov-10-08
Premium Chessgames Member
  kevin86: The surprizing first move-opens the black position like a can-opener.
Nov-11-08  njchess: I got this one, but it took me about eight minutes of staring at Black's king side.

I wasn't certain how White's knight and bishop wound up in a pawn fork, but I felt pretty certain that moving the knight was key to the position. Also, it was pretty clear to me that given the position of White's queen on the board, that White intended a king side mating type of attack. Therefore, material loss such as the bishop would be acceptable.

Given the above, I looked at three options for move 26. Nxe7+, Nh6+ and Nxg7. 26. Nxe7+ Qxe7 brought me nothing.

26. Nh6+ gxh6 (Kh8? 27. Nxf7+ Kg8) 27. gxh6 (Qxh6 was a dead end since the h7 pawn was protected by Black's knight and king) followed by Rg1 seemed promising but I could not prevent Ng6 and again, my attack was dead in the water.

26. Nxg7 was all I had left. Initially, I thought Black's response would be Kxg7 because after 27. Qh6, White has mate in two. But, then I saw 26. Nxg7 Kxg7 27. Bd4+ Kg8 28. Qh6 e5 29. Bxc5 and Black's position starts to deteriorate rapidly. Although, given how things did work out, Black should have taken the knight.

26 Nxg7 Bxd5 28. Qh6 made sense. The only way for Black to defend against the mating threat on g7 in time was to place a knight on e6. But after exd5, I would own e6. So, 28. Qh6 e5 29. Nh5 Nce6 (Nfe6 loses more quickly) 30. exd5 ... At this point, the game was won. I really didn't care about Black's next move because 31. dxe6 Nxe6 32 Nf6+ Bxf6 33. gxf6 was unstoppable. Great tactical ending.

Nov-22-08  LIFE Master AJ: I have had several inquiries about my analysis of this game ... any interested party can e-mail for more details.
Jul-04-10
Premium Chessgames Member
  plang: Fedorov won another nice game in this line against Kobalia in the 1998 Russian Team Championship after 16..b4 17 Nxg7! (voted the 11th best game of Informant #73).
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