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Evgeni Vasiukov vs Pal Petran
Zala Cup (1977), Zalaegerszeg HUN, rd 6, Jul-??
Modern Defense: Standard Defense (B06)  ·  1-0

ANALYSIS [x]

FEN COPIED

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sac: 23.Rxe5 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Dec-24-11
Premium Chessgames Member
  luzhin: Vasiukov played many beautiful games, but he slightly over-eggs the combo here: although 28.Rxf6 is winning, it is not as crushing as the more obvious 28.Nxg5
Dec-24-11  polarx: I think 23... dxe5 is not the best response for black. The real deal comes after 23... Bxe5.

<23. Rxe5 Bxe5 24. Ne6+>

and provided that black avoids 24...Kg8 (which leads to mate: <23. Rxe5 Bxe5 24. Ne6+ Kg8 25. Qxg5+ Kh7 26. Bc2+ f5 27. Bxf5#>) and instead plays 24...Ke8, I think he is not too bad and much better than in the game continuation.

Can't find anything really decisive for white after <23. Rxe5 Bxe5 24. Ne6+ Ke8>

Dec-24-11  anandrulez: f4 doesnt win ?
Dec-24-11  polarx: Checked other posts and still think 23... Bxe5 is better than 23... dxe5. The lines given after Bxe5 are not conclusive. So I think that means I solved the puzzle.
Dec-24-11
Premium Chessgames Member
  Domdaniel: Very difficult to foresee the later moves, especially 26.Nf3 -- I felt sure, in this sort of line, that it would land on e6.
Dec-24-11  scormus: I struggled again today. To be honest I thought about either and eventually both Nd6+ and Rxe5 but I picked wrong, at least as far the the game continuation testifies.

I fancied something along the lines of 23 Nd6+ fxe6 (... Kd8 24 Ba4+) 24 Rxe5 dxe5 25 dxe6. A fun continuation would be ... Rg8 26 Qh7 Rg7 27 Qh8+ Rg8 28 Qh6+ Rg7 29 Rd7 Re8 30 Qh8+ Rg8 31 Qxf6+ exf6 32 Rf7#. Not forcing but OTB it might be easy for B to go wrong here.

A tough one. I'm sure I'd never have got the continuation with Nf3 coming in. Sigh :(

Dec-24-11  shivasuri4: <polarx>,see some of the 2004 posts.
Dec-24-11
Premium Chessgames Member
  Penguincw: I got it nowhere right. :(
Dec-24-11  Rosbach: Very hard and couldn't see it.
After checking I see the combination is about winning material. 28 Rxf6 Rxf6 29. Qxg5 Rg6 30. Qxe7.
Dec-24-11  polarx: I've read those posts. Crafty says: 23...Bxe5 24. Ne6+ Ke8 25. Nxg5 Bf6 26. Nh7 Be5 27. Re1 (eval 1.15; depth 15 ply; 750M nodes)

Hoever, Chessgames.com say they found this line evaluated as decisive for white.

Helloween thought white wins after 23...Bxe5 but, as karlzen pointed, he had not considered

23...Bxe5 24.Ne6+ Ke8 25.Nxg5 Bf6 26.Nh7 Be5 27.Re1 Qc5

I ran the line through rybka and I got:

1. Rxe5 Bxe5 -0.65/15 2. Ne6+ Ke8 -1.00/16 3. Nxg5 +0.29/2 Bf6 -0.72/13 4. Nh7 +1.15/14 Be5 -1.15/13 5. f4 +1.27/13 Bg7 -1.25/13 6. Re1 +1.14/12 Qc5+ -1.42/13 7. Kh2 +1.41/13 Rxh7 -1.41/14 8. Qxh7 +1.46/13 Kf8 -1.60/12 9. Qxh5 +1.60/11 b5 -1.73/13

White may win in the end but I think not after a hard fight. What I mean is it's not straightout catastrophic. Whatever.

Dec-24-11  Marmot PFL: I saw 23 Rxe5 right away, but thought black would survive if he took with the bishop. Allowing 24 d6 looks really bad.
Dec-24-11  Marmot PFL: Maybe what black missed was that after 24 d6 the e5 pawn is pinned to the queen so he can't take the Nd4.
Dec-24-11  stukkenjager: 23.Rxe5 Bxe5 24.Ne6+ Ke8 25.Nxg5 Bf6 26.Nh7 Be5 27.Re1 Qc5 (27...a6 28.Ng5 f6 29.Ne6) 28.Ng5 Rf8 29.Bd1 seems more then ok.
Dec-24-11  James D Flynn: When I click on the board position I no longer see the moves only the other comments. I gather the rather obvious Rxe5 was played in the game. At first I wasn't sure whether to precede it by Ne6ch, but then could see a good continuation after 23.Ne6ch Ke8 24.Rxe5 Bxe5. Clearly white has to force the advance d6: so 23.Rxe5 if Bxe5 24.Nc6 Qc7 25.Nxe5 d6xe5 26.d6 e7xd6 27.Rxd6 and the threat Rd7 or Rf6 wins eg.Ke8 28.Qxe5ch picks up the R on h8 with check. If black replies d6xe5 24.Ne6ch f7xd6 25,Qxe6 there is no answer to Q threats on F7 or g8. If black instead plays Ke8 25.d6 wins e.g Rd8 27.Nc7ch Kf8 28.d6xe7ch Kxe7 29. Nd5ch wins material.
Dec-24-11
Premium Chessgames Member
  chrisowen: 23 casting aspersions take knight rookxe5 (pea cook little in

debatable) bxe5 ne6!

Lewd comment cry fowl dxe5 d6!

Is as far as I got it.

In have up preaching from the pulpit unleash bishop midknight

stalker.

Again queen offside so d6 a milly it around freeing bb3 life

liberty happiness.

Low granny e7 on the loose f5 wheel.

Chair of the board nd4 committee in pry it de-column.

In lovely two moves ahead rxe5 d6 coming good for knight.

Dec-24-11
Premium Chessgames Member
  Once: Much too complicated for my little brain. I wanted to play 23. Rxe5, but beyond that ... nope, nada, zilch.

Pretty finish, but way over my head.

Happy christmas, all.

Dec-24-11  Patriot: I tried solving this late last night before going to bed--big mistake! I needed a clear head on this. But even after a good night's rest I have to say 23.Rxe5 is still unclear. I couldn't find anything conclusive but where everything else is equal, going into an unclear position isn't such a bad thing. We can learn a lot from positions like that.
Dec-24-11  DarthStapler: I got the first move
Dec-24-11
Premium Chessgames Member
  sethoflagos: It took me a few goes, but I managed eventually to get this result [Event "120m/40+60m/20+30m"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Seth"]
[Black "Rybka 3 1-cpu 32-bit"]
[Result "1-0"]
[PlyCount "135"]

23.Rxe5 Bxe5 24.Ne6+ Ke8 25.Nxg5 a6 26.Re1 [26.Qxf7+ also possible] 26...f6 27.Ne6 h4 28.gxh4 Rxh4 29.Ng7+ Kd8 calls for exchange sac #2


click for larger view

30.Rxe5 dxe5 31.Ne6+ Kc8 32.d6 Kb8 [32...exd6 33.Qxf6 Kb8 34.Qxh4] 33.dxe7 Ka7 34.Qxf6 and the threat of pawn promotion wins one or other of the rooks


click for larger view

34...Rhh8 35.Nf8 Qc5 36.Qxh8 Qxe7 37.Ng6 Qg5 38.Qg7 Rd8 39.Qe7 Qc1+ 40.Kh2 Qd2 41.Qc5+ Ka8 42.Qe3 Qxb2 43.Nxe5 Qa1 44.f4 Qb1 45.Kg3 Qh7 46.Kf2 Qh4+ 47.Kg1 Qh7 48.Nc4 Qb1+ 49.Kf2 Qh7 50.Nb6+ Kb8 51.c4 Qh4+ 52.Kg1 Qh5 53.c5 Re8 54.Nd7+ Ka8 55.Ne5 Qh7 56.Qd4 Qh4 57.Qf2 Qh7 58.Bc2 Qc7 59.g4 another rook falls to a pawn advance


click for larger view

59...Rxe5 60. fxe5 Qxe5 61. Bf5 Qg7 62. Kg2 Qg8 63. Kf3 Qh8 64. Be4 Qa1 65.c6 Qd1+ 66. Kg3 bxc6 67. Bxc6+ Kb8 68. Qb6+ 1-0 Rybka resigns at:


click for larger view

Dec-24-11  James D Flynn: Dear polarx,
I agree that after 23.Rxe5 Bxe5 24.Ne6ch there is no clear win. Unfortunately you seem to have missed my earlier posting where I suggested 24.Nc6 which clearly wins.
Dec-24-11  Magic Castle: I cannot see the winning line after 28....Rf6. Black loses two more pawns but will end up with 2 rooks against a bishop and a knight.
Dec-24-11  stst: quite many variations, one main line:
23.Ne6+ fxe6
24.dxe6 Ke8
25.Rxd6 exd6
26.Qxf6 Rf8
27.Qg7 Kd8
28.Rxe5 Kc8
29.Qd7+ Kb8
30.Rxa5 a6
31.e7
and Bk couldn't defend the promoting P,nor the poor position, with material far behind.

submit to check

Dec-24-11  Magic Castle: Oh, I see. after 28... Rf6 29. Qg5+ and one of the rooks goes. If the King moves away then 30. Qf6 and if 29...Rg6, then 30. Qe2.
Dec-25-11
Premium Chessgames Member
  michael104: Anybody have an answer to the suggestion of James D Flynn that 23.Rxe5 Bxe5 24.Nc6 wins?
Dec-25-11
Premium Chessgames Member
  sethoflagos: <<michael104:> Anybody have an answer to the suggestion of James D Flynn that 23.Rxe5 Bxe5 24.Nc6 wins?>

If black continues 24...Qc7??, as suggested, white should indeed win.

Different story after 24...bxc6

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