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Konstantin Lerner vs Fikret Sideifzade
USSR Championship First League (1979), Frunze URS, rd 13, Oct-??
English Opening: Symmetrical. Three Knights Variation (A34)  ·  1-0



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Premium Chessgames Member
  LIFE Master AJ: This is for one of my students, (he only just learned the moves about a month ago). I'm just guessing, but right now he is just (mostly) counting points.

[White is winning in all lines, working out the exact process can be an instructive tactical exercise:

22.Qe5+ Be6 ; ("Box?")
Apparently, this is forced.


( A.) Much worse is: </= 22...Kf8? ; 23.Qd5!, " " and to save his King, Black will lose a lot of material.

* * *

B.) Obviously hopeless would be:
</= 22...Kd7?; 23.Qd5+, " " and Black loses his Rook/a8.

* * *

C.) Also unattractive for Black would be the following line: </= 22...Be7?!; 23.Bd5 Ra7; 24.Qb8, & White is winning. )


23.Bxe6 fxe6; 24.Qxe6+ Kf8; 25.Qc6 Ba5+; 26.Ke2 Rd8; 27.Qf6+! Ke8; 28.Qxa6!, " " and Black will lose more buttons. ]

Aug-19-09  ZUGZWANG67: How bizarre. After I saw that the WB would be defended once at b2, I omitted to count it' s number of attacker (2) ! I was then under the impression that W would gain a whole piece. But noticing Black attacking twice the b2-square, one finds out that this is more complex...
Aug-19-09  Patriot: <Octal: Does 19 Ke2 with the idea of 20 Rh1 have any apparent value? >

Hmm...That move threatens 20.Rh1 and 21.Rh7 or 21.Rh8+, but isn't very forcing which is why I never considered it. I wondered if 19...Be6 20.Bxe6 Qxe6 21.Qxb7 Qc8 =(21.Qxc5 Be7) is ok, or 19...Kf8 20.Bxc5+ Kg7 =. I'm not completely sure about the evaluation so I will look at this later using Fritz. Maybe someone else can take a look?

Aug-19-09  ZUGZWANG67: I' m feeling a little guilty for having missed such a nice tactic!
Aug-19-09  Mercury4: <<kap54: Just wanted to say that 19.Bxc5 does not work, as Black is able to capture the bishop on c4 with check after 19...Qc3+ 20.Rd2 Qc1+ 21.Ke2>>

kap, not 21.Ke2, 21.Qd6.

Premium Chessgames Member
  Once: <agb2002: Do you remember Fritz's move for White after 21... f6 ?>

click for larger view

Decisions, decisions! After 20+ mins, Fritz is thinking about:

22. Qb1 (+2.84)
22. Qb3 (+2.69)
22. Qc3 (+2.51)
22. Bd3 (+2.48)
22. Bd5 (+2.46)

Qa3, Qd2 and Qc2 also score around +2. So I guess that Fritz sees nothing immediately crushing, but just likes white's activity and development.

Aug-19-09  felixd: Awww... It took me almost 2 minutes to find it :(
Aug-19-09  jsheedy: 19. Bb2 wins a piece. And with the capture of the f6 bishop, white threatens mate on d8.
Aug-19-09  wals: [Event "Frunze"]
[Site "Frunze"]
[Date "1979.??.??"]
[Round "?"]
[White "K Lerner"]
[Black "Fikret Sideif Zade"]
[Result "1-0"]
[ECO "A34"]
[WhiteElo "2549"]
[Annotator "Rybka 3 1-cpu (30m)"]
[PlyCount "43"]

A34: Symmetrical English: 2 ♘c3, lines with ...d5

1. c4 Nf6 2. Nc3 c5 3. Nf3
d5 4. cxd5 Nxd5 5. e3 Nxc3 6. bxc3 g6 (6... Nc6 7. Qb3 ) 7. h4 (7. Ba3 Qc7 ) 7... Bg7 (7... Nc6 8. h5 ) 8. h5 Nc6 (8... Qd5 9. Qb3 Qf5 10. d4 ) 9. Bc4 (9. Qb3 b6 ) 9... a6 Consolidates b5 (9... O-O 10. hxg6 hxg6 11. Qe2 ) 10. d4 (10. hxg6 hxg6 11. Rxh8+ Bxh8 ) 10... e5 (10... b5 is an interesting idea 11. Bb3 c4 ) 11. hxg6 hxg6 12. Rxh8+ Bxh8 13. Qb3 (13. dxc5 Qxd1+ 14. Kxd1 Bf6 ) 13... Qe7 14. Ba3 (14. dxc5 e4 15. Nd2 Kf8 ) 14... exd4 15. cxd4 Nxd4 (15... Bxd4 16. Rc1 Bg4 17. Be2 ) 16. Nxd4 Bxd4 ♗lack has a new passed pawn: c5 17. Rd1 (17. Rc1 Bg4 18. Kf1 Bg7 ) 17... Bf6 18. Qb6 White threatens to win material: ♕b6xc5 Qe5 ?? BLUNDER (18... Bg4 was possible 19. Bxc5 Rd8 ) 19. Bb2 Qxb2 20. Rd8+ Bxd8 21. Qxb2 b5 ?? BLUNDER an oversight. ♗ut ♗lack was lost anyway. (21... f6 ) 22. Qe5+ (22. Qe5+ Be6 23. Bxe6 fxe6 24. Qxe6+ Kf8 25. Qc6 Ba5+ 26. Ke2 ) 1-0

The above may be of interest to those seeking help.

Aug-19-09  Deji: Not bad. This one took me quite some time. I think the difficulty should be like 2.5 to 3 star.
Aug-19-09  gofer: 19 Bb2

Threatening to win the bishop on f6, which black cannot defend as allowing Bxf6 would be terminal as Rd8+ would lead to mate. So the following is forced!

19 ... Qxb2
20 Rd8+ Bxd8 (Ke7 Qd6#)
21 Qxb2

now this should be winning for white as the king is open, so black isn't able to easily defend his king and also isn't completely developed with Ra8 and Bc8. But black is not completely lost as he does have a B and R for his Q. Personally, if I were black I would play...

21 ... b5
22 Qe5+
23 ... Be7/Kf8 24 Bd5 Ra7 25 Qb8 winning
24 ... Kd7 25 Qd5+ winning

So obviously 21 ... b5 is flawed... :-)

So whatelse is there for black???

Time to check...

Aug-19-09  gofer: Nice to see that black played my awful suggestion 21 ... b5 and then also found out how bad it was, but I dont think 21 ... f6 is much better.

21 ... f6
22 Bd5 Rb8 (not Ra7)
23 Qc2 f5 (black must defend the g6 pawn)
24 Qxc5 and
25 Qd6 is coming... ...this must be game over!

Aug-19-09  bennytschet: Thanks, zanshin
Aug-19-09  Milesdei: 20. Qc7 wins instantly, no? After 20...Be7, 21.Rd8+, BxR, 22. Qxf7#.
Aug-19-09  WhiteRook48: I was thinking 19 Rd8+ wins because I thought white had some other rook on d3
Aug-19-09  gofer: <Milesdei> I think 20 Qc7 loses immediately ...

20 ... Qc3+
21 Rd2 Qxc4

Aug-19-09  YouRang: <Milesdei: 20. Qc7 wins instantly, no? After 20...Be7, 21.Rd8+, BxR, 22. Qxf7#.>

No. 20.Qc2 Bc3+ followed by 21...Qxc4 and black wins. :-\

Aug-19-09  Milesdei: Thanks for the correction, Gofer and Yourang.
Aug-19-09  Milesdei: What I meant was, 20.Qc7 wins immediately if black cooperates.
Aug-19-09  jackpawn: I found it, but took me longer than it should have. Will anybody accept my excuse that it's late and I'm ready for bed?
Aug-19-09  ohfluckaduck: Great tactical play!
Aug-19-09  kap54: <Mercury4: <<kap54: Just wanted to say that 19.Bxc5 does not work, as Black is able to capture the bishop on c4 with check after 19...Qc3+ 20.Rd2 Qc1+ 21.Ke2>>

kap, not 21.Ke2, 21.Qd6.>

How do you propose white plays Qd6 while under check?

Premium Chessgames Member
  patzer2: For the Wednesday, August 19, 2009 puzzle solution, White begins with the decoy 19. Bb2! in order to set up 20. Rd8+! to deflect the defending Bishop's protection of the Black Queen.

See <hypersphere>'s post for a quick and easy explanation of the tactics involved. See <LIFE Master AJ>'s post for an analysis of the final position, demonstrating White's overshelming tactical and positional superiority despite a near even material count..

Premium Chessgames Member
  LIFE Master AJ: <patzer2> Thanks for the summary!

<wahls> Is that just computer generated anlysis?

Premium Chessgames Member
  benveniste: <Patriot: After 19.Bb3 (presumably to stop the Qc3+ and forking the two bishops), what's after 19...Be7? I'm not seeing a winning continuation.>

After 19... ♗e7, White plays ♗xc5 and has too many threats to counter. The best line I found left Black two pawns down:

19. Bb3 Be7 20. Bxc5 Bg4 21. Qxb7 Rc8 22. Qxa6 Qxc5 23. Qa4+ Kf8 24. Qxg4

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