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Ivan Cheparinov vs Milan Drasko
European Team Championship (2007), Heraklion GRE, rd 3, Oct-30
English Opening: Anglo-Indian Defense. Nimzo-English Opening (A17)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Mar-24-17  Walter Glattke: Hi, wtpy, after 25.Bxb3 Bxe4 26.Bxa6 Rd3
White has a pawn more, so as after 23.Bxf7+ Kxf7 Qxc6, with always correct moves the Advantage never changed.
Mar-24-17  takchess: I am with Boster in 22. Rxf4 . although not correct answer would white be punished for this move ?
Mar-24-17  BOSTER: < PJs Studio:suprisingly easy for a Friday>. My Q is: Could you draw the pos. after move 27.Bf6 looking at POTD pos?
Mar-24-17  unferth: yeah, I had Rxf4 followed by e5 (N moves) e6 threatening both exf7+ and Qg8 mate--anybody with an engine care to see if this works?
Mar-24-17
Premium Chessgames Member
  agb2002: White has the bishop pair for a bishop and a knight.

Black threatens Nxe4 and Rxd2 followed by Nxe4 with counterplay.

The rook on c1 and the queen x-ray the black bishop. The pawn on e5 protects the knight on f4 and Nc4 would attack the black queen and that pawn. These details suggest 22.Nxf7+, vacating c4 with tempo:

A) 22... Kxf7 23.Nc4

A.1) 23... Nxe4 24.Rxf4+

A.1.a) 24... exf5 25.Qxg7+ Ke6 26.Nxb6 wins decisive material.

A.1.b) 24... Kg8 25.Rxe4 wins a piece (25... Bxe4 26.Nxb6).

A.2) 23... Qa7 24.Nxe5+

A.2.a) 24... Kg8 25.Nxc6 with two extra pawns and several threats (Nxa7, Nxd8, Rxf4, Nxa5, etc.).

A.2.b) 24... Rxe5 25.Qxe5 with a rook and two pawns for two knights looks very good for White. For example, 25... Ng6 26.Rxf6+ gxf6 27.Qxf6 Ke8 28.Qxc6+ + - [B+3P vs n].

A.3) 23... Qc5 24.Nxe5+ Q(R)xe5 25.Qxe5 R(Q)xe5 26.Bxe5 Nd3 (due to Bxf4 and Rxc6) 27.Bxf6 wins decisive material.

A.4) 23... Ne7 24.Qf3 Nd4 (25... Qc7 26.Qxe2 wins a pawn) 25.Qh5+ Kg8 (25... g6 26.Qxh7+ Ke6 27.Rxf6+ and 28.Nxb6 wins) 26.Rxf6 seems to win a pawn at least (26... Qxb3 27.Rxc6; 26... gxf6 27.Nxb6).

B) 22... Kh8 23.Rxf4 (or 23.Bxe8 as below) 23... exf4 24.Qxf6 Rg8 (24... gxf6 25.Bxf6#; 24... Rxd2 25.Qxg7#) 25.Qxf4 (25.Qxc6 Qxc6 26.Rxc6 Rd1#) wins decisive material.

C) 22... Kf8 23.Bxe8 Bxe8 (23... Rxe8 24.Qxc6 wins) 24.Qxe5 wins decisive material.

Mar-24-17
Premium Chessgames Member
  agb2002: I meant 23... Ne2 in my line A.4.

According to Stockfish, my 26.Rxf6 loses the advantage. 26.Qxe8+ followed by 27.Nxb6 is much better.

Mar-24-17  ChessHigherCat: I was thinking about starting with 21. Rxf4 but it's not very forcing because black can trade down with Rxd2 immediately. The only really forcing move was 21. Bxf7+. After Kxf7, white can't win back a piece with Qxf6 because the N on d2 is still en prise. 22. Nc4 is a semi-obvious way of getting the N out of danger while gaining a tempo by attacking the black Q, but foreseeing all black's possible responses (including Qd4 or Ne2) and their refutations was too hard for me.
Mar-24-17  BOSTER: If 21.Rxf4 Rxd2 22.RXf6 and white is better.
Mar-24-17  tatarch: <unferth: yeah, I had Rxf4 followed by e5 (N moves) e6 threatening both exf7+ and Qg8 mate>

<BOSTER: If 21.Rxf4 Rxd2 22.RXf6 and white is better.>

I was looking at this too but don't see a good answer to Rxf4, exf4, e5, Ng4 threatening the smother.

Mar-24-17  ChessHigherCat: <tatarch: <unferth: yeah, I had Rxf4 followed by e5 (N moves) e6 threatening both exf7+ and Qg8 mate> <BOSTER: If 21.Rxf4 Rxd2 22.RXf6 and white is better.> I was looking at this too but don't see a good answer to Rxf4, exf4, e5, Ng4 threatening the smother.> Did you look at Rxf4, exf4, e5, Ng4 Bxf7+? If Kxf7 e6+ and the king can't go back to f8 or g8 because of Qg8#
Mar-24-17  unferth: <I was looking at this too but don't see a good answer to Rxf4, exf4, e5, Ng4 threatening the smother.>

doesn't h3 work--hitting the knight and making luft on h2?

Mar-24-17  tatarch: <ChessHigherCat: Did you look at Rxf4, exf4, e5, Ng4 Bxf7+? If Kxf7 e6+ and the king can't go back to f8 or g8 because of Qg8#>

Hmm no, that's interesting. If king takes pawn on e6, he's right in middle of board but black is up a lot of material. I'd need an engine to see if there's a mating net -- would be fun to play as either side.

Mar-24-17  tatarch: <unferth: doesn't h3 work--hitting the knight and making luft on h2?>

Bishop sac on g2

Mar-24-17  Ariogermano: I love rang's comments
Mar-24-17  unferth: what's black got after Kxg2 Qf2+ Kh3 Qxh2+ Kg4? sorry, kibitzing from work-- no time to look closely just now.
Mar-24-17  ChemMac: <devere> 23...Ne2 24.NXe5+ RXe5 25,QXe5 If now e.g 25...Ba8 against RXf6+, then Qa5+ picks up the N. 25..NXc1 26.RXf6+ Kg8 27.Rd6
Mar-24-17  ChessHigherCat: <tatarch: <unferth: yeah, I had Rxf4 followed by e5 (N moves) e6 threatening both exf7+ and Qg8 mate> <BOSTER: If 21.Rxf4 Rxd2 22.RXf6 and white is better.> I was looking at this too but don't see a good answer to Rxf4, exf4, e5, Ng4 threatening the smother.> Correction (sorry, just a blitzer, I have problems with notation): Did you look at Rxf4, exf4, e5, Ng4 Bxf7+? If Kxf7 e6+ and the king can't go back to g8 because of Qxg7# and Kf8 Qxg7+ looks promising for white, too.
Mar-24-17  BOSTER: What is clear that e4-e5 not a good
move.
Mar-24-17  brainhack: very well analyzed my friend
Mar-24-17  RandomVisitor: 17.f4?! gives white some problems, perhaps better is


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Komodo-10.1-64bit:

<+0.32/37 17.Qf3 d5 18.exd5 Bxd5 19.Bxd5 Qxd5 20.Qxd5 Nexd5> 21.Rad1 Nf4 22.Nc4 Reb8 23.b4 Ne2+ 24.Kh1 axb4 25.Bxe5 Rb5 26.Bxf6 gxf6 27.Nd6 Rb6 28.axb4 Rxb4 29.Nf5 Rf4 30.Ne3 Rfa4 31.g3 Nc3 32.Rc1 Ne4 33.Kg2 h5 34.h3 R8a5 35.Rc2 Ra2 36.Rfc1 Rxc2 37.Rxc2 Kf8 38.Rc7 Kg7 39.Kf3 Nd6

Mar-25-17
Premium Chessgames Member
  steinitzfan: I looked over that exchange sacrifice (Rxf4) with Fritz. After e5 if Black answers Nd7 White's attack works like a charm. Ng4 yields a brilliant win for Black but for most of us it would be a might taxing on the tactical powers. Nh5 is a pedestrian move that holds the extra material and brings White's attack to a halt.
Mar-25-17  unferth: <steinitzfan> thank you. in that line, how does black win after Ng4 h3?
Mar-25-17
Premium Chessgames Member
  steinitzfan: <unferth> After h3, Black sacs Bxg2. The king takes the bishop and Black moves Qf2. That pawn on h3 is blocking the king's flight so he moves to h1. Qh2 is mate. I'll check the line this evening and let you know if anything's wrong but I believe I'm recalling it correctly.
Mar-25-17  unferth: oh crap, my mind deleted the h3 pawn. thanks.
Mar-25-17  BOSTER: < steinitzfan> Thanks for interesting line.
I'd play Rf1 instead e5.
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