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Giovanni Vescovi vs Stanislav Gschwendtner
Groningen Open (1994), Groningen NED, rd 1, Dec-19
Sicilian Defense: Chekhover Variation (B53)  ·  1-0



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Mar-08-20  newzild: Like <An Englishman>, I saw the game line but couldn't see a win against 28...Ke8 from the starting position.

Anyone with a silicon monster?

Premium Chessgames Member
  scormus: Looks as if it ought to be easy, but it's the decoying of the BQ away from guarding c5 that makes tbis a Sunday puzzle. But I haven't yet figured out how W wins after 28 .... Ke8. OK, I think 29 Na5 might do it but if so it wouldn't be easy to find OTB at move 24
Mar-08-20  et1: Why not 25 Rg1 + and then 26 Qf6 for White ?
Mar-08-20  goodevans: <newzild: Like <An Englishman>, I saw the game line but couldn't see a win against 28...Ke8 from the starting position.

Anyone with a silicon monster?>

That doesn't really need an engine. Black has no defence against <29.Rg7> (e.g. 29...Rb7 30.Rg8+ Kd7 31.Qxd8#). The only difficult bit is making sure black will run out of checks, which he does fairly quickly.

It feels like it's been ages since I solved a Sunday puzzle but I got this one pretty quickly. A shame that I failed earlier in the week.

Premium Chessgames Member
  Messiah: In all honesty, this one wasn't that horribly difficult.
Premium Chessgames Member
  agb2002: White has a knight for a bishop.

The first idea that comes to mind is 24.Rxg7+ Kxg7 (24... Kf8 25.Rdg1 wins; 24... Kf8 25.Qf6 wins) 25.h6+ Kf8 (25... Kh8 26.Qf6+ Kg8 27.Qg7#; 25... Kg6 26.Rg1#; 25... Kg8 26.Qf6 Bc6 27.Rg1+ Kf8 28.Rg8+ Kxg8 29.Qg7#) 26.Qf6:

A) 26... Qe7 27.Qh8#.

B) 26... dxe4 27.Rg1 Rd1+ (due to Rg8+) 28.Rxd1 Bc6 (28... Bd7 29.Rg1 Ke8 30.Rg8+ Qf8 31.Rxf8+ wins) 29.Rg1 Ke8 30.Rg8+ Kd7 31.Rxb8 Qe1+ 32.Nc1 axb2 33.Qxb2 wins a rook.

C) 26... Bd7 27.Rg1 as above.

D) 26... Bc6 27.Rg1 Ke8 28.Rg7

D.1) 28... Rd7 29.Rg8+ Qf8 30.Rxf8+ Kxf8 31.Qh8+ wins decisive material.

D.2) 28... Rb7 29.Rg8+ wins decisive material.

D.3) 28... Kd7 29.Qxf7+ and mate in two.

D.4) 28... Qe7 29.Rg8+

D.4.a) 29... Kd7 30.Nc5+ Kc8 (30... Kd6 31.e5+ Kxc5 32.Qxe7+ wins decisive material) 31.Qxe7 Rxg8 32.bxa3 and White looks much better [Q+N+2P vs 2r+b].

D.4.b) 29... Qf8 30.Rxf8+ Kxf8 31.Qh8+ Ke7 32.Qxh7 dxe4 33.fxe4 Rd1+ 34.Nc1 axb2 35.Kxb2 with a similar conclusion.

Premium Chessgames Member
  agb2002: I overlooked 30... Qxc5 in my line D.4.a.
Premium Chessgames Member
  chrisowen: Miles per gallon!
Mar-08-20  Walter Glattke: Yes Kf8, so my bad luck again, 31.-Ke8 32.Rg8+ Kd7 33.Qxf7+ Kd6 34.Rxd8 Rxd8 35.Qxh7 Ra8, and then? Where is the reason to resign, please? D4 sais, white looks much better, I apologize for a wrong king position, but where is the mate, please!? D4 also have changed, seems to be difficulty today.
Mar-08-20  Walter Glattke: 31.-Ke8 32.Rg7 Qd1+ 33.Kb2 Qe2+ 34.Kc1 Qe1+ nightingale (mate) or larch (perpetual), this is the question here.
Premium Chessgames Member
  beatgiant: <Walter Glattke> 31...Ke8 <32. Nc5> and I don't see a defense to the mate threats.
Premium Chessgames Member
  chrisowen: Yes operatic no?
Mar-08-20  Walter Glattke: Ah, yes, mate can only be prolongued with 32.-Qxa2+ 33.Kxa2 Ra8+ 34.Kb2 and two other rook sacs, but then Rg8# follows.
Mar-08-20  Walter Glattke: Or 31.-Ra8 32.Rg8+ Kxg8 33.Qg7# to complete this.
Mar-08-20  spazzky: Von Popiel - Marco here Von Popiel vs G Marco, 1902

Bf1 wins but black resigned

Mar-08-20  goodevans: <Ariogermano>, <et1>

The two pawn moves h6 and c3 are crucial to establishing the bind. The first creates the threat of Rg8+ Kxg8 Qg7# and the second deflects black's Q from the a3-f8 diagonal. If you play <25.Rg1+> then one or other of these either gets missed out or fails to do its job.

A few examples:

25.Rg1+ Kf8 26.Qf6 h6 and white's attack fizzles out.

25.Rg1+ Kf8 26.h6 Bc6 27.Qf6 Ke8 and the most white stands to gain is a few pawns for the sac'd R.

25.Rg1+ Kf8 26.h6 Bc6 27.c3 Qd6 and white has failed to knock the Q off the a3-f8 diagonal.

It's interesting to compare the last example to the game move order. In the game if black had responded to 27.c3 with 27...Qd6 then 28.e5 Qc7 29.Rg1 Ke8 30.Nc5 wins easily.

Mar-08-20  rdeckard: I thought I got this, but 27. c3 was way beyond me.
Mar-08-20  goodevans: I feel my last post was a little disingenuous. Two of the examples I gave actually lead to complex lines and my summaries were a little dismissive. The second one in particular, <25.Rg1+ Kf8 26.h6 Bc6 27.Qf6 Ke8>, is very difficult to evaluate and it's possible white <might> be able to force a win from it (e.g. by pushing the h-pawn).

I guess the point is that the game line leads quite quickly to a win whereas <25.Rg1+> leads to less clear cut lines that seem to favour black.

Mar-08-20  RandomVisitor: After 14.f3

click for larger view


<46/70 08:16 -0.20 14...a6 15.f4 b5> 16.a3 Rab8 17.f5 Qc8 18.Rf1 a5 19.Bh6 b4 20.Qg5 g6 21.axb4 axb4 22.Na2 Qb7 23.fxg6 hxg6 24.Rxf6 Rdc8 25.Rd3 Rc5 26.Qf4 Rh5 27.Rh3 Rxh3 28.gxh3 e5 29.Qf2 Qxe4 30.Nb3 Rc8 31.Nbc1 Kh7 32.Bg5 Bxf6 33.Bxf6 Qf4 34.Qxf4 exf4 35.Nxb4 f3 36.Ncd3 Bd7 37.Be7 Bxh3 38.Ka2 Bf5 39.Kb1 Re8 40.Bxd6 Re4 41.Bg3 Be6 42.b3

Mar-08-20  RandomVisitor: After 13.Nd4

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<39/67 03:42 -0.91 13...Rab8 14.Qe2 b5> 15.f4 b4 16.Ncb5 Bxb5 17.Nxb5 Qb6 18.Bxf6 Bxf6 19.Nxd6 Rxd6 20.Rxd6 Qxd6 21.e5 Qc7 22.exf6 Qxf4 23.Qe5 Qxe5 24.Rxe5 gxf6 25.Ra5 Rb7 26.a3 bxa3 27.Rxa3 Kg7 28.c4 f5 29.Kc2 Kf6 30.Ra6 f4 31.c5 Kf5 32.c6 Rc7 33.Kd3 Ke5 34.Ke2 Kd6 35.Kf3 e5 36.g3 fxg3 37.hxg3 Rxc6 38.Rxa7 Rc7

Mar-08-20  electrofam: ...31 ke8 32.Nc5
Mar-08-20  RandomVisitor: After 11.Kb1

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<51/75 30:34 -0.56 11...Qc7 12.Bxf6 Bxf6 13.Qxd6 Qb6> 14.Qd2 Rad8 15.Qe3 Bxc3 16.Qxb6 Rxd1+ 17.Rxd1 axb6 18.bxc3 Bxe4 19.Kb2 Rc8 20.Rd4 Bc6 21.c4 Kf8 22.Ne1 Ke7 23.Rd3 Be4 24.Rc3 Rc5 25.a3 b5 26.cxb5 Rxb5+ 27.Kc1 Kd6 28.Kd2 Bc6 29.Rd3+ Rd5 30.h4 h6 31.g3 Rxd3+ 32.cxd3 Kc5 33.Nc2 Kb5 34.Kc3 Ka4 35.f4 Bd5 36.Kb2 b5 37.Kc3 f6 38.Kb2 h5 39.Kc3 e5 40.fxe5 fxe5 41.Ne3

Mar-08-20  Walter Glattke: 25.Rg1+ Kf8 26.h6 Qe7 27.Rg8+ Kxg8 28.Qxe7 dxe4 29.fxe4 Re1+ 30.Nc1 axb2 31.Kxb2 Rg1 32.Qd6 Ra8 33.Qd4 Rg6 White advantage, but not so strong as the match continuation.
Mar-08-20  Cheapo by the Dozen: I didn't calculate this successfully. What I missed was a way to move the surviving rook forward from g1 without allowing back rank counterplay by Black.

The answer I overlooked is that the combination eventually gets to the point that Rg8+ is mate-in-two.

Mar-08-20  morfishine: I played 24.Rxg7+ Kxg7 <25.Qg5+> thinking that was sufficient, perhaps not
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