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Peter Svidler vs Conny Holst
Copenhagen op (1991), Copenhagen DEN, rd 9
Sicilian Defense: Najdorf. Amsterdam Variation (B93)  ·  1-0



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Kibitzer's Corner
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Feb-21-10  Jjoq: to rigel1503

may be
18. ... Rxf3
20. Rxf3 Qxe7
21. Raf1 Nd4
21. Rf7 Nf5

22. R1xf5

Feb-21-10  rigel1503: 18. Bxe7 Qxe7 19. Ng5+ Kg8 20.Rxf8+ Qxf8 21. Qh4 Qf5 and white has nothing AND 18. Bxe7 Qxe7 19. Ng5+ Kg8 20.Qh4 Rxf1+ 21. Rxf1 g6 22. Rf7 (What else???) Qxf7 23. Nxf7 Kxf7 24. Qh7+ Kf6 25. Qc7 Bd7 26. Ne4+? Nxe4 27. Qxd7?? Rd8 28. Qxc6 Rd1# OR 26. b4 Rc8 and the Rook and two minor pieces will be too much for the queen
Feb-21-10  TrollKing: Well, it's a pretty sharp combo, but Rybka 3 says that 16... dxe5 was a lemon.

Any combo will always look better when your opponent fails to find the stiffest defense.

Oh -- and for what it's worth -- this combo isn't even top 10 in CT-Art 3.0.

Premium Chessgames Member
  chrisowen: <costachess> The door 'ere is composing you staving off Nd5 and playing 16. e5's sweet. The plan it's.. ah turning the lsb into a good piece. The error in dxe5 is that it neglects the freed bishop.. bxh7 kxh7 bxe7 nxe7 ng5+ kg8 rxf8+ kxf8 qf3+. As long as the stars are burning, like mean Svidler the gig is never up.
Premium Chessgames Member
  johnlspouge: Sunday (Insane):

Svidler vs C Holst, 1991 (22.?)

White to play and win.

Material: Even. The Black Kh8 has 1 legal move, g8. The Black castle is lightly defended, suggesting that White could launch a sacrificial attack based on local superiority and superior development. The White Rf1 x-rays Rf8 though Nf3. The protection of Rf1 is shaky, because the White Bg5 attacks its sole defender, Be7. The White Qg3 pins Pd6 to Qc7. Black can capture 16Nxd3, suggesting that White should take a long, last look at what his Bd3 can do. The White Kh1 is secured from check.

Candidates (22.): Bxb5

<[I built a careful fantasy around various threats over the entire board, but Toga evaluates the move at about -0.8 P for White, i.e., Black has some pull.]>

Do I get points for imagination? :)

Feb-21-10  harish22: e5 opening lines for the bishop is straightforward
Feb-21-10  David2009: Sunday 21/02/2010 Insane Svidler vs C Holst, 1991 White 16?

White can play 16.e5 sacrificing a Pawn to open lines. If Black refuses e.g. by 16...Nxd3, then Bxe7 wins the material back with interest. If 16...Nxe5 17 Nxe5 dxe5 18 Qh4 forking e7 and h7 looks promising. Alternatively Black can play...dxe5. Now the immediate 17. Qh4 does not work (the B is protected twice) but BxB folllowed by Ng5 is a possibility. White seems to have value for his Pawn. This is as far as I want to go, my forward-analysis abilities are limited. Time to see how the game went.
Svidler vs Holst 1991, 16?

click for larger view

After 16 e5 dxe5 comes 17 Bxh7! and multiple threats after 17...Kxh7 18.Bxe7. I hadn't seen any of this. Playing the game out against Crafty using the on-line link below, Crafty soon loses material: For once, the White win is straightforward: try it and enjoy!

Feb-21-10  bengalcat47: Conny, you won't like hearing this, but you've been Hoist with your own petard!
Feb-21-10  scormus: Sunday, so it it's insanely difficult. Only move 16 so I'm surprised its not still "book" (maybe then it was?). Najdorf so expect plenty of choices of move sequences and fireworks. I'll go with 16 e5 and try a few of the 100 continuations. A. 16 ... Bxg5 17 ed Qd8 18 Nxg5 Qe8 19 Rxc8 Qxc8 and its Q for R+N. Maybe 17 ... Qb7 or Qd7 are better? 18 Nxg5 Rf6 19 Qh4 a6 20 Rxf6) and it looks promising for W.

B. 16 ... de then 17 Qh4 Nxe3 18 Bxe7. If ... Rxf3 19 Rxf3 looks good. If almost anything else probably Ng5.

C. 16 ... Nxd3
This looks the most interesting. Then
17 C1 Qh4 Ndxe5 18 Bxe7
C1a. 18 ... Ng6 19 Ng5 Rxf1+ (... h6 20 BXf8) 20 Rxf1 h6 21 Qe4 Ncxe7 22 Rf8+ Ng8 23 Qxg6 C1b. ... Qxe7 19 Nxe5 and W wins unless B plays ... Rxf1+ 20 Rxf1 Kg8 21 Qe4 de 22 Qxc6 Bb7 23 Qb6 and B looks OK (I'm sure I missed something)

So I turn to
C2 17 Bxe7 Qxe7 18 ed Qe8 19 ed
or 18 ... Qf7 19 Nd2 Qe8 20 Qxd3 (if 19 ... Qxf1+ 20 Rxf1 Rxf1+ 21 Nxf1 Ne5) and maybe W still has the edge.

No much for half a days work. So post it now look up the answer

Feb-21-10  scormus: Neat combo, neater than mine in fact. At least I got the first move right, and rejected 16 ... de early on. Good question <kinseadm> I'm sure 16 ... Nxd3 is the best and to my mind the most obvious defense. What I love about the Najdorf is its so rich in possibilities, and today it made me miss lunch.
Premium Chessgames Member
  agb2002: The material is even. Black threatens ... Nxd3, eliminating a potentially dangerous piece.

The lack of communication between the black rooks and the relatively unprotected black castle suggest 16.e5, opening a path for the LSB and the QN:

A) 16... dxe5 17.Bxh7

A.1) 17... Kxh7 18.Bxe7 Qxe7 (18... Nxe7 19.Ng5+ Kg8 20.Qh4 followed by Qh7#) 19.Ng5+

A.1.a) 19... Kg8 20.Qh4 Rxf1+ (20... g6 21.Rxf8+ and mate in two at most) 21.Rxf1 g6 22.Rf8+ Kg7 (22... Qxf8 23.Qh7#; 22... Kxf8 23.Qh8#) 23.Qh7+ Kxf8 24.Qh8#.

A.1.b) 19... Kg6 20.Nxe6+ Kh7 (20... Kh5(6) 21.Rxf8 + -) 21.Nxf8+ Kg8 (21... Kh8 22.Ng6+; 21... Kh6 22.Qg6#) 22.Ng6 + -.

A.1.c) 19... Kh6 20.Qh4+ Kg6 21.Qh7+ Kxg5 22.h4+ Kg4 23.Qg6+ Kxh4 24.g3+ Kh3 25.Qh5+ Kxg3 26.Ne2#.

A.1.d) 19... Kh8 20.Qh4+ Kg8 21.Qh7#.

A.2) 17... Nd4 18.Bg6 Nxf3 19.Qh3+ and mate in two.

B) 16... d5 17.Bxh7 looks similar to A.

C) 16... Nxd3 17.Bxe7

C.1) 17... Qxe7 18.exd6 Qf7 19.cxd3 and White is a pawn ahead and threatens Ne4-Neg5.

C.2) 17... Nxe7 18.exd6 Qd7 19.dxe7 Qxe7 20.cxd3 + - [2N vs B].

I have considered other options like 16.Bxb5 axb5 17.Nxb5 Qd7 18.Bxe7 Qxe7 19.Nxd6, unclear, and 16.Nd5 exd5 17.exd5 Nxd3 18.cxd3 Ne5 19.Nxe5 dxe5 20.Qh4 Bd6 - +.

Premium Chessgames Member
  agb2002: <johnlspouge: ...
Do I get points for imagination? :) >

Of course. Imagination was probably the driving force in David Bronstein and Mikhail Tal's careers, just to mention two examples.

Premium Chessgames Member
  Jimfromprovidence: <agb2002> <A) 16... dxe5 17.Bxh7

A.1) 17... Kxh7 18.Bxe7 Qxe7 (18... Nxe7 19.Ng5+ Kg8 20.Qh4 followed by Qh7#) 19.Ng5+>

After 20 Qh4, above, then 20...Rf4 saves black.

click for larger view

You missed my earlier post. Try 20 Rxf8+! instead. Then, after 20...Kxf8 21 Qf3+ wins the rook.

click for larger view

Feb-21-10  wals: Rybka 1-cpu: 3071 mb hash; depth 18:
time 9 min:

1. (1.65): 16.e5 Nxd3 17.Bxe7[] Qxe7 18.exd6 Qe8 19.cxd3 Bd7 20.Ne4 Rf5

2. (1.53): 16.Bxe7 Qxe7[] 17.e5[] Nxd3 18.exd6 Qf7 19.cxd3[] Bd7 20.Ne4 e5 21.Nc5 Rae8 22.Rfc1 a5 23.Ng5 Qf5[] 24.Nge4 Kg8 25.Nxd7 Qxd7 26.Rc5 Qf5 27.h3 Nd4

Feb-21-10  eblunt: I had the line up to Blacks 18th where I just couldn't see anything for white after 18 .... ♕xe7, and to be honest I still don't see anything for white after that, so I'm not entirely convinced by this puzzle at all.
Feb-21-10  Udit Narayan: <eblunt> If 18...♕xe7 19. ♘g5+

and black is in trouble, no?

Feb-21-10  WhiteRook48: missed 17 Bxh7 totally but not 16 e5
Feb-21-10  beenthere240: Everyone criticizes 18....Rxf3, but I'm sure black saw the attack beginning with Ng5+ and just wanted to prevent that.
Feb-21-10  muralman: I have to recluse myself from this puzzle because I had gone through this game recently. I remembered the ending because it was it was artful. That ruins my week. I got Monday through Saturday.
Feb-21-10  eblunt: < Udit Narayan: <eblunt> If 18...xe7 19. g5+ and black is in trouble, no? >

Not that I can see with my untrained eye ..

Feb-21-10  Udit Narayan: 19. Ng5+ if 18...Qxe7 leads to unavoidable checkmate no matter what black plays next. Kg8 or Kh8 leads to mate quickest (either that or black loses queen). But Kg6 (with Nxe6 discovered check) and Kh6 (with Qh4+, Kg6, Qh7+, etc. leads to spectacular mate with knight sac) aren't viable options either.
Feb-21-10  BOSTER: White major forces have more power on the King's site where you can see black King's castle without the main defender Knight on f6. This is why white attack can be successful.
I want to give you one solution where certainly you can find some inaccuracies, but not doubt this line is amazing. 16.e5 if 16...Nxe5 17.Bxh7 Kxh7, 18.Qh4+ Kg8, 19. Nxe5 Rxf1+ , 20.Rxf1 Bxg5 , 21.Rf8+ Kxf8, 22.Qh8+ Ke7, 23.Qxg7+ Kd8, 24.Qf8#.
Feb-21-10  patzer2: Svidler wins with the clearance pawn sacrifice combination 16. e5!, which opens up a decisive attack on the weakened castled position and solves today's Sunday puzzle.
Sep-04-10  LIFE Master AJ: I remember this puzzle, I chose 16.BxB/e7, to be followed by 17.e5.

I originally thought that I had gotten it wrong ... but then I fired up Fritz. (This morning.)

Guess what. At near 28 ply, over one hour, and nearly 3000 kN/s, Fritz 12 chooses ... exactly what I chose!

Feb-21-16  hedgeh0g: Absolutely insane combination beginning with 16.e5!!
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