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Larry Mark Christiansen vs Javier Benito Campos-Moreno
Chess Olympiad (1980), Valletta MLT, rd 2, Nov-21
Queen's Indian Defense: Spassky System (E14)  ·  1-0


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Kibitzer's Corner
Premium Chessgames Member
  ConLaMismaMano: What was the main error? Maybe instead of 18...b5, could g6 be better?
Jun-27-14  SimonWebbsTiger: a case of "storming the barricades", <Big Larry C> style, with a "ROVER" a la St. Louis style.

The "official" annotations to help solvers.

<20. Nd7>

<a> 20...Nxd7 21. Bxh7 Kh8 22. Bg6 Kg8 23. Rh8 Kxh8 24. Qh5

<b> 20...Nf4 21. Qc2 Nxh3 22. gxh3 Be4 23. Nxf6 Bxf6 24. Qxe4 g6 25. Ne5

<20...Qc7 21. Bxh7 1-0>

If 21...Nxh7 22. Qh5; 21...Kh8 22. Bb1 Kg8 23. Nxf6 Nxf6 24. Bh7 Kh8 25. d5 g6 26. Bxg6 Kg7 27. Rh7 Kxg6 28. Qd3

(Byrne, Mednis)

Jun-27-14  Cheapo by the Dozen: I'm starting out stumped. White doesn't have much of an attack unless he can get rid of the f6 knight, which has an outpost knight defending it. The one promising approach I see is 20 Nd7, because

20 Nd7 Nxd7
21 Bxh7+ Kh8
22 Bb1+ Kg7
23 Qh5

wins via the unstoppable threat of Qh8+.

But if Black declines his knight, it's hard for White to just snatch the exchange, because Black has his own fork with ... Nf4, as in:

20 Nd7 Qc7
21 Nxf8 Nf4

So what I'd play over the board is

20 Nd7 Qc7
21 Nxf6+ Nxf6
22 Ne5

I like this position for White, Black's various open lines notwithstanding, but I hardly feel I've solved the puzzle.

Premium Chessgames Member
  al wazir: White can play 20. Nd7, forking ♕ and ♖ , but black can fork right back with Nf4. But so what? 21. Qc2 Nxh3+ 22. gxh3, and now if black plays 22...Qc7, white has 23. Nxf6+ and Qxh7#. Black must play 22...Rd8, giving up his ♕ for ♖+♘.
Premium Chessgames Member
  M.Hassan: "Difficult"
White to play 20.?
Sides are equal

At first I tempted to go for 20.Bxh7+ but dropped it out soon as being immatured and there were no results, instead I thought to deviate the supporter of h7 square, i.e Nf6

20.Nd7 Nxd7
21.Bxh7+ Kh8
22.Bf5!+ Kg8
Threatening mate on h7 or h8
<23...N7f6 Qh8#>
<23...f6 opening an escape square for the King 24.Bxe6+ Rf7 25.Qxf7#

I saw another line of solution:
Line 2
20.Nf7 Nf4 Forking Queen & Rook
21.Qc2 threatening mate on h7
22.gxh3 g6
Time to check
Why Black resigned after 21.Bxh7?

Premium Chessgames Member
  M.Hassan: 21.Bxh7+ Nxh7
22.Qc2 Ndf6
Black can defend and can continue playing. Am I correct?. Appreciate comments
Premium Chessgames Member
  Marius: Hassan; 22. Qh5, target is h8 not h7 which knight could hve protected
Premium Chessgames Member
  al wazir: <M.Hassan: 21.Bxh7+ Nxh7 22.Qc2 Ndf6. Black can defend and can continue playing. Am I correct?> No: 22. Qh5 Ndf6 23. Nxf6+, followed by 24. Qxh7# or 24. Qh8#.
Premium Chessgames Member
  pawn to QB4: <20.Nd7 Nxd7
21.Bxh7+ Kh8
22.Bf5!+ Kg8
23.Qh5 >
also, in this line not 23. Qh5 but 23. Rh8+, 24. Qh5+ and mate on h7.
Premium Chessgames Member
  morfishine: <20.Nd7>
Jun-27-14  Balmo: All hail Larry Christiansen, King of the cheapos! Great tactical player.
Premium Chessgames Member
  Penguincw: I got 21.Nd7+ with 22.Bxh7+ to follow, so good enough for me. :)
Jun-27-14  Eduardo Leon: 20.♗xh7+ fails to 20...♘xh7 21.♕h5 ♘df6. We have no way to dislodge the ♘d5, but we do have...

<20.♘d7 ♕(any) 21.♗xh7+ ♘xh7 22.♕h5 ♘df6 23.♘xf6+>

Game over.

Jun-27-14  sombreronegro: Black's two most important pieces are the queen materially and the knight on f6 positionally.

20 Nd7 forks those pieces. B X h7+ and a discovered check to open the h file? Looks too easy for a Friday.

Time to receive correction as needed...

Ah really? This is a Tuesday puzzle. Yes I got it but too easy for Friday IMHO

Premium Chessgames Member
  Oxspawn: I started with
20. Nxf7 and things went downhill from there.
Playing the game out, as described by <SimonWebb'sTiger> I was struck by the way that after 20. Nxd7, the white bishop, rook and queen conduct a stately dance with the King (who gavottes between h8 and g8) before the queen discomforts him on h7. It is a kind of ceremonial execution. No wonder black resigned. And no, <sombreronegro>, this is not a Tuesday puzzle. I can do Tuesday puzzles. I can only observe Friday puzzles.
Premium Chessgames Member
  kevin86: Black's position is horsemeat.
Jun-27-14  Chess Dad: I saw 20. Nd7, but wasn't expecting Qc7, and I'm not sure what I would have played in response. I clicked through too quickly after seeing that I had move 20 correct.
Premium Chessgames Member
  chrisowen: Bad for d7 won key in flight a knight at fly f6,

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Jun-27-14  kjr63: 20.Nd7 Nf4 and takes a rook with a check
Premium Chessgames Member
  agb2002: The material is identical.

Black threatens 20... bxc4.

The first idea that comes to mind is 20.Bxh7+, but after 20... Nxh7 21.Qh5 Ndf6 22.Qh4 Rfd8 23.Ng4 bxc4 25.Nxf6+ Bxf6 26.Qxh7+ Kf8 27.Ba3+ Ke8 White is one piece down and the black king seems to escape. This suggests 20.Nd7, trying to divert the knight on f6 or to remove one of them:

A) 20... Nxd7 21.Bxh7+ Kh8 22.Bb1(c2..g6)+ Kg8 23.Rh8+ Kxh8 24.Qh5+ Kg8 25.Qh7#.

B) 20... Qc7 21.Bxh7+

B.1) 21... Nxh7 22.Qh5

B.1.a) 22... Ndf6 23.Nxf6+ and mate next.

B.1.b) 22... f5 23.Nce5 Bh4 (23... Ndf6 24.Nxf6+ Rxf6 25.Qxh7+ Kf8 26.Qh8#) 24.Rxh4 Ndf6 25.Nxf6+ Rxf6 26.Qxh7+ Kf8 27.Qh8+ Ke7 28.Qxg7+ wins decisive material.

B.1.c) 22... f6 23.Qxh7+ Kf7 24.Nxf8 Bxf8 (24... bxc4 25.Qg6+ Kg8 (25... Kxf8 26.Rh8#) 26.Rh8+ Kxh8 27.Qh7#) 25.Ne3 + - [R+P vs B] and attack.

B.2) 21... Kh8 22.Bb1+ Kg8 23.Nxf6+ Nxf6 (23... Bxf6 24.Rh8+ and mate in two; 23... gxf6 24.Qg4#) 24.d5

B.2.a) 24... bxc4 25.Bxf6 Rfd8 (25... gxf6 26.Qg4#; 25... Bxf6 26.Rh8+ and mate in two; 25... g6 26.Rh8#) 26.Rh8+ Kxh8 27.Qh5+ Kg8 28.Qh7+ Kf8 29.Qh8#.

B.2.b) 24... g6 25.Qe3 and the threat 26.Qh6-27.Qh8# looks decisive.

C) 20... Nf4 21.Qc2 (with the double threat 23.Nxf6+ followed by 24.Qxh7# and 23.Nxb8) 21... Nxh3+ 22.gxh3 g6 23.Nxb8 bxc4 24.bxc4 Rxb8 25.d5 + - [Q+P vs R+N].

Jun-27-14  Cheapo by the Dozen: I might need a board to play through the last bit of <agb2002>'s analysis. ::sigh:: My calculation abilities are NOT what they were 4 decades ago ...
Jun-28-14  TheBish: Christiansen vs J B Campos-Moreno, 1980

White to play (20.?) "Difficult"

Material is even. White has a knight under attack, but maybe can ignore that with a direct assault on h7, as two pieces (Bb1 and Rh3) are aimed there already, and the White queen is ready to join the party.

Candidate moves: Bxh7+, Nd7

The problem with 20. Bxh7+ Nxh7 21. Qh5 is 21...Ndf6, stopping the attack dead in its tracks. A better try is 20. Bxh7+ Nxh7 21. Nd7, but Black has 21...Nf4! 22. Qc2 Nxh3+ 23. gxh3 Qf4 and the attack is killed.

20. Nd7! is the right move order. Now:

(A) 20...Nxd7 21. Bxh7+ Kh8 22. Bf5+! Kg8 23. Qh5 f6 24. Bxe6+ Rf7 25. Qh8#.

(B) 20...Nf4 21. Qc2! Nxh3+ 22. gxh3 Be4 23. Nxf6+ Bxf6 24. Qxe4 g6 25. Ne5 and White has two pieces for a rook.

(C) 20...Qc7 21. Bxh7+! and wins, e.g. 21...Nxh7 22. Qh5 Ndf6 23. Nxf6+ and mates, or 21...Kh8 22. Nxf6 Nxf6 23. Ne5 and White's attack continues, a pawn up.

Premium Chessgames Member
  agb2002: <Cheapo by the Dozen: I might need a board to play through the last bit of <agb2002>'s analysis. ::sigh:: My calculation abilities are NOT what they were 4 decades ago ...>

I do use a board to solve the puzzles (without moving the pieces, of course). My eyes get very tired when I try to use the diagram only.

Jun-10-16  Howard: I don't know where else to post this inquiry, so I might as well do it on this page.

Why were Browne, Kavalek, and Robert Byrne--of all people--absent from the U.S. team at the 1980 Olympiad. There obviously must have been SOME concrete reason, but I don't know why.

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