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Slavko Cicak vs Alexey Khruschiov
Olympiad (2008), Dresden GER, rd 10, Nov-23
English Opening: Agincourt Defense. Wimpy System (A13)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Aug-02-10  SuperPatzer77: <widjaja70: if only 45.... Kg8! instead of Kh8, then white loose the game since he cannot play 48. Nf8!>

<widjaja70> Yes, indeed. Black missed 45...Kg8! = to prevent 48. Nf8!.

White's not able to win the game because Black's dangerous d-pawn threatens to go queening.

Thus, White is forced to check Black King repeatedly by 46. Qe8+ =.

Poor Alexey Kruschiov! He missed 45...Kg8! =.

SuperPatzer77

Aug-02-10
Premium Chessgames Member
  kevin86: I thought this puzzle was a mistake;the position is hopeless for white,black has a breakaway pawn at e2-and there are too many pieces for a stalemate trap.

Then I saw the totally useless queen sac at h7-followed by the knight fork that regains it at no gain-black will queen and win.

Then the solution:reverse the moves:Nf8 threatens mate AND the queen. Black cannot protect from both.

A unique Monday puzzle-simple AND brilliant!!

Aug-02-10  jussu: What I find is not very difficult but still pretty long: 48. Nf8 Kg8 49 Nxd7 d1=Q 50. Qe8+ Kh7 51. Nf8+ K?8 52. Ng6+ Kh7 53. Qh8#. Makes me wonder whether there is an even simpler solution, but I don't see any.
Aug-02-10  Kinghunt: This was a particularly difficult Monday puzzle. The first move I considered was 48. Nf8, threatening to take the queen and mate on h7, but I discarded it because I saw that after 48...Kg8 49. Nxd7 d1Q, white actually isn't up any more material. This being a Monday puzzle, I simply stopped there and only returned to Nf8 after realizing no other moves work, and then discovered that 50. Nxf6 forces mate. This was more of a Wednesday-style puzzle in my opinion, with two key moves that need to be found instead of just one.
Aug-02-10  fouard: 48 Nf8. The only move avoiding Qh7 mate is Kg8, which proceeds:

49 Nxd7 d1=Q 50 Nf6+.

Now 50...Kf8 51 Qe8 mate or
50...Kh8 51 Qh8 mate.

Aug-02-10  howlwolf: If you back up a move it looks like47.. Qb7 holds the draw for black.
Aug-02-10  nateinstein: <widjaja70: if only 45.... Kg8! instead of Kh8, then white loose the game since he cannot play 48. Nf8!> Maybe, but White could take the perpetual if 45... Kg8 with Qe8+. I believe White played on because he knew 45... Kh8 was a blunder.
Aug-02-10  rapidcitychess: I think chessgames.com heard our cry of "too easy!" Fun puzzle.
Aug-02-10
Premium Chessgames Member
  Check It Out: 48. Nf8 jumps out, threatening mate at h7, so
48...Kg8 49. Nxd7, then, if
49...d8(Q) 50. Nxf6+ and mate follows:
50...Kh8 51. Qh7# or
50...Kf8 51. Qe8#
Aug-02-10
Premium Chessgames Member
  Check It Out: I missed a few things on this one, and obviously 49...d1(Q).

Great Monday puzzle, more like a Tuesday puzzle. If chessgames is exacting revenge for an easy last week, and all puzzles will have the difficulty level of the next day, what will the Sunday puzzle be called?

Aug-02-10  rapidcitychess: A February 30th puzzle? :)
Aug-02-10  cjgone: Took me longer than a normal monday puzzle. :[
Aug-02-10  Julian713: Excellent puzzle! Not the typical "crazy sacrifice to set up mating net" puzzle...instead of moving the power piece to create the knight fork, you instead use the fork to create the net!
Aug-02-10  wals: Hard to fathom why Black played
23...Nb6. +1.81.
Available were:-

Analysis by Rybka 3 1-cpu:

1. = (-0.17): 23...Kh8 24.Red1 Qf4 25.Ncd6 Rcb8 26.Nf5 Qe5 27.Qd3 Rb6 28.Rf1 Rg8 29.f4 Qb8 30.Rf3 Re8

2. = (-0.14): 23...Ra6 24.Nb2 Rac6 25.Rb1 Bf7 26.Rec1 Ne5 27.f4 Nd7 28.Rf1 Nb6 29.Nd3 Qb7 30.Qf2

3. = (-0.08): 23...Rd8 24.Qd3 Ra6 25.Qd2 Bxc4 26.Rxc4 Re8 27.Rcc1 Qd8 28.f3 Rae6 29.Red1 Qb6 30.Kh1 Rb8 31.Qa2

4. = (-0.06): 23...Rf8 24.Nb2 Bf7 25.Nc4 Qf4 26.Ncd6 Rab8 27.Rcd1 Be6 28.Rd3 Kh8 29.Rf3 Qg5

5. = (-0.04): 23...Rc6 24.Nca3 Raa6 25.Qd2 Rc8 26.Qe2 Ra8 27.Nc4 Qf4 28.Nbd6

Recovered some ground when White played
36.Re4.+0.95. Better, Qxd4, +1.56.

41.g3. 0.00 was a blunder. Better,
Qc4 0.96.

Black, desperate for a loss, went for
45...Kh8 +3.25. Better, Kg8 +0.48, for a win.
46...Qc6+. +12.15, put the icing on the cake.

Aug-02-10  TheaN: Monday 2 August 2010

<48.?>

Target: 0:40;000
Taken: 0:17;964

Material: =

Candidates: Qh7, <[Nf8]>

-ML-
With Black's passed pawn, White is happy to stay at least on top with:

<48.Nf8> obviously, d1=Q leads to Qh7.

<48....Kg8 49.Nxd7> now Black's only move to stay in the game is to promote.

<49....d1=Q 50.Qe8 Kh7 51.Nf8 Kg8> this is a common pattern. Kh8 only allows Kh7 on the next move, now it allows both.

<52.Ng6 Kf7 (52....Kh7 53.Qh8 1-0) 53.Qf8 1-0> time to check.

Aug-02-10  TheaN: 1/1

Of course, with the Queen on e8, Kf7 is not possible at all, and Kh7 with Qh8 is the only variation. Nuff said.

Aug-02-10  carelessfills: Deep Fritz vs Kramnik, 2006 is the game where Kramnik missed this same mate in one!
Aug-02-10  Nullifidian: Since this is a Monday, I always look for the sacrifice first, but one can see at once that there are no sacrificial possibilities.

So what does that leave?

48. ♘f8! Δ ♕h7# and ♘xd7

Aug-02-10
Premium Chessgames Member
  wordfunph: 48.Nf8! i got it in 5.28 seconds.. :-)
Aug-02-10  M.Hassan: "very easy" White to move 48. Materials even
Black has a past pawn that is about to reach rank a and promote. White can go:

48.Nf8
If Black Knig does not move, next move it will be check-mated by Queen move to h7, so 48.........Kg8
49.Nxd7 d8=Q
50.Qe8+ Kh7 forced
51.Nf8+ Kg8/kh8 forced
52.Ng6+ Kh7
53.Qh8# and promoted Black Queen has stayed redundant. Time to check

Aug-02-10  M.Hassan: I would not have called this "very easy" puzzle. White has to make 6 moves to mate! Very easy??
Aug-02-10
Premium Chessgames Member
  patzer2: For today's Monday puzzle solution, 48. Nf8! combines a double attack tactic (threatening mate or the Queen) with a decisive mate threat. After 48...Kg8 (forced) 49. Nxd7 leaves White with a mate threat, so that if Black tries to promote to gain his Queen back it's 49...d8(Q) 50. Nxf6+ with mate-in-two as noted by <Check it Out> above.
Aug-02-10  turbo231: This is a very easy puzzle if............ Got the first move right. The black Queen had to sacrifice, now I'm one pawn up with a queen vs knight end game.

A piece of cake right? It would be very hard to lose this game wouldn't it? Once again I managed to snatch defeat out of the jaws of victory. I got greedy. I tried to get a quick mate, no patience, blundered and Houdini put me down. I hate to lose on Mondays.

Aug-03-10  Old Wolf: Interesting that a lot of people say that after Nf8, Kg8 is "forced" or "the only move". It's not even the best move.

(Black can also cover h7 with his queen).

Aug-03-10  EXIDE: Nxf6 is the clincher !! A little difficult for Monday puzzle, however I got it and enjoyed it.
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