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Per Naesby Andreasen vs Hugo Falberg
Aalborg op (1992), rd 5
Queen's Gambit Declined: Cambridge Springs Variation (D52)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Sep-24-12  Djoker: <LTJ> I liked 38.Nd5 till I was thinking about RxR etc. But a better line for white is plain Kxd5 39.Rxg7 f6(then e6) with same idea as in other declined variations.

I guess game line is the best.Rook can't be declined.

Sep-24-12
Premium Chessgames Member
  FSR: A Monday with no queen sac! All I see is 58.Rxg7 Kxg7 (58...cxb4 59.Rf7+! Kg8 60.f6 wins; even 59.axb4 is quite sufficient) 59.Ne8+ and 60.Nxc7, winning easily.
Sep-24-12
Premium Chessgames Member
  FSR: There's no making us CG.com'ers happy. If you always have a queen sac on a Monday, we bitch about that. If you ever have a Monday without a queen sac, we bitch about that.
Sep-24-12  scormus: Monday, so Q-sac .... Problem, no Q. What'sthe next biggest piece? OK R-sac, so 58 Rxg7 Kxg7 Ne8+ and W has a completely won endgame. Well, a won endgame anyway.

Er .... hang on a moment, is it definitely won? What if 58 ... c4? Yes, it is definitely won. Probably, I think.

Er ..... this is <Monday> isn't it?

Sep-24-12  GauraNitai: No queen. So if it ain't a rook sac, it's not Monday. Obviously we got the days of the week confused. So sac your rook and Ne8+! Something that most pros won't see far ahead, as a knight very rarely forks at the eighth rank. But here it's only your second move, so no probs. In fact, you must count on it. The beauty lies in the fact that black loses another pawn - forcibly - and gives white the reins to victory. More like a Tuesday, though.
Sep-24-12  LoveThatJoker: <Djoker> Stockfish confirms that my line is fully winning: 58. Rxg7! Nd5 59. Rxc7

It very much likes your line as well: 58. Rxg7! Nd5 59. Kxd5

:)

LTJ

Sep-24-12
Premium Chessgames Member
  OhioChessFan: Looks like Black had some time trouble issues to play it out to move 60. In any case, the Knight fork is a pretty standard tactic. A centralized White Knight, a Black King not behind a couple Pawns, a loose Black Rook, has got to add up to trouble.

For anyone who might be interested, Bilbao Moves Prediction Contest, sponsored by the legendary <chessmoron> and hosted in my forum, is now open. First round begins Monday, September 24. Click on Elvis for details.

Sep-24-12  Abdel Irada: [Exhumes Elvis and clicks on him]

Hey! What are you arresting me for? I'm only trying to join the move-prediction contest.

&#^$ed spoilsports!

Sep-24-12  gofer: I still can't beat <Crafy EGT>.

I know I am pretty useless at endgames, but the horrendous N v N variations are just painful. Even, when I get a full two pawns up the nasty robot has only done so to get his king in front of them and to swap off into a <K + N v K> draw...

Sep-24-12
Premium Chessgames Member
  paulalbert: The R fork part was easy, but winning after 60...c4 definitely is going to require some proper technique. My first attempt against the computer I wound up with a K + N vs. K draw.
Sep-24-12
Premium Chessgames Member
  NM JRousselle: This was a very good positional game. I played over the game quickly, but need to go back and see where Black went wrong. I think Capablanca would have loved this one.
Sep-24-12  PinnedPiece: Pretty sophisticated move for a Monday. Normally I allot 30 seconds for par on Monday. Today I took two minutes....having seen the knight fork potential after the 57th move for white, but it didn't seem like Monday solution, and had to check and recheck for something simpler...

If this had been Thursday I would not have doubted the rook sacrifice!

But to follow my scoring guidelines I have to put this in the Monday - Fail column!

.

Sep-24-12
Premium Chessgames Member
  kevin86: White simplifies and gains two pawns. He will win easily.
Sep-24-12
Premium Chessgames Member
  chrisowen: A path why it rookxg7, looks for hi damage knight fork looms it e8 in seems it if black declines it then f6 and e6 lead the charge for

intrinsic value c4 winds up tempi short in reaching rank so narrow

gauge nd5 also allows king penetration and pawns will flow my line

grows it a6 raid in <58.Rxg7 Kxg7 59.Ne8+ Kf7 60.Nxc7 c4 61.e6+!>

when dark retreats allowing f6 rise in shunt the knight push on with

c3 both win for white since a6 gets picked up king shuttle knight

just technique it reason advanced couple bring home the baco whiles

taking care c3.

Sep-24-12  et 9: Did anyone get 60. ....c4 as winning for black? "Once" presented a few choices early on. Didn't run it through an engine yet. Can black win?
Sep-24-12
Premium Chessgames Member
  agb2002: The material is equal.

The white knight can fork the squares c7 and g7. This suggests 58.Rxg7:

A) 58... Kxg7 59.Ne8+ Kf7 60.Nxc7

A.1) 60... c4 61.Nxa6 c3 62.Nc5 c2 63.Nb3 + - [2P].

A.2) 60... cxb4 61.axb4 and the a-pawn is lost.

B) 58... c4 59.f6

B.1) 59... c3 60.fxe7+ Rxe7 61.Rxe7 Kxe7 62.Nf5+ followed by Nd4 and Kd3 + -.

B.2) 59... Nd5 60.Rxc7 Nxc7 61.Nf5 + -.

Sep-24-12  gofer: Finally, managed to find a win...

58 Rxg7 Kxg7
59 Ne8+ Kf7
60 Nxc7 c4
61 Nxa6 c3
62 Nc5 c2
63 Nb3 Nc6
64 Nc1! Ne7
65 a4! bxa4
66 b5 a3


click for larger view

White has positioned just enough pieces to bully the black knight around the board...

67 f6! Nc8
68 Kf5 Nb6
69 e6+ Ke8
70 Kg6 Kf8
71 Kxh6


click for larger view

Its all over. Black starts to throw in the towel!

<But by far the "best" Monday in ages. A forced win in 14 moves!>

Sep-24-12
Premium Chessgames Member
  Once: <et 9: Did anyone get 60. ....c4 as winning for black?>

I ran it through Fritzie. After 60...c4, he finds five moves which give white a clear advantage - 61. e6+, Nxa6, f6, Ne6 and Kf4.

The killer line (which I most certainly didn't find in human mode) is 61. e6+ Kg7 62. Nd5!


click for larger view

This just looks wrong, swapping off knights and letting the black c4 passer run, but Fritzie has it all under control.

62... Nxd5 63. Kxd5 c3 64. e7 Kf7 65. Kd6 c2 66. Kd7 c1=Q 67. e8=Q+ Kf6 68. Qg6+ Ke5 69. Qe6+ Kd4 70. Qd6+ Ke4 71. f6


click for larger view

White runs the extra prawn into queen and that's all she wrote. If black starts to get too frisky, white can always check the black king into submission.

So I'm afraid that black can't win with best play. It's still all a bit unclear for a Monday though.

Sep-24-12  stst: White will prevail, but not too interesting.
58.f6 gxf6
59.exf6 Ng8
60.f7 Ke7
61.Ne7 Nf6
62.Rc6 Rg8+
63.Nxg8 fxg8=Q+
and White should be on the way to win.
Sep-24-12  Checker2: I took up gofer's challenge and had a difficult time with winning against the web endgame machine, needing many start-overs all following the 60. ...c4 line. That dark knight was too frisky. I managed by slowly picking up the black pawns. My knight captured a6, then parked for a long time on d3, protecting the c1 queening square and the e5 pawn (from the king at least) at the same time. My king took the b then c pawns while black's knight picked up the f and h pawns. Then my king took the h pawn before it queened and now had my knight plus three pawns versus knight only but it was still something like move 100 before I mated. Black took one of promoted pawns with his knight, so in a tenuous stretch, there's a queen sac as some were missing. Certainly not your typical forced mate in three type Monday.
Sep-24-12  Patriot: <gofer> It definitely was not easy but I beat Crafty after several tries. One thing is for sure...blitzing out moves against it doesn't work very well!
Sep-24-12  QueenMe: I saw the most "interesting" move for white - 58) ♖xg7 (and arguably perhaps even the "best" move #58), but wrestled with many other moves because I had trouble seeing a clear decisive win for White with it. I agree with <PhonyBenoni> that Black still has plenty of fight left in him with 60) ... c4, and with <Abdel Irada> that <the virtue of this combination is not material gain, but the clearing of a path for White's advanced passed pawns>.

One thing's fer sure: CG has certainly "stirred the drink" here for a Monday puzzle!

Sep-24-12  Abdel Irada: <PinnedPiece>: <But to follow my scoring guidelines I have to put this in the Monday - Fail column!>

Why? Given that not all Monday puzzles are of equal difficulty (as this case certainly proves), and given that over the board one would presumably take extra time in a crucial position to find a win, I see no reason why you can't give yourself some leeway.

Sep-24-12
Premium Chessgames Member
  Tiggler: <Lostin Space>:<But is not obvious if this position is won easily. Blacks c-pawn is dangerous after 60. c4.>

Not a problem. W Knight has plenty of time to take off the a-pawn and still catch the c-pawn. After that, it's all over.

Sep-24-12  dufferps: Clearly 58. ... Kxg7 is a losing move for black. He does better to immediately threaten queenside promotion -- 58 ... c4 or 58 ... cxb4. But white's central pawns, particularly the e-pawn, will still enable him to prevail.
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