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Margeir Petursson vs Branko Damljanovic
New York Open (1988), New York, NY USA
Old Indian Defense: General (A53)  ·  1-0



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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Feb-26-16  backyard pawn: At the final position, would 59. f5, creating an unstoppable passed pawn, be a good move for white?
Feb-26-16  backyard pawn: Hmmm, Black, ...Rf1+ kind of messes up the move in my previous post. So I guess I answered my own question.
Feb-26-16  dfcx: OK black is about to play e1=Q#, white must check all the way to win.


A. 54...Kxf8? 55.d8=Q+ Kf7 56.Qe8+ Kg7 57.Qg8#

The harder alternative for white
B. 54...Kg7 55.Rg8+ Kf7 56.d8=N+ Ke7 57.Re8+ Kd8

click for larger view

Now the black king seems to have escaped the mating net, but there is a silver lining for white. The white rook guards the e file preventing e1=Q#, but black still has Rf+ followed by e1=Q+ winning. White can trade the rook for N+P now and win the 2N+P against the rook. But white should try a few more moves,

58.Nf7+ forces the king away from the king side

B1. 58...Kc5 59.Rc8+ Kb4/Kb5/Kb6 60.Rb8+ wins the rook and game B2. 58...Kc7/Kc6 59.Rxe2 Nxe2 60.Kxe2 and white will win the end game

click for larger view

Premium Chessgames Member
  Bubo bubo: Black threatens e1Q#, and since neither 54.Re8 Rf1+ 55.Ke3 e1Q+ nor 54.d8N+ Ke7 seem to work, White has to try 54.Rf8+.

Since Black must not allow White to queen his pawn with check, he has to play Ke6 or Kg7. On the former 55.Re8+ Kf5 56.Rxe2 removes the dangerous black pawn while White still threatens promotion and is up two pawns. On 54...Kg7 I only see 55.Rg8+ Kf7 56.d8N+ Ke7 57.Re8+ Kd6 58.Rxe2 Nxe2 59.Kxe2 with White having two knights plus pawn against a rook, which does not look like an easy win, so I probably missed something ;-).

Premium Chessgames Member
  WorstPlayerEver: @dfcx I beg to differ when it comes to your comment at White's 58th move.

58. Nf7 forces the BK to the c-file. And it wins a tempo to play Ne5 in some variations, as well it makes sure Black can't attack that N with their king on the next move. So White has their hands free to dismantle Black's pawn e2 without any trouble. On the queen side it sets a trap for Black's Rook on b1, by the way, because Black cannot play Kb6 otherwise White plays Rb8 check.

Little wonder I didn't find 58. Nf7

Premium Chessgames Member
  thegoodanarchist: Desperado rook! Cool
Premium Chessgames Member
  paulalbert: I was reasonably sure that an underpromotion to N with check had to be part of the solution, but totally missed the untakeable desperado R offer on f8 with check first so that promotion to Q with check is threatened and the N underpromotion with check ( after Rg8ch forces black's K back to f7 ) now leads to a winning position, but correct followup after 56 d8Nch not easy to see either ( at least for me ).
Feb-26-16  YetAnotherAmateur: The variation I looked at for a while, that turns out not to work:

54. Rf8+ Kg7
55. Nh5+

Now, there are some responses to that which definitely don't work, like

55. ... Kh7??
56. Rf7+ Kh8
57. d8=R# (or d8=Q#, but the rook has more panache)

But black can work his way out at this point, with:

55. ... gxh5
56. Rg8+ Kf7
57. g6+ Ke6
58. d8=N+ Ke7 and white has nothing left.

So yeah, be careful when sacrificing everything.

Premium Chessgames Member
  patzer2: For today's Friday solution I got as far as 54. Rf8+ Kg7 55. Rg8+ Kf7, but I took the easy way out via a draw by perpetual with 56. Rf8+ Kg7 57. Rg8+ Kf7 58. Rf8+ =.

I considered the possibility of under promotion with 56. d8N+, but I stopped after visuzlizing 58... Kc7 (diagram below),

click for larger view

What I missed here (diagram above) is that White is winning after the exchange sacrfice 59. Rxe2! (the computers delay it for one move with 59. Re7+ followed by 60. Rxe2 ) 59...Nxe2 60. Kxe2 (+5.41 @ 21 depth, Deep Fritz 15).

For a Black improvement, instead of 12...bxa4 allowing 13. Nxa4 (+0.75 @ 21 depth, Deep Fritz 15) the computer suggestion 12...Nc4 = to (+0.28 @ 21 depth, Deep Fritz 15) might be worth a try.

This is a good game to go over to see how a strong GM squeezes small advantages until they become decisive. Note for example how White slowly but surely increases his advantage after 13. Nxa4+ , until Black finally concedes a decisive pawn after 42...Rde7 (other moves are also losing according to the computers) 43. Rxd6 (+2.33 @ 21 depth, Deep Fritz 15).

Premium Chessgames Member
  Jimfromprovidence: <Dr.J> <As always, <agb2002> gives some great variations (B.3 is a lovely find), but I'm not yet completely convinced by B.2 <55... Kf5 56.Rxe2 Nxe2 (56... Rb8 57.Re8 wins) 57.d8=Q > Black could try 56...Nc6. Then 57.Rc2 Nd8 58.Rc8 Ne6 59.d8/Q (59.Re8? Rd1) Nxd8 60.Rxd8 Kxf4.>

After 56...Nc6, why not simply 57 Re8, below, seeing 58 Rc8?

click for larger view

Premium Chessgames Member
  Jimfromprovidence: In the text line, if 58...Kc6, then superficially there is a trap.

click for larger view

Because if 59 Rc8+?, then 59 Kb7 looks like it costs white a piece.

click for larger view

Premium Chessgames Member
  kevin86: The desperado rook reminds me of the Steinitz game earlier this week. The knights rule!!
Feb-26-16  YetAnotherAmateur: <Jimfromprovidence> From your final position:

60. Nd6+ Ka7 (Ka6? 61. Ra8+ Kb6 62. Rb8+ Kc7 63. Rxb1 )

61. Re8

and I think white was at least no worse than the game line. What might I be missing?

Premium Chessgames Member
  Jimfromprovidence: <YetAnotherAmateur> <60. Nd6+ Ka7 (Ka6? 61. Ra8+ Kb6 62. Rb8+ Kc7 63. Rxb1 )

61. Re8

and I think white was at least no worse than the game line. What might I be missing?>

The other major threat black had all along beside ...e1Q#; in this line it's 61...Rf1+.

click for larger view

Feb-26-16  RandomVisitor: After 53.f5! white is winning

click for larger view


+8.04/22 53...Rd8 54.Rc8 Rxd7 55.Nxd7 Nxf5 56.Ne5+ Ke7 57.Nxg6+ Kd7 58.Rf8 Ng3 59.Ke1 Ne4 60.Rg8 h3 61.gxh3 Kd6 62.h4 Ng3 63.Re8 Nh5 64.Kxe2 Ng7 65.Re7 Nf5 66.Rf7 Nd4+ 67.Kd3 Nb5 68.Nf4 Ke5 69.g6 Nd6 70.g7 Nxf7

+9.36/22 53...Nxf5 54.Rc8 e1Q+ 55.Kxe1 Rb1+ 56.Kd2 Rb6 57.d8N+ Ke7 58.Nd5+ Kd6 59.Nxb6 Ke5 60.Nf7+ Ke6 61.Nh6 Ne7 62.Rc4 Kd6 63.Rxh4 Kc5 64.Na4+ Kb5 65.Nc3+ Kc5 66.Re4 Nc6 67.Nf7 Nd4 68.Kd3 Nf5 69.Rc4+ Kb6 70.Ne5 Ne7

+9.39/22 53...e1Q+ 54.Kxe1 Nxf5 55.Rc8 Rb1+ 56.Kd2 Rb6 57.d8N+ Ke7 58.Nd5+ Kd6 59.Nxb6 Ke5 60.Nf7+ Ke6 61.Nh6 Ne7 62.Rc4 Kd6 63.Rxh4 Kc5 64.Na4+ Kb5 65.Nc3+ Kc5 66.Re4 Nc6 67.Nf7 Nd4 68.Kd3 Nf5 69.Re6 Nh4 70.g3 Nf5 71.Ne4+ Kb4

+9.39/22 53...e1R 54.Kxe1 Nxf5 55.Rc8 Rb1+ 56.Kd2 Rb6 57.d8N+ Ke7 58.Nd5+ Kd6 59.Nxb6 Ke5 60.Nf7+ Ke6 61.Nh6 Ne7 62.Rc4 Kd6 63.Rxh4 Kc5 64.Na4+ Kb5 65.Nc3+ Kc5 66.Re4 Nc6 67.Nf7 Nd4 68.Kd3 Nf5 69.Re6 Nh4 70.g3 Nf5

+9.39/22 53...e1B+ 54.Kxe1 Nxf5 55.Rc8 Rb1+ 56.Kd2 Rb6 57.d8N+ Ke7 58.Nd5+ Kd6 59.Nxb6 Ke5 60.Nf7+ Ke6 61.Nh6 Ne7 62.Rc4 Kd6 63.Rxh4 Kc5 64.Na4+ Kb5 65.Nc3+ Kc5 66.Re4 Nc6 67.Nf7 Nd4 68.Kd3 Nf5 69.Re6 Nh4 70.g3 Nf5 71.Ne4+

+250.00/22 53...gxf5 54.Rc8 e1Q+ 55.Kxe1 Rb1+ 56.Kd2 Ne6 57.Re8 Rb4 58.Rxe6 Rd4+ 59.Kc3 Rd1 60.Re8 f4 61.d8Q Rxd8 62.Rxd8 Kg6 63.Rg8+ Kf5 64.Rh8 f3 65.gxf3 h3 66.Rxh3 Ke5 67.g6 Kd6 68.Rh4 Kc7 69.g7 Kc6 70.g8Q Kd6 71.Qe6+ Kxe6

Feb-26-16  BOSTER: < Dr.J: 55...Kf5>. After 54...Ke6 < agb2002 : 55.Re8+>? White can play 55. d8= N+
So, if 55...Kf5 56. Nd5+ Ke4 57. Nc3+
if 56...Kg4 mate in two.
Premium Chessgames Member
  patzer2: White's 42nd move (diagram below) might make for a good weekend puzzle:

click for larger view

Here the move played with 42. Ng4 (+1.87 @ 21 depth, Deep Fritz 15) appears to be winning.

If 42. Ng4 is followed by 42...Nxc6?, then 43. dxc6 Rc7 44. b5 wins easy with the two connected passers.

Feb-26-16  jffun1958: 59. Rc8+ Kb4 (59. ... Kb5 or 59. ... Kb6 60. Rb8+ skewers the black rook) 60. Rb8+ Nb5 61. Kxe2
Feb-26-16  Patriot: Like <patzer2>, I saw the draw but no win.

From a practical standpoint, 54.Rf8+ is the only move I see given black's threat that white cannot survive. So OTB, play the darn move and think about it a little more later! Of course, I was too drawn into what might happen and looked at the knight promotion. I also figured ...Ke6 Re8+ and Rxe2 eliminating black's killer threat and promoting the pawn.

Feb-26-16  stst: Either side got a promoting pawn, but, even if White goes first, Black's promotion is mate at once. So White has to stop that first, by a R-sace, to give a check first, then promote its own, and follow through to deliver a mate first:

Rf8+ KxR
d8=Q+ Kf7 (e7 or g7 more vulnerable to a N-Q mate) Qe8+ Kg7

etc etc and White should prevail (on the road, not easy to figure the full course....)

see how the game actually unfolds.....

Feb-27-16  Dr. J: <BOSTER: After 54...Ke6 White can play 55. d8= N+. So, if 55...Kf5 56. Nd5+ Ke4 57. Nc3+>

After 57...Kd3 White is out of checks, and while 58.Nxe2 Nxe2 looks favourable for White, it's still unclear. Also Black has 55...Kd6 or 55...Ke7, and the win still has to be proven.

More certain seems to be <Jimfromprovidence>'s 55.Re8+ Kf5 56.Rxe2 Nc6 <simply 57 Re8, seeing 58 Rc8>. I had seen only that 57...Rd1 stops 58.d8/Q, but it loses to 58.Rc8.

Feb-27-16  BOSTER: < Dr. J 58. Nxe2>. After 57... Kd3 58.Nxb1, not Nxe2.
If 55...Ke7 56.Re8+ Kd6 57.Nf7+
If 55...Kd6 56.Nf7+
Feb-27-16  CHESSTTCAMPS: In this ending, material is even and both sides have pawns about to queen. Having the move would seem to favor white, but the evident difficulty is that if white promotes to queen without check, black can promote to queen with mate! The most direct way to address this problem is

54.Rf8+! and the rook can't be taken:

A. 54... Kxf8? 55.d8=Q+ Kf7 (Kg7 56.Qg8#) 56.Qe8+ Kg7 57.Qg8#

B. 54... Ke7? 55.d8=Q+ Ke6 56.Qd7#

C. 54... Ke6 55.Re8+ Kf5 56.Rxe2 (56.d8=Q?? Rf1+) Nc6 (Rb8 57.Re8) 57.Rc2! Nd8 58.Rc8 Ne6 (Nb7 59.Rb8! wins) 59.Nd5! and the threat of d8=Q wins.

C.1 55... Kf7 56.Rxe2 Nc6 56.Rxe2 Nc6 57.Rc2 is winning as in main line,

D. 54... Kg7 55.Rg8+ Kf7 56.d8=N+! Ke7 57.Re8+ Ke6 58.Rxe2 Nxe2 (otherwise black is N+P down) 59.Kxe2 Ke7 60.Nc6+ Ke6 61.Nd4+ K-moves 62.Nf3 wins h-pawn and the game.

D.1 59... Rb3 60.f5! gf 61.g6 Rg3 62.g7 Rxg7 63.Ne8+ Ke7 64.Nxg7 Kxd8 65.Nxf5 wins

D.2 59...Rb8 60.Nf7+ Ke6 61.Nh6 keeps the king out of f5 and appears winning.

Time for review...

Feb-27-16  CHESSTTCAMPS: Close, but I missed the real coup-de-grace, 58.Nf7+!!
Feb-28-16  Dr. J: <BOSTER: After 54...Ke6 White can play 55. d8= N+. So, if 55...Kf5 56. Nd5+ Ke4 57. Nc3+ and after 57... Kd3 58.Nxb1, not Nxe2.> Oops. Of course you're right.

<If 55...Ke7 56.Re8+ Kd6 57.Nf7+> and we have transposed back to the game continuation, where Black should play ...Kc7, but still loses.

<If 55...Kd6 56.Nf7+> Sorry, I don't see the point of that. Doesn't 56...Ke7 win a piece? And even 56...Ke6 looks plausible.

Thanks for continuing the conversation.

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