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Loek van Wely vs Aleksej Aleksandrov
EU-ch 4th (2003), Istanbul TUR, rd 10, Jun-10
Nimzo-Indian Defense: Classical Variation. Keres Defense (E32)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Dec-16-09  Eisenheim: same as <WhenHarryMetSally>, except I went back to rc2 and finally visualized the fork. rxg4 had too many benefits to ignore both offensively by allowing the white pawn to promote and defensively by allowing the white king to block the black pawn promotion, so i stayed with it as the decisive move
Dec-16-09  zb2cr: Found this one quickly. I have nothing to add to the commentary already provided by <dzechiel>, <gofer>, <stacase>, and others.
Dec-16-09
Premium Chessgames Member
  johnlspouge: Wednesday (Medium/Easy)

Van Wely vs A Aleksandrov, 2003 (68.?)

White to play and win.

Material: N for B. The Black Kh4 has 3 legal moves and is vulnerable to 68.Rh8+ and 68.Rxg4+. The salient feature of the position is the presence of passed Ps: the White Pc6 and the Black Pd3. Presently, pieces support both Ps to the queening square, and the Black Pd3 has the advantage of acceleration by checks to the White Ke8, which might otherwise be an effective blockader. Thus, 68.Rxg4+ is an interesting candidate.

Candidates (68.): Rxg4+

68.Rxg4+ Kxg4 [else, drop Bb4]

69.c7 (threatening 70.c8=Q)

69…Rc2 70.Ne3+ K any 71.Nxc2 dxc2 [else, drop Rc2]

72.Kd2

The White Pc7 will queen; the Black Pc2 is dead in its tracks.

Dec-16-09  patzer2: For today's Wednesday puzzle solution, White cleverly combines the Passed Pawn and Knight Fork tactics to win after 68. Rxg4+!
Dec-16-09  cyclon: 68.Rxg4+ Kxg4 69.c7, and now -Rc2 gets 70.Ne3+.
Dec-16-09
Premium Chessgames Member
  Once: <firebyrd> Spot on!
Dec-16-09
Premium Chessgames Member
  kevin86: A brilliant finish! The only move black has to stop the pawn is 69...♖c2,punished by a fork!;70 ♘e3+
Dec-16-09  YouRang: That bishop is making black's promotion threat dangerous AND it is stopping white's promotion threat.

Get rid of it! <68.Rxg4+ Kxg4> Push the pawn! <69.c7> Game over!

The knight is sufficient to ensure that the pawn pawn promotes since 69...Rc2 is met by 70.Ne2+ forking K+R. Meanwhile, checks from black are easily shrugged off.

Dec-16-09  mrsaturdaypants: Alright, white wants to promote his c-pawn, and would have no trouble doing so except that black is geared to promote his d-pawn first. Black's rook and bishop are well placed to support the d-pawn's march, and are also in good position to hinder the c-pawn's journey.

I looked first at 68 Rxg4+, since that move takes out black's troublesome bishop with check. Now d2+ is not so deadly, and the c8 promotion square is uncovered. The problem is that Rc2 will stop the c pawn, and then white's down knight to rook in an inferior endgame.

Fortunately, 68 Kxg4 sets up a knight fork if black puts his rook on c2. So, 69 c7, and black has no way to stop the c-pawn. Since declining white's rook at move 68 achieves nothing, black is lost.

Time to check.

Dec-16-09
Premium Chessgames Member
  Jimfromprovidence: <Dr. J > <A hand-to-hand endgame for more than 50 moves! Black seems to be winning for most of the game. Where did he lose the win? the draw?>

Not sure if there was a win there, but he lost the draw with 67...d3 and not 67...Re2+.


click for larger view

If 68 Kd1, then 68...Bf3. If 68 Kf1, then 68...Rd2.

On a side note, if white had played 68 c7?? instead of the winning 68 Rxg4+, then 68...d2+ wins.


click for larger view

Dec-16-09  mrsaturdaypants: I didn't consider black's 69 Rb1+, which fortunately fails to 70 Kd2, preventing black's rook from taking over the c file. That would have been a great save, if white's king had been one space to the right. Of course, then black's 68 d2 would not have come with check. Chess is complicated.
Dec-16-09  TheChessGuy: Tactics are still important in endgames! Never miss a chance to throw a punch like 68.Rxg4+!
Dec-16-09  VincentL: I see that three or four others also opted for 69. Nxe3+ instead of 69. c7.

I saw it didn't work and threw in the towel - it was too late here to look at anything else.

Interesting how such a simple puzzle can fool so many.

Dec-16-09  WhiteRook48: 68 Rxg4+! how easier could you get?
Dec-16-09  Whitehat1963: I guessed right, but no, I didn't get it at all.
Dec-16-09  chesskidnate: surprised that a few people fell for 69 Nxe3, now i dont feel as bad for falling for it myself
Dec-16-09  GreenFacedPatzer: Bleh, missed it.

I thought 68 Ne3 worked, but I missed precisely how the black's d-pawn promotion threat would play out.

I considered 64 Rxg4+, but missed the fork threat which makes it work, so discounted the move.

Dec-16-09
Premium Chessgames Member
  doubledrooks: 69. Rxg4+ Kxg4 70. c7 (not 70. Ne3+ Kf3 71. c7 Kxe3 and black threatens Rb1+ and mate) wins, for if 70...Rc2 then 71. Ne3+ Kf3 72. Nxc2 dxc2 73. Kd2
Dec-16-09  Uncle Mark: it takes me about 3 minutes to find the correct way, that is rxB+,KxR; c7 and the pawn go to queen because the fork to K and R if Rc2. Nice
:-)
Dec-16-09  muralman: Wow, chessgames is doing a mea culpa for last week's brain cell killers. That was a pretty ending. The black rook is overworked. Taking out the black bishop, sacrificing the white rook, opened the pathway for the advanced C pawn.

Meanwhile, our white king seems to be in a bit of a pickle. Luckily, for this puzzle set up, with any defense the rook puts up against the queening of the C pawn, will cause it's removal.

Lets say the black rook takes the only real option and moves to C2. White answers with the knight fork.

Dec-16-09  wals: 67. Ke1...d3 (+ 7.40) as played

Rybka shows 67....Re2+(0.00)

and three cheers for Magnus the Magnificient.

Dec-16-09  BOSTER: I guess that <CG> has a lot more players who likes to read than who likes to write comments. Here some small remarks about today game.
When playing against strong players, you have clearly understand that pressing for wins in equal position often results in loosing. Black denied the draw by three times repetition (move55...Nb4 instead Nc2). 67....Rc1 is correct move. Keep the rook behind the passed pawn- Steinitz' rule, which is nice to know. d3- this is the blinder.
Dec-16-09  The Famous Chess Cat: Victory is Mine!
Dec-17-09  rotgut: <Once: The puzzle is to add one more black piece to any empty square on the board to create a position where black to move cannot prevent white from queening the pawn.>

A Black N on a8 will do the trick.

Dec-18-09  turbo231: I played rybka using Rxb but I checked the king with the my knight before I moved my pawn, bad decision. Rybka checkmated me. The puzzle works even against rybka if you move the pawn first (well in the first game the black king took the Rook) if the rook moves over you can fork the q and r and promote first. If the pawn checks your K you can out maneuver rybka's pawn and rook with your K. Funny thing I played against rybka a second time with Rxb but rybka refused to take the rook she moved down to h3, bad decision, because I still hadn't caught my mistake. If she had taken my rook she could have checkmated me again because I still didn't know that I needed to move my pawn first. But rybka saw that if she took my rook and I moved my pawn first the game was all over. She didn't catch that in the first game, even though I set the game for 16 minutes, which I think is plenty enough time for rybka. By the second game she mistakenly assumed that I had caught my mistake ( and her mistake also) so she refused to take my rook. What to do? Some one else would have probably done it better, but this is how my game came out. (1) Rg8xg4 kh3! (2) Ne3 protecting my rook-rb1+ (3) Kd2-rb2+ (4) Kc1 checking the rook at b2, rb5 (5) Kc1-d2 rb5-b2+ (6) Kd2xd3-rb2-b6 (7) Rg4-g6 rb6-b3+ (8) Kd3-e2 rb3-b8 (9) c6-c7, checking the rook at b8, rb8-c8 (10) Ne3-d5, protecting the pawn at c7, kh3-h4 (11) Rg6-d6 kh4-g5 (12) Rd6-d8 rc8xc7 (13) Nd5xrc7 the coup de grace. Rybka out smarted her self this time. She didn't know she was playing a real dummy. Then I played the game on java and saw my mistake, but in the second game it would've not worked. Because rybka wouldn't take the rook!
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