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| Aug-27-10 | | wladimirsky: <fischer2009: i prefer
Rc4 Nc4
d2!!
i wonder y nobody mentions dis>
After 30...d2 31.Ke2 |
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| Aug-27-10 | | wals: White strayed from the straight and narrow:-
(-3.20):29.c4.(depth 29). Much better,
Analysis by Rybka 4 x64: depth 23.
1. = (-0.23): 29.Ke1 Bb5 30.c4 Bxc4 31.Nxc4[] Rxc4 32.Rxd3 Rc1+ 33.Kd2 Rb1 34.Rd6+ Ke5 35.Rxh6 Rb2+ 36.Ke1 Rxa2 37.Rg6 Ke4 38.Rxg5 b5 39.Rg7 b4 40.Rb7 a5 41.g4 fxg4 42.hxg4 Kd3 43.Kf1 Rc2 44.g5 White plunges further into the mire:-
(-6.56):30.Nxc4. Better,
1.  (-3.20): 30.Rb1 Rc2[] 31.Ke1 Rxa2 32.f3 b6 33.Rc1 Bb5 34.f4 Rb2 35.Rc7 a5 36.Rb7 Bc6 37.Rh7 Kg6 38.Rh8 a4 39.Rd8 Be4 40.Rd6+ Kg7 41.Rd7+ Kf8 42.Ra7 b5 43.Kd1 gxf4 44.gxf4 Rc2 45.h4 2. (-3.57): 30.f3 Rc1+ 31.Kf2[] Rh1 32.Rb2 Rh2+ 33.Ke1 Re2+ 34.Kd1 Rxe3 35.g4 Re2 36.a3 Rh2 37.Ke1 Rxh3 38.Kf2 Ke5 39.Nf1 fxg4 40.fxg4 Kd4 41.Rb1 h5 42.gxh5 White was outclassed. |
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| Aug-28-10 | | TheRavenPK: ..forget my earlier post, now I just glanced on the position and saw 29..Bxc4 30. Rxb7 with a strong rook.. I am really in a bad shape, for about a month I really can't play chess..... |
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Aug-28-10
 | | kevin86: Black threatens to queen (at the expense of the rook) and the rook after move 30,either way,white is rooked. |
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| Nov-12-20 | | Walter Glattke: King is far-pinned, 29.-Rxc4 30.Nxc4 d2 31.Ke2 Bxc4+ 32.Rd3 d1Q+ 33.Kxd1 Bxd3 1 piece 30.Rxd3 Rc1+ 31.Ke2 Bxd3+ 32.Kxd3 Rh1 wins. Me and Rybka and Tarrasch play 29.Ke1 by far pinning diagonal. |
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| Nov-12-20 | | Walter Glattke: Black wins the ending by threatening a5-b5 breakthrough and -Kf3 breakthrough, the white king is overloaded after 29.-Rxc4 30.Nxc4 d2 31.Ke2 Bxc4+ 32.Kxd2 Bxb3 33.axb3 Ke5 as after the match continuation. 34.f3 a5 35.Kd3 h5 I found out, not the change combinaison, but the following ending decides the match in several variations. |
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| Nov-12-20 | | Brenin: This was easy for a Thursday, the exchange sacrifice being obvious since the N is a better blockader of the d-pawn than the R. A passed a-pawn will eventually decide the resulting K&P endgame in Black's favour. |
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| Nov-12-20 | | saturn2: After 29...Rxc4 30. Nxc4 Bxc4 black can give up 31. Ke1 Bxb3 32. axb3 Ke5 or
31. Rb1 d2+ 32. Kg1 Be2 or
31. Rb2 (Rxb5) d2+ 32. Kg2 d1 |
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| Nov-12-20 | | malt: Have 29...R:c4 30.N:c4 B:c4
(30...d2 31.Ke2 B:c4+ 32.K:d2 B:b3 33.ab3 )
31.Ke1 B:b3 32.ab3 Ke5 |
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| Nov-12-20 | | saturn2: <Phony Benoni There are plenty of ♔+♙ endings with an extra pawn that are drawn> In this gane the white king is on the first line while the advanved black king is active and controlls eventual passed pawns on the king side. Morover black can create another passer on the a file So one can either calculate a lot or just give it a glance and say black wins after 33...a5 |
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Nov-12-20
 | | Messiah: I tried to make 29...b5 work, with the idea of putting the Bishop on the a8-h1 diagonal, with some deadly checks on the 1st rank. No success. |
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Nov-12-20
 | | HeMateMe: 3 seconds, very thematic. The resulting pawn endgame is lost. |
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| Nov-12-20 | | TheaN: This Thursday puzzle is divided in two parts, imo. We have the simplifying combination <29....Rxc4! (Bxc4? 30.Nxc4 Rxc4 31.Rxd3 =) 30.Nxc4 (else Rc2 -+) Bxc4 31.Ke1 (else d2 -+) Bxb3 32.axb3 Ke5>:
click for larger view
Leading to this. The second part is, how to conclude this pawn endgame. Key to these pawn endgames with a pawn up is to create a far passer if possible, and try to prevent the opponent from creating one. Black cannot do the latter in this position as White has a majority on the king side, and the former takes three moves to prepare (a5, b5, a4). Nonetheless Black wins by combining the ideas. <33.f3>, the only move that prevents Ke4; if Black can get Ke4 in <without> White capturing Pd3 or create a passer Black will simply win by creating the queen side passer. <33....g4!>
click for larger view
Black foregoes setting up the queen side passer as he has all the time to do so. This forces White's hand, as Black threatens two pawns and fxg4 gives up control of e4. <34.hxg4 fxg4 35.f4+ Ke4 36.Kd2>
click for larger view
Even though White prevented Black from creating a passer yet and has a passer of his own, Black wins after <36....a5>, as White doesn't have time to neutralize the threats on both wings. After <37.f5 Kxf5 38.Kxd3 Ke5> White has no more play besides the lost race <39.Kc4 Ke4 40.Kb5 Kxe3 41.Kxa5 Kf3 42.Kb6 Kxg3 43.Kxb7 h5 44.Kc7 h4 45.b4 h3 46.b5 h2 47.b6 h1Q 48.b7>
click for larger view
followed by simplification extraordinaire <48....Qxb7+ -+>. |
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| Nov-12-20 | | Walter Glattke: Nice, on the board I also had an ending with simplification and an extra pawn for black at the king'swind, most endings will see this one, or an a-pawn would run through. |
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Nov-12-20
 | | chrisowen: Public no ah grief no |
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| Nov-12-20 | | landshark: For someone who regards himself <endgame challenged> I passed both tests this puzzle presented: First, the sham exchange sac to simplify, then the endgame puzzle after 33.f3. When I played thru the game as played, I wondered if my choice of 33....g4 was a mistake, but some very reliable commentators here don't think so.... |
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| Nov-12-20 | | Mortadulo: It is not too difficult to notice that removing the pieces and placing White's King on e4 would result in a winning endgame for Black. Took a while to find ...g4! freeing up the e4 square for Black's King but once you do this puzzle falls into place. Very nice: 29...Rxc4 30. Nxc4 Bxc4 with a deadly discovered check looming forcing Ke1. Rook moves will all fail; (31. Rb1? d2+ 32. Kg2 Be2 for instance is too much for White to handle) 31. Ke1 Bxb3 32. axb3 Ke5 33. f3 g4 34. hxg4 fxg4 35. f4+ Ke4 36. Kd2 a5 (fastest way to create Zugzwang). |
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Nov-12-20
 | | Jimfromprovidence: For black's move 34 it might be tempting to conclude that just about any pawn move by black will win. For those of us who need endgame practice like me, you can figure out as an example if 34...f4, below, wins or not. 
click for larger view |
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Nov-12-20
 | | agb2002: Black has a bishop for a knight.
White threatens Rxd3.
The bishop x-rays the white king. This suggests 29... Rxc4: A) 30.Nxc4 Bxc4
A.1) 31.Rb1 d2+ 32.Kg1(2) Be2 wins a piece.
A.2) 31.Ke1 Bxb3 32.axb3 Ke5
A.2.a) 33.f3 f4 34.gxf4 (34.Kf2 fxg3+ wins) 34... gxf4 35.exf4+ (35.e4 Kd4 and the a- and d-pawns win) 35... Kxf4 and White can't control Black's a- and h-pawns at the same time. A.2.b) 33.Kd2 Ke4
A.2.b.i) 34.f3+ Kxf3 wins White's g- and h-pawns. A.2.b.ii) 34.Kc3 h5 (34... Kf3 35.Kxd3 Kxf2 36.g4) 35.Kd2 h4 36.g4 (36.gxh4 gxh4 followed by Kf3-g2, etc.) 36... f4 37.exf4 Kxf4 38.Kxd3 Kf3 wins. B) 30.Rxd3 Rc1+ 31.Ke2 Rc3 wins.
C) 30.Ke1 Rc1#. |
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Nov-12-20
 | | whittaker: <Jimfromprovidence> I'm thinking White can draw here with 35. exf4+ gxf4 36. g4, followed by h4, g5, and/or Kxd3 and stopping Black Q-side pawns. |
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Nov-12-20
| | ajk68: 29. c4?? was not thought out properly. |
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Nov-12-20
| | HeMateMe: well done <TheaN>, good notes. |
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Nov-12-20
 | | eternaloptimist: I played every move that Aleksandrov played except for the last move (34...♙g4!!), which is an excellent move btw. I chose 34...♔d5 |
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Nov-12-20
| | Jimfromprovidence: <whittaker> <I'm thinking White can draw here with 35. exf4+ gxf4 36. g4> You are correct. Here is the position below.
click for larger viewNow it appears that black has to play precisely to get a draw. |
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Nov-12-20
| | HeMateMe: after 36...b5 white will never have enough time to capture the black pawn on f4. The white king will be 'out of the square', as black can play a4 anytime he wants and create an unstoppable passer on the a file. black will have enough time to wait out and capture a white passed pawn on the g file. the moment white plays K-e4 to capture black's f pawn, ...a4 is played and the white king has to retreat to cover the a file. Black can leisurely swing his king around the other side, via f6-g5-h4 and finish off white's pawns. |
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Kibitzing
sac: 29...Rxc4