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< Earlier Kibitzing · PAGE 4 OF 4 ·
Later Kibitzing> |
Mar-30-12
 | | kevin86: That was an easy one-the bishop sac took the pawn away from guarding the a-file. The only way to stop the pawn would be B at b1,but then the king can drive him away. |
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Mar-30-12
 | | agb2002: Black has a knight and a pawn for a bishop.
White threatens 35.Bxf7 and h4-h5-g4-g5-h6, etc.
Black can block the a2-g8 diagonal with 34... Nc4+:
A) 35.bxc4 c5
A.1) 36.Bh7 g6
A.1.a) 37.h4 a4 38.h5 a3
A.1.a.i) 39.hxg6 fxg6 40.Bxg6 a2 - +.
A.1.a.ii) 39.h6 a2 40.Bg8 a1=Q+ 41.Kf4 (41.Kd5(e4) Qa8+ and 42... Qxg8) 41... Qc1+ and 42... Qxh6 - +. A.1.b) 37.Ke4 Kb3 38.Kd3 (38.h4 is similar to A.1.a) 38... a4 39.Kd2 a3 40.Kc1 a2 - +. A.2) 39.Ke4 Kb3 is similar to A.1.b.
B) 35.Kd4 Nd6
B.1) 36.h4 Kxb3 37.h5 a4 38.g4 a3 39.g5 a2 40.Kc5 (40.h6 gxh6 41.gxh6 Nf5+ and 42... Nxh6 - +) 40... a1=Q 41.h6 Qc3#. B.2) 36.Bh7 Kxb3 37.Kc5 a4 38.Bb1 a3 39.h4 Kb2 40.Kb4 c5+, etc. C) 35.Ke4 Kxb3
C.1) 36.Bxf7 Kc3 37.Kf4 a4 38.Bb1 Kb2 - +.
C.2) 36.Kd4 Nd6 is similar to B.
D) 35.Kf5 Nd6+ and 36... Kxb3 - +.
E) 35.Kf4 Kxb3 is similar to C. |
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Mar-30-12
 | | James D Flynn: My first thought was 34……c5 intending 35.Bxf7 c4 36.bxc4 c5 to block the f7 to a2 diagonal.. That probably wins but there will still be a fairly tight pawn race. It isn’t entirely clear that Kxb3 isn’t a winning line but then it will not be possible to block the diagonal and the result will depend upon a pawn race e.g 35.Bxf7+ Kb2 36.Kf5 c5 37.Kg6 c4 38.Kxg7 c3 39.Bg6 c2 40.Bxc2 Nxc2 41.f4 a4 42.f5 a3 and White’s pawn will queen one move after Black’s with a likely draw.
I then realized I could Block that diagonal a move sooner by 34.Nc4 35.b3xc4 ( forced by the threat of Nd6 keeping the B trapped until the White pawns can come to its rescue)c5 36.Bxf7 a4 37.Bg6 a3 38.Bb1 Kb3 39.Kf4 Kb2 40.Kg3 Kxb1 41.Kxg7 a2 42.f4 a1(Q)+ and White’s pawn advance will be much too late. |
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| Mar-30-12 | | 5hrsolver: Great puzzle. 34...Nc4+. If white does not capture the knight then Nd6 next move protecting the f7 pawn and black is free to capture the b6 pawn. If 36.Bh7 then g6 blocks the bishop.
The third option is the game continuation where white is just a move short of having his king on b4 and bishop on b1 when black cannot capture the bishop without giving up his a pawn. |
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Mar-30-12
 | | sevenseaman: Having given <Once>'s Fritzy line a serious once over, I think it is technically quite a sound way of winning. |
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| Mar-30-12 | | Rook e2: I saw it but I thought it woulnd work because the bishop was there on time.. Ofcourse I now see the King can get rid of that problem.. no points for me. |
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Mar-30-12
 | | WinKing: <SuperPatzer77:<David009> Take a look at my analysis - instead of 36...g6 - 36...Kb3!! (Fritz 5.0's idea).> If 36...Kb3 then 37.Bb1 & it's not so simple.
36...Kb3 37.Bb1 Kb2 38.Kd5 Kxb1 39.Kxc5 c6 40.Kxc6
click for larger view |
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| Mar-30-12 | | dragon player: Endgame puzzle today. Black is a pawn up, but he has a
knight against a bishop and his pawnstructure is ruined.
I think I see the keymove:
34...Nc4+!
35.bxc4 c5!
Or else 36.c5
36.Bxf7
If 36.Bh7 g6, if 36.Ke4 a4 37.Kd3 Kb3 etc.
36...Kb3
37.Bg6 Kb2
and the pawn cannot be stopped anymore.
But what if just
35.Ke4?
I think this works:
35...Nd6!
36.Bh7 g6!
and the bishop is trapped, black wins the b3 pawn and
promotes the a-pawn.
Time to check.
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Slighty other varation, but right.
5/5 |
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Mar-30-12
 | | David2009: R Garcia vs J A Rubinetti, 1972 postscript: Thanks to <WinKing>,<SuperPatzer77> and <Gypsy> for their interest in
the alternative defence found by Crafty EGT in the colours-reversed position. <Gypsy>'s suggestion beats the EGT because it keeps the f and g pawns but
then runs into a zugzwang. I drew first time round by posting my Q on h8 to blockade the Pawns then infiltrating my King round the back. This allowed the EGT to keep the h and g Pawns giving the defence more elbow room: if there was a zugzwang I didn't find it. |
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| Mar-30-12 | | mikmik777: March 30, 2012
Black to play: 34. ...?
R Garcia vs J A Rubinetti
"Difficult"
In this endgame position where there are pawn islands found on both sides of the board, bishops are generally preferable than knights. However, on this occasion Black has a very interesting position. White's bishop is currently out of play being blocked by a barricade of pawns at square g8. Although Black's knight is at the edge of the board, it suddenly springs into action. 34. ...Nc4+! [This move tries to remove White's pawn from the b-file. Black can make a passed pawn on the a-file if White captures the knight. 35.bxc4 c5! 36.Bh7 a4 37.Bb1 Kb3 and Black's a-pawn is unstoppable] 35.Kd4 Nd2
[35. ...Kxb3? is a blunder because of 36.Bxf7 pinning the knight] 36.Bxf7 Nxb3+
37.Kd3[or 37.Ke3!? leaving the b1-h7 diagonal open for the bishop]
37. ...c5
38.Kc2 c4![securing the knight from the bishop]
39.Kb2 a4
40.Ka2 c3
41.Bg6 a3
Now we have three variations:
42.Bf7 c2 [Black promotes his pawn on c1 next move]
42.Bc2 Nc1+ 43.Kb1 a2+ 44.Ka1 Ka3 
42.Bb1 Nc1+ 43.Ka1 Kb3
Time to check...
I think, I found all the important variations. |
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Mar-30-12
 | | chrisowen: Cain sugar field why again c4 first i pull at steam in trouble white has inched his king e5 mista bishp grateful crum a chaca in one f7 lewd cost a grind for black is it ar in good cap you chin up bxc4 once bus in tell c5 ogle free path for a4 i call it red in 36.bxf7 account in strong a3 vent you Raimundo in g6 boot his bean motor 38.bb1 yet it shrine grow large you gene pool JAR re magic flute 40.ba2 el zoom a try in coloured crazy horse in c4 0l nope rated in beasting o it ti cracking juice 32.a4? to be frank black bless lucky it strike gold pc5 nf6 pc6 rock it no need in sweeping off it wooden beams it place pin a4 cheg win c4 jack nigh time like nb5 quasimodo dragon wrecking aid fry any darn deaf raid back ato rat card in a3 empress it's hole in kxa2 fill in pat sock it grub in c5 midi gen feld lay in be da 5a2 a class is how in ergo rugged opus magnum. |
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Mar-30-12
 | | SuperPatzer77: <WinKing: SuperPatzer77:<David009> Take a look at my analysis - instead of 36...g6 - 36...Kb3!! (Fritz 5.0's idea). If 36...Kb3 then 37.Bb1 & it's not so simple.
36...Kb3 37.Bb1 Kb2 38.Kd5 Kxb1 39.Kxc5 c6 40.Kxc6 > <WinKing> Black's 39th move is 39...c6?? - a blunder Take a look at the diagram - White to play below:
click for larger view38. Kd5 Kxb1, 39. Kxc5 Kb2! (much stronger than 39...c6?? and catching the white c-pawn), 40. Kb5 Kb3 (threatening 41...a4), 41. Kxa5 Kxc4 - Black is winning . <WinKing> You made a blunder - 39...c6?? - Correct move is 39...Kb2! and then 40...Kb3 threatening 41...a4 so, that's why the Black King has to catch the White c-pawn. SuperPatzer77 |
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| Mar-30-12 | | Marmot PFL: Like several people I found this fairly easily, mainly because there aren't so many options. A passed a-pawn is black's best chance but it white plays Bxf7 and defends b3 that will be difficult. 34...Nc4+ and Nd6 stops this and if 35 bc4 c5! blocks the white c pawn and thus the bishop (move order important, can't let white play c5). Here the rook pawn is very strong (unlike many endings), as it's far from the white king and the WB has only 2 squares, b1 and a2. |
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Mar-30-12
| | WinKing: < <WinKing> You made a blunder - 39...c6?? - Correct move is 39...Kb2! and then 40...Kb3 threatening 41...a4 so, that's why the Black King has to catch the White c-pawn.> Still 37.Bb1 is better than 37.Kd5? which allows the bishop to be imprisoned as in your original line. The black 'a' pawn can not march freely to the queening square with Bb1. True though that 39...Kb2 is better than 39...c6 & black wins in all lines regardless. I'm still not convinced, however, that 36...Kb3 is 'much better than 36...g6' which you claim. |
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Mar-30-12
 | | Gypsy: <David2009: ... <Gypsy>'s suggestion beats the EGT because it keeps the f and g pawns but then runs into a zugzwang. ... > I finally had a bit of time to look at the endgame. My winning line corresponds to your description. (Starting from your 34...Nc4+ 35.bxc4 c5 36.Bh7 g6 37.f4 a4 38.Kf6 a3 39.Bg8 a2 40.Bxf7 a1=Q+ 41.Kxg6...) Maneuvers (which can be interleaved as position demands) (1) Qa1-g1xh2-h8
and
(2) Kb4-c3-d4-e5-d6-e7-f8
establish a blockade of White pawns. Then the win is still tedious but only a matter of time: White K and B are pushed out (utilizing zugzwangs) so that one of White pawns drops. And Black continues like that till White decides to give up the ghost. |
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Mar-30-12
| | SuperPatzer77: <WinKing: ...I'm still not convinced, however, that 36...Kb3 is 'much better than 36...g6' which you claim.> <WinKing> 36...g6?!, 37. Kf6! (attacking the king-side Black pawns and White has 3 connected pawns and a bishop so, Black has a big difficulty wtih this situation. 36...Kb3!! is the best move because the White King isn't able to attack the king-side Black pawns and then the White King tries to attack the double Black c-pawns. SuperPatzer77 |
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Mar-30-12
| | Gypsy: <SuperPatzer77> I too first thought that 36.Bh7 <Kb3> (or 36...Kb3) was an improvement over 36...g6; but I changed my mind after looking at this counterattacking variation: <36.Bh7 Kb3> 37.Bb1 Kb2 38.Kd5 a4 39.Kxc5 a3 40.Kb3... 
click for larger viewBlack does not have time to take the B if he desires to also preserve his a-pawn. And I have not seen how to improve things for Black, nor how to gain a tempo by interchanging the order of moves. |
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Mar-30-12
| | SuperPatzer77: <Gypsy: <SuperPatzer77> I too first thought that 36.Bh7 <Kb3> (or 36...Kb3) was an improvement over 36...g6; but I changed my mind after looking at this counterattacking variation: <36.Bh7 Kb3> 37.Bb1 Kb2 38.Kd5 a4 39.Kxc5 a3 40.Kb3...> <Gypsy> Black's 38th move is a4 - a bad move. Correct and simple move is 38...Kxb1! Black wins! 38...Kxb1! (not 38...a4??  ), 39. Kxc5 Kb2, 40. Kb5 Kb3 (threatening 41...a4), 41. Kxa5 (forced) Kxc4 SuperPatzer77 |
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Mar-30-12
 | | twinlark: Easy to figure it out if Black accepts the knight sac, but takes a bit of calculation to see what happens if he declines. |
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Mar-30-12
 | | M.Hassan: "Difficult" Black to play 34...?
Black is a pawn down.
34.........Kxb3
35.Bxf7+ Kc3
36.Kf5 Nc4
37.Kg5 a4
38.Kg6 a3
39.Kxg7 a2
40.f4 a1=Q
41.f5 Kd2+
42.f6
No need to continue details. Black has made a Queen and can win. If I'm right, today's puzzle was not difficult. Now is the time to check.
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The text appears riskier than my line |
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Mar-30-12
| | Gypsy: <SuperPatzer77> I stand corrected: here, the a5-a4 is a mistake and the Kxb1-b2-b3 is a fine improvement. |
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| Mar-30-12 | | 1stboard: Ending with pawns are the simplest to win. Note the dominating position of blacks king with a passed pawn ..... |
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Mar-30-12
| | SuperPatzer77: <Gypsy: <SuperPatzer77> I stand corrected: here, the a5-a4 is a mistake and the Kxb1-b2-b3 is a fine improvement.> <Gypsy> We've learned a nice lesson from this game. I gotta tell you the truth that I learned these moves from Fritz 5.0. <Gypsy> I'm not a chess expert, you know that? We're just humans, that's all. We've enjoyed kibitzing. By the way, the word "gypsy" is an offensive word to the East Europeans. We Americans don't know about that. Don't worry about your username, OK? I won't say "gypsy" to any Eastern Europeans as of now. I admitted that I said that word to any lovely European woman. She got ticked off at me. Ooh, shoot!! I've learned a new lesson from her. Have a nice weekend, <Gypsy> SuperPatzer77 |
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| Mar-30-12 | | LivBlockade: 34...Nc4+ is the most elegant way to win and as <Once> showed, 34...Kxb3 wins also. I think 34...c5 wins pretty easily also. The main line would be 34...c5; 35. Bxf7 c4; 36. bxc4 Nxc4+; 37. Kd4 c5+; 38. Kd3 Ne5+; 39. Kc2 Nxf7 wins. Does White have any serious alternative in this line? |
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Mar-31-12
| | sevenseaman: < LivBlockade><34...Nc4+ is the most elegant way to win and as <Once> showed, 34...Kxb3 wins also. I think 34...c5 wins pretty easily also. The main line would be 34...c5; 35. Bxf7 c4; 36. bxc4 Nxc4+; 37. Kd4 c5+; 38. Kd3 Ne5+; 39. Kc2 Nxf7 wins> . This is a new one and a nice one too.
<Does White have any serious alternative in this line?> With so many lines finding a Black win I do not fancy any chances of survival for White. |
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Later Kibitzing> |
sac: 34...Nc4+