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< Earlier Kibitzing · PAGE 3 OF 3 ·
Later Kibitzing> |
May-08-10
 | | NM JRousselle: This was an excellent Saturday puzzle. |
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May-08-10
 | | kevin86: All roads don't lead to Rome-in this case,they lead to g2 |
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May-08-10
 | | lost in space: I saw the idea but was not able to calculate all the lines. In any case: BEAUTIFUL |
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| May-08-10 | | Eduardo Leon: Analysis by Eduardo León v22, Chicken Edition.
<20... xg2+! 21. h1> Not 21.xg2? dxc4+ 22.f3  g6+.
<21...xh2+! 22.xh2> Not 22.g1?? xf2#.
<22...xf2+ 23.h1> Not 23.h3? dxc4 24.g3??  c8+ 25.h4 e7+.
<23...dxc4+ 24.xb7+ xb7> White can't give any useful check.
<25. xc4 f3+>
Before brining his remaining pieces, black has to ensure white cannot counterattack (xa6+). <26.h2>
Not 26.g1?? c5+ 27.h2 h5+ 28.g2 g8+ 29.f1 f3+ 30.e1 f2+ 31.d1 g1#. <26...h5+ 27.g2> Not 27.g1?? c5+ 28.f1 f3+ 29.e1 f2#.
Not 27.g3?? d3+ 28.g2 g4+ 29.f2 f4+ 30.e2 e4+ 31.f2 f3+ 32.g2 g4+ 33.h2 h3#. <27...g6+>
Now that a6 is defended, black can bring his remaining pieces to the game. |
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May-08-10
 | | Jimfromprovidence: I got the same concept as <tacticalmonster>, to use a queen sacrifice to create a mating threat. After 20 Rxg2+ 21 Kh1 Qxb3!? 22 Bxb3 d4, black has a forced mate threat that must be answered right away by white. 
click for larger viewI saw 23 f3 Bxf3 24 Rf1 Be4 25 Bd1 Rg3+ 26 Bf3 Rxf3 as winning material for black. 
click for larger view |
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May-08-10
 | | dzechiel: Black to move (20...?). Black is up a pawn. "Very Difficult." No time to work on this last night (and only a little time this morning). But it's pretty obvious that black is threatened, as all the white pieces have been brought to bear on the black king. This is one of those cases where "The best defence is a good offense" comes into play. After 20...Rxg2+
white cannot capture with 21 Kxg2 because of 21...dxc4+ 22 Rf3 Bxf3+ 23 Kxf3 Rd3+ and black has completely diffused white's initiative and picked up another pawn in the process. No, the white must play 21 Kh1
Of course not 21 Kf1 Qxf2#.
21...Rxh2+ 22 Kxh2 Qxf2+ 23 Kh3
Another possibility is 23 Kh1 dxc4+ 24 Rxb7+ Kxb7 and play looks to be up in the air. 23 dxc4
This is all I have time for. I think black can make headway once he gets his bishop into the game and opens lines for his rook. Time for me to check. |
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| May-08-10 | | VincentL: "Very difficult".
White has massed his heavy pieces on the Queen side for an attack which has not fully materialised, and neglected K side defending almost completely. The first thing I notice is that black wins a bishop after 20..... Rxg2+ 21. Kxg2 dxc4+
and 22... cxd3 (if white declines the rook with Kh1 , 21.....Qxf2 leads to mate I think). This would presumably win the game - but is there something faster? I haven't got much time today, so will leave it at this and check the game line and other
kibitzers' comments. |
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| May-08-10 | | prensdepens: "Very Difficult".
Hmmmm. hmmmm. hmmmm.
This is not for patzer like me. Gotta go and grab a bite. |
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| May-08-10 | | rapidcitychess: Saturday
Very diffucult
20...Rxg2+!
A 21.Kxg2 (The only test.) 21...dxc4+ followed by Qxb3 with a easy matter of winning. B 21.Kf1 Qxf2 mate.
C 21.Kh1 dxc4! threatening mate easily winning. This must be correct.Time to check |
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| May-08-10 | | rapidcitychess: <newzlid> I know, it takes me like 30 seconds to get all the lines, and the move. |
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| May-08-10 | | cjgone: Got it right, but couldn't calculate the 2nd half of the game :[ |
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May-08-10
 | | tarek1: <Jimfromprovidence> very interesting concept. But what did you see after other defenses than 23.f3 ? for example 23.h4 or 23.Bd1 (with the idea f3), both of which seem to answer the mate threat ? Also on the second diagram, it seems to me that Black probably is better but still is a long way from winning. |
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May-08-10
 | | chrisowen: Look go drag and or lie rook hint all 20..Rxg2. Luck as would have it gather not the special 22..Qfx2 sets up 27..Qg6+ with the forced Qc6+ screened out directly. White wants the phantom menace called off but Bc5 then R2d2+ pilots the attack. Kh3 Qg2+ has in addition emergency rescueing light's king but no avail, the queen me pad up once episode of bishop check sees action. |
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| May-08-10 | | JeanGiskan: wasn t 21 dc4 much easier than Rh2: |
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| May-08-10 | | JeanGiskan: sorry for my stupid comment |
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| May-08-10 | | butilikefur: ok.. i tried 20...Qxf2+ 21. Kxf2 Bc5+ 22. Ke2 Rxg2+ 23. Kd3 e4+ 24. Kc3 d4+ mate. of course 22. Kf1 and the lines aren't so explosive, for black, but it shows what fun this position is.. 20...Rxg2+ 21. Kh1> 21. Kxg2 dxc4+ 22. Rf3 Bxf3+ 23. Kxf3 Qb7+ and 24. Ke3 Bc5+ wins, 24. Ke2 Qe4+ wins the rook, 24. Kg3 Rd3+ 25. Kg4 Qc8+ 26. Kh4 Be7+ 27. Kh5 Qh3+ mate, 24. Kg4 Qg2+ <21...Rxh2+> 21...Qxf2 might also work since 22. Rxb7+ Kxb7 23. Qxa6+ Kb8 (23...Kc7 24. Nb5+ Kd7 25. Qa7+ White wins) and White cannot get through.. all other variations don't seem to help White since h4 and h6 are guarded <22. Kxh2 Qxf2+ 23. Kh1> 23. Kh3 falls upon the same plan <23...dxc4+ 24. Rxb7+ Kxb7 25. Nxc4> 25. Qxc4 Qf3+ and 26...Bc5 should win <25...Qh4+ 26. Kg2 Qe4+ > ... ok this line only draws.. i forgot Qxa6 is check. best is 21...Qxf2 |
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| May-08-10 | | butilikefur: hahha he won it with 25...Qf3+ |
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May-08-10
| | Jimfromprovidence: <tarek1> <very interesting concept. But what did you see after other defenses than 23.f3 ? for example 23.h4 or 23.Bd1 (with the idea f3), both of which seem to answer the mate threat ? > These both lose to 23…Bc5!, threatening 24…Rxf2+ as well as 24…Rdg8 (and later …d3). The below diagram is after 23 Bd1 Bc5.
click for larger view <Also on the second diagram, it seems to me that Black probably is better but still is a long way from winning.> It’s worse for white than it looks. After 20 Rxg2+ 21 Kh1 Qxb3!? 22 Bxb3 d4, 23 f3 Bxf3 24 Rf1 Be4 25 Bd1 Rg3+ 26 Bf3 Rxf3, the position again is below.
click for larger viewWhite has two moves, 27 Rxf3 or Kg1.
27 Rxf3 loses to 27…Bxf3+ 28 Kg1 d3.
click for larger view
Black has an escorted passed pawn that will cost white a piece to stop. 27 Kg1 loses to 27…Bc5 in the manner previously discussed. One way is after 28 Rxf3 d3+ 20 Kf1 Bxf3.
click for larger viewBlack again has an escorted passed pawn that wins a piece. |
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May-08-10
| | chrisowen: O nice cherry pick <Once>, risen to the occassion. Not cross pensive very, it shine like a sonnet. Dont give us the cold shoulder and dessert now. Golden opulence, what's in store for Sunday? |
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May-08-10
| | tarek1: <Jimfromprovidence> thanks for the explanations, you found a valid alternative solution :) |
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| May-08-10 | | wals: I went for - 20...Rxg2+ Kxg2 21.dxc4
Kf1 blunder, -14.04, as was Kg1 -20.78.
Rybka tracked the text moves from 20 to move 30, with Black up 3 pawns and a bishop for a knight. 30.Ra3.(-#4) Rd2+ 31.Kh3 Qg2+ 32.Kh4
Be7+ 33.Kh5 Qg5#. |
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| May-08-10 | | zooter: Ok, I think I got this one
Material is even (almost, black is up a pawn) and there seems to be a good attack going on for both sides, but black strikes first 20...Rxg2+ and now there are 2 main options:
a) 21.Kxg2 dxc5+ 22.K-moves cxb3 wins a piece
b) 21.Kh1 (more stubborn) Rxh2+ (forcing a capture as declining leads to 22...Qxf2+ with a terrible position) 22.Kxh2 Qxf2+ 23.Kh3 (23.Kg1 leads to 23...dxc5+ 24.Rxb7 loses the exchange and 2 pawns) and now I'm unable to see the continuation, but probably 23...Qf5+ and so on pushing the king onto the white squares and playing dxc5+ or if white gets greedy get in more material and met Time to check what I've missed here |
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| May-08-10 | | zooter: Ok, I missed that after 23.Kh3 the simple dxc5 continues the threat of attacking and if the rook moves out of the b-file (it has nowhere to go, the bishop on c8 can join the attack by Bc8+; Qg2+ threat is there and so on |
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| May-09-10 | | TheBish: I Dragan vs P Lukacs, 1987 Black to play (20...?) "Very Difficult"
Black is up a pawn, but his queen is under attack and after it moves, White will have Bxa6, recover the pawn with an attack. But things aren't that simple! 20...Rxg2+!
After looking at the queen sac with 20...dxc4 21. Rxb6 Rxg2+ 22. Kf1 and seeing Black's doom, I found the only other option that made sense. Now: A) 21. Kxg2 (of course not 21. Kf1 Qxf2#) dxc4+ 22. Rf3 Qg6+ 23. Kf1 (or 23. Kh3 Bc8+ mates quickly) Bxf3 and the only thing delaying 24...Qg2+ and 25...Qg1# is a spite check from the white queen. B) 21. Kh1 (best try) Rxh2+!
But not 21...Qxf2? 22. Rxb7+ Kxb7 23. Bxa6+ Kc7 24. Qa5+ Kc6 25. Bb5+, etc., drawing. 22. Kxh2 Qxf2+ 23. Kh1 (or 23. Kh3 Bc8+) Qh4+ 24. Kg2 Or 24. Kf2 Bc5+ 25. Kg2 Rg8+, mating.
24...dxc4+ 25. Rxb7+
Forced, or White will get mated.
25...Kxb7 26. Nxc4 Qg5+ 27. Kf1
White doesn't want to allow the bishop to get into the game with check. 27...Qf5+ 28. Ke1 Qe4+ 29. Kf1 Qd3+ 30. Ke1 Kb8! (taking time out for defense) 31. Na5 Or 31. Qxa6 Bb4+ 32. Kf2 Bc5+ 33. Ke1 Qg3+ 34. Ke2 Qf2#. 31...Qe3+ 32. Kf1 Qf3+ 33. Ke1 Rd3! 34. Qe8+ Ka7 35. Nc6+ Kb6 36. Qb8+ Kxc6 37. Rxa6+ Kd5. 38. Qb7+ Kd4 39. Ra4+ Ke3 40. Qb6+ Rd4 41. Qb3+ Kf4 and Black's king escapes, with Black a piece and two pawns up. Of course, there are many variations for the finale, but the bottom line is that White is busted. On to the game! |
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May-09-10
 | | An Englishman: Good Evening: Great post, <Once>. |
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Later Kibitzing> |
sac: 21...Rxh2+