|
< Earlier Kibitzing · PAGE 3 OF 3 ·
Later Kibitzing> |
| Jun-18-10 | | tarek1: < David2009>
<32...Qf8 seems to have been a mistake, CraftyEGT finds 32...Qd7 and now what?>Thanks. This is exactly the move that bugged me when examining the follow-up of <32.Ng5> and this is why I adopted <32.Qg5> instead. |
|
| Jun-18-10 | | tarek1: For example after <32...Qd7> <agb2002> gives <33.Qf4 Be6> but Be6 is awfully passive, I was concerned by <33...Nd4> which is perhaps better.
All in all this "puzzle" doesn't look as clean and clear-cut as is usually the case, I would rather put it in the category of (good) "positional sacrifice". |
|
Jun-18-10
 | | chrisowen: White squashed black like a gadfly g6 hxg6 rxd8 rxd8 ng5 great in the air annoying horse posing the question why Bxc4?. With national pride racing in the blood Lubomir is well oiled machine. Down the wing ease clips knight in heal the rift Qe4 sets up the corner mate. It loses track back in 30..hxg6 goes bottoms up flanking offside Qg8 was preferred. White's smokescreen down the hfile good corridor definately supplied in Bednarski pass out. |
|
| Jun-18-10 | | Patriot: <<David2009>: 32...Qf8 seems to have been a mistake, CraftyEGT finds 32...Qd7 and now what?> This is why I said I couldn't be sure the line was best. There are too many things to consider and white has already invested the exchange. I played against Crafty and couldn't come up with anything solid against 32...Qd7. What does the computer say? |
|
| Jun-18-10 | | Stuckman: 32...Qd7 crafty played this against me.
33.Re4 Nd2
34.Rh4+ Kg8
35.Qxc5 Rb5
36.Qe3 Nb1
37.Rxc4 Nxc3
38.Rxc3 Qf5
White has a B+N and a pawn for a R, but the game is still unclear. There are probably better ways for white to play, this is just what I came up with. |
|
| Jun-18-10 | | CHESSTTCAMPS: After 30.g6 hxg6, I came up with 31.Rxb6 Bxb6 32.Qg3, producing the following position:
click for larger viewI thought this was winning, but there is a viable defense for black that I found with an engine after submitting my first post. Perhaps someone would like to try this without an engine, a good test for practicing defensive skills. |
|
| Jun-18-10 | | Patriot: <<CHESSTTCAMPS> I thought this was winning, but there is a viable defense for black that I found with an engine after submitting my first post. Perhaps someone would like to try this without an engine, a good test for practicing defensive skills.> I'm going to guess 32...g5. On 33.Nxg5 Qh5. On 33.Qxg5 Bd8. |
|
| Jun-18-10 | | Ferro: REINA VS HORSE! |
|
Jun-18-10
 | | Once: <patzer2> I fear that Goldmember is probably the weakest of the three Austin Powers films. One to be watched to complete the set, but probably not one to cherish. Instead, might I direct your attention to the utterly cheesy and wonderful delights of Our Man Flint and In Like Flint? |
|
Jun-18-10
 | | keypusher: <Once: <patzer2> I fear that Goldmember is probably the weakest of the three Austin Powers films. > That's like trying to figure out which of the Three Stooges was the stupidest. |
|
| Jun-18-10 | | Marmot PFL: 30 g6 is an attractive move to break up black's pawn defences and free g5 for the knight. after 30...hg6 31 Rxd8 Rxd8 32 Ng5 black's queen must guard g7, nor can it leave the back row undefended. from there the end comes quickly |
|
| Jun-18-10 | | MiCrooks: g6 seems like an obvious clearance, but how to follow up best is not totally clear. I like others didn't really consider Qg8. After Rxb6 Bxb6 the win is pretty easy and White has a number of paths. The Rook lift Re4 seems the most direct, but even Ng5 eventually gets the point, though the one line I saw here (Rc8/b8) is not likely to be played. Rather h6 not leaving the pawn on h7 as a target. Problem for Black is the Rook life STILL works here. I saw some analysis with g6 hxg6 Rxb6 Bxb6 Ng5 forgetting that Black now still has Qxf2+ where the chances seem equal. Black will play the Knight to block the dangerous White Bishop and it is anybodies game. |
|
| Jun-18-10 | | cjgone: Got g6, failed everything else, lol. |
|
| Jun-18-10 | | CHESSTTCAMPS: <Patriot> <I'm going to guess 32...g5. On 33.Nxg5 Qh5. On 33.Qxg5 Bd8.> A good try (that I didn't see), but I believe that 33.Ne5 wins in that line, e.g. 33... Qe6 34.Qxg5, with the triple threat of 35.Ng6+,
35.Qh4+, and 35.Nxc4 Qxc4 36.Qh5+ Kg8 37.Bd5+.
I'll post later this evening to allow others to take a crack at it before the puzzle expires. |
|
| Jun-18-10 | | David2009: <CHESSTTCAMPS: After 30.g6 hxg6, I came up with 31.Rxb6 Bxb6 32.Qg3, producing 
click for larger view
I thought this was winning, but there is a viable defense for black that I found with an engine after submitting my first post. Perhaps someone would like to try this without an engine, a good test for practicing defensive skills.> CraftyEGT defends with 32...Kg8 - was this the defence your engine found? Playing the line out as White against Crafty using the link given earlier (http://www.chessvideos.tv/endgame-t... in Kavalek vs J B Bednarski, 1972) and using <Patzer2>'s attacking idea Bf1!! I found
32.Qg3 Kg8 33.Ng5 Qd7 34.Bf1! Be6 35.Nxe6 Rxe6 36.Bc4 Nd4 37.Bxd4 Qxd4 38.Bxe6+ Kh7 39.Qg4 Kh6 (the threat was 40. Re4) reaching 
click for larger view which ought to win easily but against Crafty there's many a slip between cup and lip.
I finally won on my third attempt, but was Black's early play really best? |
|
| Jun-18-10 | | johnlspouge: Friday (Difficult)
Kavalek vs J B Bednarski, 1972 (30.?) White to play and win.
Material: Even. The Black Kh8 has 1 legal move, g8. White has a battery on the e-file, Re1 and Qe5, and another battery, Bc3 and Qe5, on the a1-h8 diagonal, pinning Pg7 to Kh8. The White Nf3 and Bg2 require activation. The Black Rb6 attacks Rd6. The White Kg8 is secured from check, although Black has a battery, Rf8 and Qf7, pointing at Pf2 behind Nf3. Candidates (30.): Qxg7+, Rxb6, g6
30.g6 (threatening 31.gxf7 or 31.Qh5 h6 32.Qxh6+ and # soon) 30…hxg6 31.Rxd8 Rxd8 [else, drop B for P]
The exchange sacrifice frees Nf3 from defensive duties. 32.Ng5 (threatening 33.Nxf7+, 33.Qxg2#, or 33.Qg3 34.Qh4+ and # soon) 32…Q along 7-th rank [or Qf6] 33.Qg3 Rd4 34.Bxd4 wins |
|
| Jun-18-10 | | jheiner: Kavalek vs J B Bednarski. Friday Difficulty "Difficult".
30. White to play
Material up a P. White has batteries on the e-file R+Q and long dark diagonal B+Q. The Pg7 is pinned. Black's K has one square g8 and is subject to back rank mate threats. The Black Q has the absolute responsibility to prevent mate on g7. White controls the two open central d and e files. Black's Nb3 and Bc4 are badly placed. Positional superiority and slight advantage suggest a mating attack. One last tactical note, the Black Bc4 supports the Q and light f7 g8 squares around the K. Bc4 is loose and cannot be defended. Removing this piece might weaken the white squares around the Black King for a coup de grace. The Black Q and Bc4 are both on light squares and candidates for a N fork from e5. Candidates: Re4, Rxb6, Rxd8, Rh6 Qxg7+, g6
At this point, I went briefly through every candidate move. I will spare you. There were a lot of interesting chances, and this took a lot of time. Even though I didn't follow every line, just a few moves in, there's no way I would have finished OTB. That said, I did suspect g6 as the best move, but I tried to be disciplined about the analysis. 30.g6 (clearing g5 for the N and attacking the Q)
30...Qxg6 31.Rxg6 Rxg6  (Q for R+P)
30...Bf6 31.gxf7 Bxe5 32.Rxb6 Bxc3? 33.Re8!
30...Qe7 31.Qxe7 Bxe7 32.Rxb6
30...hxg6 main variation
30.g6 hxg6 (forced as above)
31.Rxd8 (most direct) Rxd8
32.Ng5 Q must move but continue to protect g7 from mate
33...Qd7 (for example)
And at this point I couldn't put it together. I had tried a ton of variations, especially looking for back rank mate possibilities, even lots of N forks on f7 (which fail to the LSB of course). So I gave in and checked the solution. Sadly, during my analysis I kept seeing the LSBc4 as the problem because it could drop to g8 and spoil back rank mate possibilities. This caused me instead to focus on dark square attacks and strange sacs, but I forgot my tactical note to self at the top! After going through so many variations where that was not relevant, I honestly just forgot. Very frustrating. I am trying to organize my analysis these days by taking candidates from left to right, top to bottom. It's easier for me to keep track of what I have and have not mentally calculated. In this case, the g6 move just happened to be last. Perhaps I should have had the mental flexibility to go right to left when that was the best looking move to me from the start. Sigh. In retrospect, g6 was the move I would have picked OTB, but I could not visualize the attack all the way. On the good side, I think this would have been fairly straightforward had I been able to move the pieces and I refused to let myself do that. Tough one as I got so very close. |
|
| Jun-18-10 | | jheiner: <johnsplouge wrote: 32…Q along 7-th rank [or Qf6] 33.Qg3 Rd4 34.Bxd4 wins> Instead of 33...Rd4, I believe 33...Kg8 is better for Black. It saves the Bc4 as there's an extra tempo in the game that could've been dangerous. 32...Qd7 33.Qg3 Kg8 34.Qh4 Bd5 saves the Bc4 but...
35.Qh7+ Kf8 36.Qh8+ Bg8 gets very ugly for Black after 37.Ne6+ However very similiar line 35.Bxd5+? Qxd5 36.Qh4+ Kg8 37.Qh7+ Kf8 38.Qh8+ Qg8 39.Ne6+ Rxe6 40.Qxg8 Kxg8 41.Rxe6 leaves them equal The position after Bc4 is pretty easy to play, but it's not mate. Just a decisive fork and material loss. And good fireworks too...! |
|
| Jun-18-10 | | TheBish: 
click for larger viewWhite to play (30.?) "Difficult", White is up a pawn. My first hunch turned out to be correct, but it took quite awhile to see all the ideas. 30. g6!
This key move opens lines for White, including the g5 square for the knight and the h4-d8 diagonal for the queen in certain lines. Black can either accept the pawn or decline it. A) 30...hxg6 31. Rxd8! Rxd8 32. Qg5! Rf8 (or 32...Rd5 33. Qh6+! Kg8 34. Re8+ Qxe8 35. Qxg7#) 33. Qh4+ Kg8 34. Re7 (or 34. Ng5) g5 35. Nxg5 (or 35. Rxf7) Qxf2+ 36. Qxf2 Rxf2 37. Rxg7+ is easy. B) 30...Qg8 31. Rxb6 Bxb6 32. Re4! Nd4 33. Nxd4 cxd4 34. Bxd4 Bd8 (stopping Rh4) 35. Bc5 Rf6 36. gxh7 Kxh7 37. Rh4+ Rh6 38. Qf5+ g6 (or 38...Kh8 39. Rxh6+ gxh6 40. Bd4+) 39. Qd7+ Qg7 40. Rxh6+ Kxh6 41. Qxd8 wins a piece. C) 30...Qc7 31. Rxd8! wins big due to all the threats, which are easy to work out. D) 30...Qb7 31. Rxb6! Bxb6 32. Ng5 wins with the dual threats of Bxb7 and Nf7+. E) 30...Qa7 31. Qe8! wins major material or mates, e.g. 31...Rg8 32. gxh7 Rxe8 33. Rxe8+ Kxh7 34. Ng5+! Bxg5 35. Be4+ g6 36. Rh8#. |
|
Jun-18-10
 | | patzer2: <David2009> After 32...Qd7 Crafty gets mated following 33. Qe4! Nd4 34. Qh4+ Kg8 35. Bf1! Be6 36. Bxd4 cxd4 37. Qh7+ Kf8 38. Qh8+ Ke7 39. Qxg7+ Kd6 40. Qe5+ Ke7 41. Bc4! Qc8 42. Nxe6! Qxc4 43. Nxd8+ Re6 44. Nxe6 Kd7 45. Nxd4 Kc8 46. Qe8+ Kc7 47. Re7+ Kb6 48. Qb8+ Kc5 49. Re5+ Kxd4 50. Qd6+ Qd5 51. Qxd5#. |
|
| Jun-19-10 | | CHESSTTCAMPS: <David2009:>
Thanks for your post. Sorry for my late response - just got back from Friday night table tennis. BTW, like Patzer2, I investigated your link and found the Bf1 idea. I reached what seemed to be a strong position against Crafty before I had to leave. Yes, for the problem that I presented, 32... Kg8 was what my engine found and it seems to me to be sufficient (e.g. 33.Ne5 is met by Bc7). In your response to my post <I found 32.Qg3 Kg8 33.Ng5 Qd7 34.Bf1! Be6 35.Nxe6 Rxe6 36.Bc4 Nd4 37.Bxd4 Qxd4 38.Bxe6+ Kh7 39.Qg4 Kh6 >, you are showing a different position from the one I diagrammed. Instead of the exchange sac on d8, I traded rooks on b6 before 32.Qg3. So after 32... Kg8 33.Ng5 is parried by 33... Qf4, leaving white with very litle advantage. So I have to conclude that Kavalek's line is a more serious winning attempt, but my line requires very accurate defense to hold for black. |
|
| Jun-19-10 | | CHESSTTCAMPS: ... and based on <patzer2's> last post, Kavalek's line should win even against best defense. |
|
| Jun-19-10 | | David2009: <CHESSTTCAMPS>: Sorry about misquoting your position earlier (in Kavalek vs J B Bednarski, 1972) and thanks for the other comments. <patzer2>: Thanks for providing the mating line against Crafty - your timing is very precise, e.g. finding 35. Bf1! and also the immediate 36. Bxd4! forcing 36...cxd4 since 36...Qxd4 loses at once (37. Qh7+ Kf8 38.Rxe6 1-0). I think this is an example where engines add value - the full resources and good defences are hard to spot unaided in this tactically rich position. |
|
| Jun-19-10 | | CHESSTTCAMPS: <David2009> <I think this is an example where engines add value - the full resources and good defences are hard to spot unaided in this tactically rich position.> Agreed, and I really appreciate your links to http://www.chessvideos.tv/ that help kibitzers explore key positions. In my incomplete game against Crafty, I believe I missed the key move 36.Bxd4 found by <patzer2>. |
|
| Feb-02-11 | | Gawk: I'm just starting to play the Classical Dutch with 7...a5, and I'm wondering if 9...Nb5 is playable. Black loses pretty soundly this game, and 9...Nxc3 seems like a sound alternative. |
|
 |
|
|
< Earlier Kibitzing · PAGE 3 OF 3 ·
Later Kibitzing> |
Kibitzing
sac: 31.Rxd8