< Earlier Kibitzing · PAGE 2 OF 2 ·
|Jan-06-08|| ||MostlyAverageJoe: <think: One of the only times, perhaps the first time, the move Ng8 has evoked resignation.>|
For what it is worth, Hiarcs tells me that in the final position white has a forced mate in 10. For example:
31. Qxe7 Nxe7 32. Rxe7 Kg8 33. Re8+ Kf7 34. Rc8 Rxc8 35. axb4 Rc2 36. Ne4 Qc1 37. Nd6+ Kf8 38. Nc4 Rxc4 39. a3 Rc2 40. h4 Qb2#
Anything else but the Qxe7, and it is a mate in 8 or fewer moves.
|Jan-06-08|| ||TrueBlue: tired, but like Nxg4 here, hoping for queen deflection followed by Rxd3 eventually|
|Jan-06-08|| ||TrueBlue: No queen deflection? Rxd3 immediately :( And they call this insane !??!?!?|
|Jan-06-08|| ||whiteshark: A better continuation was <19.Nxf6+ Bxf6 20.Be4 Bxe4 21.Qxe4 >
click for larger view
|Jan-06-08|| ||Eggman: <<On your first line 23...Nxg4 white doesn't play primitive 24.Qxg4 but attacks on black king by moves like 24.Ng5!>>|
Yes, in such a tense position with opposite-sides castling the winning of a mere pawn just opens up lines towards your King and wastes a turn. 23...Nxg4 should not even come into consideration.
|Jan-06-08|| ||patzer2: For today's Sunday puzzle, Black's 23...Rxd3!! demolishes White's pawn structure and decisively weakens the Queenside castled position. |
Finding the initial move may not be insanely difficult, but the follow-up could be a bit of a challenge.
Here's a bit of analysis verified with Fritz 8:
<23...Rxd3!!> Decisively weakening White's Queenside castled position with a surprise demolition.
[24. cxd3 Qc2+ 25. Ka1 Qxd1+ ;
24. Nxf6+ Bxf6 25. Qxd3 (25. cxd3 Qc2+ 26. Ka1 Qxb2#) 25...Ba6 26. Qe4 Bxe2 27. Rc1 (27. Qxe2 Qxc2+ 28. Ka1 Qxb2#) 27... Bxb2! 28. Qxe6+ Kh8 29. Kxb2 Qc3+ 30. Kb1 b3 31. axb3 a3 ]
<24... Ba6! 25. Qxa6 Qxc2+ 26. Ka1 Qxd1+ 27. Nb1 Rc1! 28. Ned2>
(28. Qxe6+ Kh8 29. Ned2 a3 30. bxa3 Bc5 31.
Qc8+ Ng8 32. Qd7 bxa3 33. Qd3 Qc2 34. Qxc2 Bd4+ 35. Qc3 Bxc3#)
<28... a3! 29. Qxe6+ Kh8 30. bxa3 Ng8> 0-1
White resigns in the face of nothing but losing possibilities, such as 31. g5 (31. Qe5 Bf6 ; 31. axb4 Bf6+ ) 31... Bxg5 32. Rf2 Bxd2 33. Qe4 (33. Qe2 Rxb1#) 33... Bc3+ 34. Rb2 bxa3 35. Qc2 axb2+ 36. Qxb2 Rxb1#.
|Jan-06-08|| ||patzer2: According to http://en.wikipedia.org/wiki/Leonid... and http://www.fide.com/ratings/card.ph..., Yudasin is a GM, but his brief biographical entry here only mentions the award of an IM title.|
|Jan-06-08|| ||MichAdams: <Awarded the International Master title in 1982 and the International Grandmaster title some time later...> |
Gotta love Wikipedia. As for his living in NYC, I guess he finally reached the Promised Land.
|Jan-06-08|| ||goodevans: Can someone tell me how black finishes white off after 30 Qf5, please. I looked at a few lines, such as 30 ... Bc5 31 Re4, but couldn't see the final win. Given white's predicament, I'm sure there's a win there for black.|
|Jan-06-08|| ||johnlspouge: Sunday (Insane) Black to play and win
Material B for N. Both sides are set to attack the opposing K, but Black's pieces are better coordinated and are assisted by Pa4 and Pb4. White has a hidden back-rank mate threat, Rd1 is unprotected, Bd3 is overburdened with Pc2 and Ne4, but Bd3 is also aggressively placed to aid the Qh3 in attacking Ph7, which with Pe6 is a weak point. The Bd3 is presently worth at least an exchange.
Candidate moves: Rxd3, Nxe4, Bxe4, a3, b3, Qf4, Qe5, Qc2+
I find it helpful to list even low priority candidates, to increase my awareness of them.
The back-rank mate threat in particular suggests thinning the pieces in the center to expose the threat. Note: right now, Rxd3 must be answered by Qxd3, to maintain protection of Pc2. Move order is exquisitely important, because Nxf6 is with check and takes priority. A hanging piece at e4 is desirable in some lines.
23...Nxe4 24.Nxe4 Rxd3 24.Qxd3 [cxd Bxe4 25.Rxe4 Qc2+ and #, so White must submit to losing B+N for R] Rd8, and because of the threat Rxd1+, White loses Q+B for 2Rs.
24.Bxe4 Bxe4 25.Rxe4 [Nxe4 Rxd1#] Qxc2+ and 26...Qxd1#
24.Rxe4 Bxe4 25.Bxe4 or Nxe4 25...g6 and White has dropped the exchange without compensation, and the Pa4 and Pb4 can storm to open lines for the extra R.
In the final line, 24...Rxd3 does not seem to work for me any more, but the line given is sufficient anyway. Possibly, 24...Rxd3 leads to a fatal pin on the Nd2, but it is unnecessarily complex. Time to peek.
Ba6 was a nice touch, where I was aiming to produce hanging pieces at e4. Today's puzzle reinforces my conviction that I miss best solutions by not considering all candidate moves. Time to check the kibitzing.
Thanks for the computer analysis, <patzer2> and <MAJ>.
|Jan-06-08|| ||hovik2003: <goodevans>
You missid that after 30.Qf5 (to cover c2 after ...axb2+) black simply picks up hanging white rook, and that is a good enough for white to resign without waiting to get mated.
|Jan-06-08|| ||xrt999: <MAJ: or maybe by resisting some more with 28.Nxf6+ gxf6 (NOT Bxf6?) 29.Qxe6, but the game was lost already.>|
CM preferred the in-between move. 28.Nxf6+ gxf6 [as you said not 28...Bxg6 29.Qxe6+ Kf8 30.Qe2++] 29.Qxe6+ Kh8 30.Qe4 Rxb1 Qxb1 31.Qxe2 was my continuation.
black is up a bishop.
|Jan-06-08|| ||johnlspouge: 23...Nxe4 fails on
23...Nxe4 24.Nxe4 Rxd3 24.cxd Bxe4 25.dxe
|Jan-06-08|| ||znprdx: These kind of positions are nerve-racking:particularily when there are potential multiple piece exchange varaiations. They eat a lot of time on the clock. The tempting ...Rxd3[B] seems to fail to Nxf6[N] +. I doubt I’d have the courage myself and settle for the quiet ...g6. An inspiring idea is 23...Nd5 with Nf6 in mind, taking control of the dark squares. Of course 24.Nf2 h6 and a long slow struggle unfolds as there seem to be a fair number of possble continuations. I expect this to be very interesting, as will be the kibitzing. I hope I am totally surprised....OH HOW SWEET THIS IS!! Now this <CG> is what I mean by a puzzle...play the more or less routine moves and then discover there is a phenomenally imaginative continuation. Seeing Ba6 beforehand is a jaw-dropper|
|Jan-06-08|| ||fm avari viraf: During my chess career spanning more than three an a half decades, I have been confronted with such positions and so the more conspicuous continuation for Black would be 23...Rxd3! 24.Qxd3 other moves are fatal ...Ba6! 25.Qxa6 what else? ...Qxc2+ 26.Ka1 Qxd1+ 27.Nb1 Rc1 28.Nd2 after this it seems White has defended his position but Black may either play 28...a3 & keep the attack going or the passive ...h6 it all depends on the individual style & plans & also keeping in mind the ticking of clocks!|
|Jan-06-08|| ||Jimfromprovidence: I think white could have neutralized black's strong position by playing 23 Qg3 intead of Qh3, in an attempt to trade material.|
Does that make sense to anyone?
|Jan-06-08|| ||skychess: why not 30. Qxe7?|
|Jan-06-08|| ||Ken MacGillivray: If 30.Qxe7 axb2+ 31. Kxb2 Qc2+ 32. Ka1 Qc3#
|Jan-06-08|| ||sheaf: insane ?? i beg to disagree , not at all this whole combo is not very hard to see a3 is the key move which in itself is not that hard at all to find. gg|
|Jan-07-08|| ||kevin86: A nice combination by black. The lethal threat is Bf6+ which will pick off the queen-or worse.|
|Feb-08-17|| ||AlicesKnight: 23...Rxd3 takes the wind out of the sails of the White attack nicely. It makes the difference in a finely-balanced pair of attacks.|
|Feb-08-17|| ||ChessHigherCat: <Jimfromprovidence: I think white could have neutralized black's strong position by playing 23 Qg3 instead of Qh3, in an attempt to trade material.> I think that might lose the exchange because 23 Qg3 Nxe4 24. Qxc7 Nxd2+ 25. Rexd2 Rxc7 26. Bxh7+ Kxh7 27. Rxd8 Bxd8 28. Rxd8. Is that right? I just calculated in my (increasingly sleepy) head. There's also a line with 23 Qg3 Nxe4 where white recaptures the N before trading queens but I think that loses a piece because of the pin on the d file.|
|Feb-08-17|| ||mckmac: There is no doubt, in my mind at least, that had Luther Vandross been a chessplayer, and we don't know conclusively whether he was or not, that he would have been of IM strength, at the very least. |
Taking that as a given, I think he too would have played 8. Qf3 ... followed by 9. O-O-O in this particular line of the Najdorf.
God Bless You Luther.
|Feb-08-17|| ||RandomVisitor: 17.Bxf6 =. After the move played, black has the upper hand.|
|Feb-08-17|| ||RandomVisitor: After 17.Bxf6:
click for larger view
0.00/41 17...Nxf6 18.Nxf6+ Bxf6 19.Qe3 0-0 20.g5 Be7 21.f5 Qxh2 22.fxe6 f5 23.gxf6 Rxf6 24.Kb1 Qf2 25.Qc1 Qf4 26.Rd2 Rd8 27.Nc5 Bd5 28.b3 a5 29.Qd1 Bf3 30.Qc1 Bd5
0.00/41 17...Bxf6 18.f5 0-0 19.fxe6 fxe6 20.Nxf6+ Rxf6 21.Qh3 Rh6 22.Qg3 Bd5 23.Rd2 Qxg3 24.hxg3 a5 25.Be4 Bxe4 26.Rxe4 Nc5 27.Nxc5 Rxc5 28.b3 Rh3 29.Rxe6 Rxg3 30.Re4 Kf7 31.Kb2 Rgc3 32.Rf2+ Kg6 33.Re7 h6 34.a3 bxa3+ 35.Kxa3 Rxc2 36.Rff7 Kg5 37.Rxg7+ Kh4 38.Re4 Rg5 39.Rxg5 Kxg5 40.Re5+ Kxg4 41.Rxa5
< Earlier Kibitzing · PAGE 2 OF 2 ·