< Earlier Kibitzing · PAGE 3 OF 5 ·
|Dec-03-09|| ||goodevans: <psmith: ... this was surprisingly easy for Tuesday.>|
Indeed it would have been, but it's Thursday today. At least I hope it is as I'm looking forward to the weekend!
|Dec-03-09|| ||randomsac: Very funny how black gets in white's way to promote a pawn.|
|Dec-03-09|| ||goodevans: <sfm: TGIT - thank God it's Tuesday>|
OK, now I'm getting seriously worried. Let me check the date on the newspaper!
|Dec-03-09|| ||griga262: I'm sure having the common theme helps a lot, but doesn't this week seem easier than usual?|
|Dec-03-09|| ||CHESSTTCAMPS: In this endgame, Leko's pieces are well-placed to assure the coronation of the passed a-pawn:|
There is no defense against this simple interference:
A) 49.Rxa3 Bxa3 50.Nxa3 a1=Q is a trivial win.
B) 49.Rxf8+ Kxf8 50.Nxa3 a1=Q
C) 49.Nxa3 a1=Q 50.Ra7+ Kg6 51.Nb5 (otherwise 51... Bxa3) Qb1+ picks up the knight.
|Dec-03-09|| ||remolino: 48...Ra3 is simple enough. In fact is so simple for a Thursday that I worry I am missing an obvious refutation, which I can't find. |
So 48...Ra3 it is, time to check.
|Dec-03-09|| ||desiobu: 48...Ke6! taking the opposition! Time to check...|
|Dec-03-09|| ||kmzr: it was sooo easy|
|Dec-03-09|| ||eblunt: <chinaski: FSR: <Check It Out> <eblunt>
48...Ba3 should eventually win, too, but White can play on with 49.Ra7+ Kg6 50.Kxf3 a1(Q) 51.Nxa3.
51...Qf1+ 52.Ke4 Qf5+ 53.Kd4 Qf2+ or 53.Ke3 Qc5+ >|
Yes, winning the rook leaving White against . If 50. or 51. the takes on a3 then the gets forked and black is for up.
So Ba3 is not as immediatley winning as Ra3, but is a clear winning position within half a dozen moves nethertheless, so I'm happy I solved it today.
|Dec-03-09|| ||johnlspouge: Thursday (Medium):
Kamsky vs Leko, 2008 (48...?)
Black to play and win.
Material: Up B+P for N. The White Ke4 has 2 legal moves and is vulnerable to check from Pf6 and Rf3. Black has an advanced Pa2 ready for a1=Q, but the White Ra8 is ready to capture it, yielding a theoretical draw. Both Black Bf8 and Rf3 have access to a3, however, suggesting an interference tactic. The Black Kf7 is vulnerable to checks from Ra8 and Nc4.
Candidates (48...): Ra3, Ba3
48…Ra3 (threatening 49…a1=Q
(1) 49.Nxa3 a1=Q leaves White with Q for R
(2) 49.Rxf8+ Kxf8 50.Nxa3 a1=Q leaves White with Q for N
(3) 49.Rxa3 Bxa3 50.Nxa3 a1=Q leaves White with Q for N
The choice between 48…Ra3 and 48…Ba3 appears to require calculation, but can be intuited, because 48…Ra3 rescues Rf3 (and is more forcing than 48…Ba3):
[48…Ba3 Kxf3 a1=Q 50.Rxa3 leaves White with Q for R+N]
|Dec-03-09|| ||cyclon: 48. -Ba3 = CUFFLINKS.|
|Dec-03-09|| ||JonathanJ: this was really easy.|
|Dec-03-09|| ||JonathanJ: <desiobu> Ke6? are you crazy? KxR and game over.|
|Dec-03-09|| ||Patriot: I determined Ra3 to be better than Ba3, using <johnlspouge>'s reasoning. Personally I may have a hard time finding Ra3 OTB--especially in situations where I have < 5 minutes remaining. Time pressure might compel me to just save the rook and the pawn with Rf2. Interference just isn't one of those tactics that are common as compared to forks and removal of the guard.|
<<desiobu>: 48...Ke6! taking the opposition! Time to check...> I think you're missing white's existing threat (49.Kxf3).
|Dec-03-09|| ||charms: I was trying to figure out if there was something wrong with either Ra3 or Ba3 ? Since Ra3 was suggesting itself, I thougt I had there had to be somethingt wrong with it...|
|Dec-03-09|| ||beenthere240: <jonathanJ> <patriot> I think desiobu was joking. Taking the opposition when there's still rooks and bishops on the board is meaningless. Unless he was being trollish.|
|Dec-03-09|| ||Marmot PFL: This seemed pretty simple as the pawn is only one sq away and just blocking the file for one move is enough. Yesterday was trickier as white had queen checks to complicate things.|
|Dec-03-09|| ||beenthere240: Since the problem was so elementary, I took a look at the game. The sequence of moves around 20-25 not only defanged whites attack but left black up a solid pawn and a 2-pawn plus on the queenside -- where the game was ultimately decided.|
|Dec-03-09|| ||jsheedy: 48...Ra3 looks too easy. Is it right? If 49. Nxa3, a1=Q. Or if 49. Rxa3, Bxa3 and black promotes in a move or two. This took me about 10 seconds, so maybe it's not right!|
|Dec-03-09|| ||Patriot: <<beenthere240>: <jonathanJ> <patriot> I think desiobu was joking. Taking the opposition when there's still rooks and bishops on the board is meaningless. Unless he was being trollish.> It's entirely possible he was only joking but I saw no indication he was.|
|Dec-03-09|| ||eblunt: < johnlspouge: [48…Ba3 Kxf3 a1=Q 50.Rxa3 leaves White with Q for R+N] >|
But then 50... f1+ immediately wins the as well leaving black for up. A clear win IMO.
|Dec-03-09|| ||jsheedy: Whew! Other comments have borne me out. Too easy for Thursday.|
|Dec-03-09|| ||karnak64: Naw, the puzzles aren't getting easier. We're getting smarter. :)|
|Dec-03-09|| ||Nullifidian: This was easier than usual for a Thursday. Not that I'm complaining, because it's a brilliant obstructive move.|
48. ... a3! and now White is in trouble. He can take with either the knight, when the pawn queens on the next move, or exchange rooks, but after 49. ... xa3 50. xa3, White cannot stop the pawn.
|Dec-03-09|| ||Eduardo Leon: Aren't you sure this isn't Monday easy? Both 48...a3 and 48...a3 end the game.|
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