< Earlier Kibitzing · PAGE 3 OF 3 ·
|Jan-21-10|| ||Patriot: Correction: I meant to say "and the knight protects the black queen."|
|Jan-21-10|| ||Antonius Blok: Damn, I made it all but in the end (aspired by the sacrificial vertigo :p) I've stupidely played: 27.Qxf6+ Kxf6 28. Nd5+|
Of course, with less precipitation, Nf5+ clearly appears.
|Jan-21-10|| ||chrisowen: Thomas makes a covenant and goes in search for a material quest. He still believes it pays off attacking rook and bishop: b3 is a ruse to con the queen offside however. The law is staff the pieces together, dont take a leap of faith. Cleric check (psychic handling freeing white's game) Kxf7 Rxd7 and the king falls foul since the ring of white pieces wins the queen once g7 is lopped off..Kg8 Rxg7 Kxg7 Nf5.|
|Jan-21-10|| ||Samagonka: Without reading the other comments, I must say this felt somehow easy in that I had considered almost all the moves albeit not in the correct order.|
|Jan-21-10|| ||kevin86: Funny,the first seconds,i looked for a queen attack via a discovered attack. Then I looked at the sac at d7,but it lead nowhere. My syntax was wrong,the capture at f7 is the key.|
|Jan-21-10|| ||ChessKnightsOfLondon: Not too obvious this one, but lets play the move I thought of Bxf7. Black will probably take back otherwise he'll lose material. Now white can play Rd7 check. Once the king moves white can take the bishop and if king takes there is a hidden check with the Knight which wins the queen. Ok, this looks good.|
|Jan-21-10|| ||playground player: Did White see this all the way through? Like, "Hmmm... if I play 24. Bxf7+, I will bag his Queen on move #27"? I can't do anything like that, and I stand in awe of it.|
|Jan-21-10|| ||YouRang: I actually go this pretty quickly. :-)
The bishop-check sac 24.Bxf7+ is just a forcing move you've got to look at, and that's where I started. After 24...Kxf7, I saw that I recovered my piece a pawn better with 25.Rxd7+, noting that Nf6 is pinned.
I expect black to unpin with 25...Kg8. Next, I noticed that white's Q was in attacking range of my knight, and I thought it might continue with some combination that sets up a K+Q knight fork -- if I can get the king to f6. I noticed that I could do just that with 26.Rxg7+! Kxg7 27.Qxf6+ Kxg6 setting up 28.Nd5+, which leaves me with 2 pieces for a rook, which is okay, but not terrific.
After looking for improvements, I noticed a moment later that I had a discovered attack on black's Q if I can give check with my knight. That, I can do immediately after 26...Kxg7 with 27.Nf5+
|Jan-21-10|| ||Once: <playground player> Believe me, it does come with practice!|
I found this one through a process a bit like making a scrap book. Okay, I know that sounds a bit daft, even for me, so I'll explain...
The thing that jumps out of the starting position is that weak black queen. If I could play Nf5+, her majesty would die. But of course 24. Nf5 isn't check - at least not yet - so we'll clip that one out and forget about it for now. I might be able to play it if the black king wanders into the range of my knight.
Then you notice that the black queen is menacing two white pieces - the Bb3 and the Ra1. Hmmm - I'd better do something about that, but not quite sure what. Maybe I need to move one or both of those pieces?
Then the weakness of f7 becomes apparent, with both the Bb3 and the Qf3 staring at it. We notice that the Nf6 is pinned against f7 by the queen. Not quite sure what to do with this information, so I'll clip it out and use it later.
24. Rxd7 seems interesting, because 24...Nxd7 allows 25. Qxf7+. But then it seems to fizzle out. Cut it out and keep it for later.
All the time we are looking at different variations, we are collecting snippets of information about the position. So far we have the possibility of a discovered attack on the Qc3, the weakness of f7 with a potential pin on the Nf6, the move Rxd7 and the need to do something about the black queen's attack on Bb3 and Ra1.
That's the bit that's like a scrap-book - collecting odd things in case they might be useful later. Then we have to rearrange them into a sensible order. It's only when you start to combine some of these elements that the tactic becomes clear:
24. Bxf7+ (moves one of the threatened pieces and draws the king onto the juicy f7 square to pin the Nf6). 24...Kxf7
25. Rxd7+ (one of our remembered moves, which exploits the fact that the Nf6 is now pinned) 25...Kg8.
26. Rxg8+ (not one of the moves we visualised from that start, but tempting because g7 is within range of Nf5). And the rest is easy. We finally get to play the Nf5+ that we first thought of, or Qxf6 if the black king tries to wriggle away.
Having established that the main street leads to the hotel Victory, we then have to go back and check the side-streets go there too. For the details, see m'learned colleagues who are far better at that sort of stuff than me.
|Jan-21-10|| ||Stoned Knight: very proud of myself, i got it quickly|
|Jan-21-10|| ||wals: Rybka 3 1cpu 3071mb hash preferred a different route for Bla|
Analysis by Rybka 3 1-cpu: depth 17 time 3 min 15
1. (2.66): 24.Bxf7+ Kh8 25.Bd2 Qc7 26.Bxg6 Re6 27.Nf5 Nf8 28.Rac1 Rc6 29.Bxh6 Bxh6 30.Nxh6 Rxc1 31.Qxf6+ Qg7 32.Nf7+ Kg8 33.Qxg7+ Kxg7 34.Rxc1 Nxg6 35.Nd6 b5 36.axb5 axb5 37.Nxb5 Nf4 38.Kf1 Ra2 39.Nc3
|Jan-21-10|| ||CHESSTTCAMPS: <agb2002> <Black can play 28... Nxd7. That's why I preferred 28.Rdd1.>|
Good catch. As Murphy (not Morphy) said, "If you find a good move and look for a better one, you'll probably find a worse one."
|Jan-21-10|| ||cyclon: 24.Bxf7+ and relatively best change for Black is to give the exchange by -K 25.Ra3 followed by 26.Bxe8, because AFTER (24.Bxf7+) 25. -Kxf7 26.Rxd7+ Re7 ( -Kg8 27.Rxg7+ wins Queen, or -Ke6 27.Qh3+ Ng4 28.Qxg4+ Kf6 29.Nd5+ ) 27.Rxe7+ Kxe7 ( -Kf8/g8 28.Rxg7/+ wins) 28.QxF6+ Ke8 29.QE6+ Kd8, and NOW f.e. 30.BN2 White wins just about everything.|
|Jan-21-10|| ||cyclon: But NOT (24.Bxf7+) -Kf8, because 25.BA3+.|
|Jan-21-10|| ||Marmot PFL: Not too hard to find. Kind of crude really, just brute force checks. Yesterday took me probably 5 times as long (not actually keeping track).|
|Jan-21-10|| ||cyclon: My move numbering is wrong and I also failed to noticed in the line 25. -Re7 a move 27.NF5+ and instead proposed 27. Qxf6+, which indeed also wins.|
|Jan-21-10|| ||TheFocus: I am not a tactical genius, but that took about 10 seconds to solve.|
|Jan-21-10|| ||agb2002: <CHESSTTCAMPS: ...
As Murphy (not Morphy) said, "If you find a good move and look for a better one, you'll probably find a worse one.">
Years ago, Anand would have agreed with Murphy because, when asked why he played so fast, he replied that if he spent a longer time in each move he would make mistakes...
|Jan-21-10|| ||DarthStapler: I got it!|
|Jan-21-10|| ||WhiteRook48: I had 24 Rxd7 because i didn't see 24...Qxb3|
|Jan-22-10|| ||David2009: Thursday's problem Tiviakov vs T Roussel Roozmon, 2009 White 24?
click for larger view
Two candidate moves: (A) Bxf7+ and (B) Rxd7. Dealing with (B) Black defences include Qxa1 with powerful threats.
It is too late (23:42 21/01/2010) to go further tonight, it will still be there in the morning.
24 Bxf7+ expecting Kxf7 25 Rxd7+ Kf8 26 Rxg7 intending Qxf6+ if Black captures followed by Nd5+ recovering the Q. White has B+N for R so should win the ending (?). If instead
26...Qe1+ 27 Nf1 Kxg7 28 Bxh6+ Kxh6 29 Rxe1 and White wins. If Black plays 24...Kf8 25 Ba3+ etc.
The Q sacrifice 27 Qxf6?? is unnecessary! 27 Nf5+ wins the Q without it. On to today's problem (in due course).
|Jan-22-10|| ||playground player: <Once> I see I'm going to have to live a lot longer than I expected! Maybe by the time I'm 95 I'll be able to play chess like this.|
|Jan-22-10|| ||TheaN: Thursday 21 January 2010
Getting back to Friday here :).
Material: Black up, ++ / 2
Candidates: Bb2, Rxd7, <[Bxf7†]>
I was looking at ways to trap the Queen but it stops quickly after it's obvious Bb2 cannot be played. So, the attention goes to the Black King and the weak Knights. Knights defending each other CAN be a nice asset but usually, especially in open positions, it's a liability because they cannot move if both attacked. White abuses it differently here, but it shows they aren't well placed. I saw the key soon enough, which is:
<24.Bxf7† Kxf7 25.Rxd7†> it's difficult to spot what a follow-up can be. I noticed one nice follow-up which is impossible. I'm, for once, not gonna work from worst to best, just what I spot first (it might be better for all else too actually).
<25....Re7> loses by force, although not so obvious:
<26.Rxe7† Kxe7 27.Qxf6†!! > on any capture White has the same fork with Nd5†, winning the Queen back with a Knight profit. Clear enough. Okay, next.... Kg8 seems bad due to the same threat:
<25....Kg8 26.Rxg7†! Kxg7 27.Nf5† > and it is. As much, Kf8 loses in the same way.
<25....Kf8 26.Rxg7 > as the pressure is too big now. That leaves the suicidal looking Ke6.
<25....Ke6> although it puts Bg7 en prise, so are both of the White Rooks. However, it's the stronger piece that's still the problem for Black.
<26.Rd6†!! Kxd6 27.Nf5† gxf5 28.Qxc3 > seems to win. To be honest, this ain't actually very clear, but White has all the chances; the Bishop is going to develop with tempo, the Rook enters and the Queen becomes too powerful due to useless Black pieces. Time to check.
|Jan-22-10|| ||TheaN: 3/4
Grrrr. Why did I miss such an obvious mating move like 26.Qh3† in line D, as well as 27.Nf5† immediately in line A (although +N might be preferable over Q/N in an endgame; both win though, and the Queen endgame usually faster). Not my week.
|Jan-24-10|| ||eaglewing: <TheaN: ... 25....Kf8 26.Rxg7 as the pressure is too big now.> No, here you need 26. Ba3+, because 26.Rxg7 Qe1+ 27. Nf1 Kxg7 means, Black is happy.|
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