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Nov-12-13
 | | bright1: Very nice attack by White starting with move 10 |
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| Nov-12-13 | | BLarsen1967: Yes! -- But I think black should've played 9..Nc6 |
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Nov-29-13
 | | Phony Benoni: Ok, I didn't spot 11.Nxd5. Let's look at Black's alternatives to 11...Qxf7:
click for larger viewSince she has to stop 12.Nxe7# while saving her queen, it looks like Black's choices are limited to 11...Qh4 and 11...Qe4. The former is easily dismissed by 12.g3, but the latter is a bit better. 12.f3 allows 12...Bxd4+. However, 12.Re1 seems good enough. |
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| Nov-29-13 | | Patriot: I see some really interesting moves here. First, material is even and 10...Nxf4 is threatened. 10.Nxf7 (hitting the queen with bishop and knight, while threatening a discovered check) 10...Qxf4 (most critical) 11.g3 Qf6
10...Qxf4 11.Nd5 (seems better) Qxf7 12.Nxe7+ Kh8 13.Bxf7 Rxf7  10...Qxf4 11.Nd5 Qh4 12.g3 Nxg3 13.fxg3 Qh5 14.Nxe7#
So I think 10...Qb4 is probably best.
10...Qb4 11.Ne5+ Kh8 12.a3 Qxb2 13.Na4
10...Qb4 11.Ne5+ Kh8 12.a3 Qa5 13.b4 Qb6 14.Nd5 Qe6 15.Nxc7 I think that works. |
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| Nov-29-13 | | Patriot: Going back over this, I failed to catch a few critical moves. <10...Qxf4 (most critical) 11.g3 Qf6> Here I missed 12.Nd5, which wins. <10...Qxf4 11.Nd5 Qh4 12.g3 Nxg3 13.fxg3 Qh5 14.Nxe7#> 13.hxg3 wins. 13.fxg3 Bxd4+ was missed even though I searched for the difference between the two moves. The last two lines were good, although I spent a little time looking at 12.Nd5 and had a hard time making anything stick. Overall I am pretty happy with what I found. |
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| Nov-29-13 | | M.Hassan: "Difficult"
White to play 10.?
Each side has lost a pawn.
Took me long time but I think I have got it!
10.Nxf7 Qxf4
11.Nd5!
Queen is out in a crouded combination and can be attacked easily
11...........Qh4
12.g3
<if...Qxd4 or ...Qh3, loosing protection of e7, then 13.Nxe7#> So, in fact Queen has no safe square to go to
12.............e6
13.gxh3 exd5
14.Bxd5 Nf6
15.Bc4
And the rest of the story should be clear.
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| Nov-29-13 | | Dr. J: Would anyone care to evaluate the following:
11...Qh4 12.g3 e6 13.gxh4 exd5 14.Bxd5 Rxf7 15.Qf3 Nf6 16.Bxf7+ Kxf7 
click for larger viewI've never seen anything like this, QRPP v. bbnn, and I suspect ordinary evaluations are not useful here. |
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Nov-29-13
| | Phony Benoni: <Dr. J>> I've found a few examples. For example, Tal vs Speelman, 1987 after <28.bxc3>:
click for larger viewUnfortunately, Black blundered with <28...e5> and resigned immediately. Without the extra pawns, here are some other examples. One for the queen, from H Reefschlaeger vs K Wockenfuss, 1975 after <28...hxg4> 
click for larger viewBlack was able to uses the open files on the kingside to put unbearable pressure on the White pieces. Here's one for the defense, from T Besztercsenyi vs P Dely, 1992 after <17...Rxd8>: 
click for larger viewThe game was agreed drawn a few moves later. Black's position is solid, and there seem few opportunities to open lines. This seems to be the case in many quiet positions if the minor pieces are secure and the heavy pieces have no targets worth taking. One for the pieces, from R Felgaer vs S Fedorchuk, 2005 after <31...Rxb8>: 
click for larger viewBlack's pieces coordinged well against the exposes White king. In general, as so often happens, the side with the initiative and the superior piece coordination is better. In your analysis position that would appear to be White, even with the weak pawns. |
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| Nov-29-13 | | patzer2: One discovered attack leads to another in the 10. Nxf7!! Qxf4 11. Nd5! Qxf7 12. Nxe7+ solution to today's Friday puzzle. |
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| Nov-29-13 | | Funology: I found this easier than Wednesday! (Missed the key Qf3 move). Not too many branches on the variation tree here. |
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| Nov-29-13 | | lost in space: Haven't found 11. Nd5!!, so no blossoms for me today |
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| Nov-29-13 | | Captain Hindsight: Powerful play by Millet! |
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| Nov-29-13 | | hedgeh0g: A nice one, this:
10.Nxf7 unleashes a double attack on the queen, so 10...Qxf4 is essentially forced if Black doesn't want to simply be down material. 11.Nd5 hits the e7 square with a tempo on the queen, which has to defend the mate threat. 11...Qh4 12.g3 Qe4 13.Re1 seems sufficient to force Black to give up queen for rook to stave off mate. So Black should probably play 11...Qxf7, but after 12.Nxe7+ Kh8 13.Bxf7 Rxf7 14.Nxc8 Nc6 (14...Nd7) 15.c3!, preparing Qb3, I expect White stands much better in spite of Black's ostensible material equality, because the whole queenside is about to get ravaged. |
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| Nov-29-13 | | morfishine: Its either 10.Nxf7 or 10.Ne4
I'm too stuffed from Thanksgiving to visualize more than one-half move ahead :) ...not mention my Packers got crushed :(
***** |
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| Nov-29-13 | | dTal: Hey I got the key move Nd5 in about 3 minutes! Rare enough for a Friday that I felt compelled to post! |
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Nov-29-13
 | | perfidious: <dTal: Hey I got the key move Nd5 in about 3 minutes!> This is refreshing honesty and a most welcome departure from the oft-seen solution claim of 'nanoseconds'. Good for you, mate! |
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| Nov-29-13 | | Dr. J: <Phony Benoni> Very nice research, indeed! Is that from Endgame Explorer? If so, perhaps I should consider getting Premium Membership! <...The game was agreed drawn a few moves later. Black's position is solid, and there seem few opportunities to open lines. This seems to be the case in many quiet positions if the minor pieces are secure and the heavy pieces have no targets worth taking....
Black's pieces coordinated well against the exposed White king. In general, as so often happens, the side with the initiative and the superior piece coordination is better.> This was my thought, too. It would seem that standard material point-counting is of little value. <In your analysis position that would appear to be White, even with the weak pawns.> This I am not so sure about. Unlike any of your examples, we have superior coordination for one side vs. superior pawn structure for the other. Can Black develop her Q-side, and even obtain the advantage by attacking the weakened K-side, or can White keep her bottled up, and create targets? The validity of the original combination may hang on this point. At any rate, this would seem to be an alternative to the game that maybe Black should have chosen. Do we have an engine evaluation? And in this position, should we believe it? |
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| Nov-29-13 | | SimonWebbsTiger: @<perfidious>
<This is refreshing honesty and a most welcome departure from the oft-seen solution claim of 'nanoseconds'.> ...and "I am making a webpage" :) |
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| Nov-29-13 | | john barleycorn: < SimonWebbsTiger:
...and "I am making a webpage" :)>
and "I am making a webpage in nanoseconds" |
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| Nov-29-13 | | agb2002: The material is identical.
Black threatens 10... Nxf4.
The white pieces can attack the black queen with 10.Nxf7: A) 10... Qxf4 11.Nd5
A.1) 11... Qxd4 (Bg4, Qg4, Qf5) 12.Nxe7#.
A.2) 11... Qe4 12.Re1 Qxe1+ 13.Qxe1 Rxf7 (13... Kxf7 14.Nxc7+ and Nxa8) 14.Nxc7 Ra7 15.Qxe7 wins. A.3) 11... Qh4 12.g3 Bg4 13.gxh4 Bxd1 14.Nxe7#.
B) 10... Qf6 11.Nd5 Qe6 12.Ng5 traps the queen: 12... Qc6(f5) 13.Nxe7+, 12... Qd7(g4) 13.Nf6+, etc. C) 10... Qb6 11.Nd5 Qe6 transposes to B.
D) 10... Qb4 11.Ne5+ e6 12.a3 Qb6 (12... Qxb2 13.Na4) 13.Be3 and White has a considerable advantage. |
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| Nov-29-13 | | agb2002: I forgot
A.4) 11... Qxf7 12.Nxe7+, etc.
the game line. |
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| Nov-29-13 | | dakgootje: Wasn't immediately sold on Nxf7, so I tried to make 10. Nxg6 work. It actually has some interesting ideas, e.g. with the hanging h5-knight or 10. ..Qxg6 11. Bd3 Qf6 12. Qxh5 Qxf4 13. Qxh7# However after 10 ..Nxf4 11. Nxf8 Kxf8 there's nothing [white probably a bit worse]. And after 11. Nxf4 Qxf4 12. Nd5 Qd6 white is a piece down for hardly anything. So that's a shame. |
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| Nov-29-13 | | diagonalley: looked at 10 NxBP but didn't foresee an exchange of Q and a couple of pawns for three minor pieces - miles from being conclusive (IMHO)... i rate this as VERY difficult |
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| Nov-29-13 | | King Sacrificer: I found the game line in about 2 minutes. It must be an accident! |
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| Nov-29-13 | | patzer2: <dakgootje: ... tried to make 10. Nxg6 work> After 10. Nxg6 Nxf4 it looks about equal to me. |
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Kibitzing
sac: 10.Nxf7