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Aug-23-13
 | | offramp: 16.Ng4 - a well-known mating config. |
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Aug-23-13
 | | Phony Benoni: Quickly picked up the possible mate threat/knight fork on h6. On 16.Ng4 the knight just gets captured, so focused on 16.Nxf7 Rxf7 (16...Qxe4 17.Nh6#) 17.Qe8+ Bf8 and now what? No quick way of stepping up the pressure, and ...Qc5+ is threatened. It would be nice if White could play 18.g4, but 18../Qxg4+ gets rid of that. So maybe 16.g4 risst, while the knight protects it? No, now 16...Qxe4 is slightly more feasible for Black. So maybe it's a non-forcer with 16.Qd4? I didin't see a quick refutation tp that and can't spend much time on it tonight, so I looked at the game. Rats. Another case where a couple of ideas needed to be combined.After 16.Ng4 Qxg4 17.Qd4, the a1-h8 diagonal cannot be guarded. |
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| Aug-23-13 | | Infohunter: I saw 16.Ng4 and figured I had it, not seeing the complications arising from the attempted defense commencing with 16...Qc5+. But White still wins in the end, as even here Black must part with the Queen to escape mate, without adequate compensation. |
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| Aug-23-13 | | Bartimaeus: Quite a double-edged early middlegame position today. White is behind a pawn and his Queen, Knight and pawn are threatened. On the other hand, he has exceptionally well-placed Bishops raking the Black kingside. Underlying objective in this position seems to be get to the Queen on the long diagonal threatening mate on g7/h8. The knight needs to be got out of the way for this and this needs to be done while saving the Queen simultaneously. This doesn't leave us with too many options. Nd7, Nd3 and Nf3 are pointless. Bxf7+ doesn't lead to much and neither does Nxf7. Eliminating possibilities, we finally arrive at Ng4 and this looks promising. Qxe4 doesn't work due to Nh6#. Black has multiple responses though not many work : A) 16. Ng4 Bc5+ 17. Kh1 Qxg4 18. Qe5 and game over
B) 16. Ng4 Qc5+ 17. Bd4 Bxg4 18. Bxc5 Bxc5+ and black has to play the game a piece down and will lose eventually C) 16. Ng4 Qxg4 17. Qd4 Bc5 18. Qxc5 Nc6 19. Bd5 Be6 20. Qc3 f6 and this should enable black to defend the mate threat but white will win back the pawn after Bxc6. Well, if black goes with C), i don't see any way for white to progress. Time to give up and check. Looking at the game line it seems black went with line B but i'd be curious to see what happens if black plays 16...Qxg4. Not sure if there's a way for white to threaten mate after this. |
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Aug-23-13
 | | al wazir: Damn -- I had the right idea, but I opted too quickly for 16. Nxf7 instead of 16. Ng4. If 16...Qxe4, then of course 17. Nh6#, but after 16....Rxf7, 17. Qe8 isn't mate because of 17...Bf8. 17. Qd4 still wins, but not as quickly as the game line: 17...Kf8 18. Qh8+ Ke7 19. Rae1+ Be5 (19...Kd7 20. Qe8#) 20. Rxe5+, etc. |
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Aug-23-13
| | al wazir: /Schwarz/ is German for "black" and /bialy/ is Polish -- or possibly some other Slavic language -- for "white." |
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Aug-23-13
| | al wazir: Oops: 16. Nxf7 Rxf7 17. Qd4 Bc5. |
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| Aug-23-13 | | NewLine: <Bartimaeus> Your (C) line looks like a miraculous escape, but engine found 19.Rae1!, with a strong attack winning a piece: 19.Rae1 Qd7 20.Bd5 Qd6 21.Qc3 Nd4 22.Qxd4 Qb6! 23.Qxb6 axb6 |
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| Aug-23-13 | | M.Hassan: "Difficult"
White to play 16.?
White is a pawn up.
Because White's DSB has the diagonal a1h8, a check by the Knight on h6 or a Queen+Bishop combination can mate the Black King. 16.Ng4!
<if...Qxe4 17.Nh6#>
16...........Qxg4
17.Qd4 threatening mate on g7
17...........Bc5 (the only defense since f pawn can not be moved)
18.Qxc5 White has gained the lost piece
18............Nc6
19.Rae1 Be6
20.Bxe6 fxe6
21.Qc3 e5
22.Rxe5 Nxe5
23.Qxe5
Black has now weak defenses:
23...........Rf6
24.Qxf6
And White's win becomes imminent. |
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| Aug-23-13 | | Stormbringer: Got the attacking idea, missed he best defence. Hmm... maybe that's where I should put more effort |
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| Aug-23-13 | | patzer2: I picked 16. Ng4! for today's Friday solution.
Multiple threats, such as 16...Qxg4 17. Qd4 or 16...Qxe4 17. Nh6#, appeared to me to easily force Black to give up decisive material to avoid a quick mate. However, I didn't see the complexities in the line 16. Ng4!! Qxg4 17. Qd4 Bc5! 18. Qxc5 Nc6 19. Rae1! Qf5 20. Bd5! Be6 21. Qc3!  . Without finding 19. Rae1!, 20. Bd5! and 21. Qc3! in this line (i.e. 16...Qxg4 17. Qd4), White's decisive advantage could, with strong counter play, quickly fade and disappear. |
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| Aug-23-13 | | Nostrils: What's wrong with Nxf7 Rxf7 Qe8+ Bf8 Qe5 ? |
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| Aug-23-13 | | Revenant: Stockfish says white missed the crushing 15. f5! (+9.13 at depth 30), e.g. 15... gxf5 16. Rxf5 Qxf5 17. Ng4 with the familiar fork/mate idea. Count on computers to turn the classics upside-down. In the game, after 15. Bc4, black could have held on with 15... Qf6 16. Nd3 Bf5 (-1.25 at depth 35). It looks scary, but if 17. Qf3, black has 17... Bc5+ 18. Kh1 Bd4 19. Bxd4 Qxd4 solving the problem on the diagonal. If instead 17. Qe3, black goes 17... Nxc2 18. Qf2 Bc5 19. Qxc5 Qb6 with two healthy pawns for the lost piece. |
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| Aug-23-13 | | Nick46: <al wazir: /Schwarz/ is German for "black" and /bialy/ is Polish -- or possibly some other Slavic language -- for "white.">
True. Another meaning of bialy is 'chaste'. Wolfy Bialas chased Schwarz all over the board until he ran him to ground. |
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| Aug-23-13 | | stacase: Once you see that White's Knight can threaten mate, it falls apart. |
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| Aug-23-13 | | Bartimaeus: <NewLine> 19. Rae1! is indeed a terrific move. It nullifies the Be6 defense as now black can't play f6 without losing the bishop. Thanks for running the engines on this one and sharing the results. |
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| Aug-23-13 | | morfishine: I figured <16.Ng4> and if 16...Qxe4 17.Nh6# <Bartimaeus> Nice thinking only improved with 19.Rae1 ***** |
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| Aug-23-13 | | MarkFinan: Why doesn't black talk the pawn with check after 12.b4. ?? |
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| Aug-23-13 | | bubuli55: 16. Ng4 is the only move with threat of mate on h6. And 16... Qxg4 17. Qd4 mate follows. |
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| Aug-23-13 | | bubuli55: I guess Black may continue like 16. Ng4 Qxg4 17. Qd4 Bc5 18. Qxc5 Nc6 19. Bxf7+ Rxf7 20. Qc3  |
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| Aug-23-13 | | Bartimaeus: <morfishine> Thanks man. Have a good weekend. <MarkFinan> 12..Bxb4? 13. Qxb4 <bubuli55> In your second post, 19...Kxf7 seems better than Rxf7. |
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| Aug-23-13 | | Jakob52: I know Ng5 is probably best. But what about: 16 Nxf7? It could go like this: ...Rxf7 17. Qd4, which is a mate threat, so black has to put the bishop or the queen in between (Be5 or Qe5). If Be5 then pawn takes the bishop and the rook will threaten the queen. It all seems like black will loose material or end up mate at g7 or h8 with the white queen. |
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| Aug-23-13 | | MarkFinan: <Bartimaeus> Lol.. Thanks, i completely missed the Queen!! |
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| Aug-23-13 | | mistreaver: Friday. WHite to play. 16.? Difficult.
I would guess that the following is the dagger blow here:
16 Nxf7!
A)
16... Qxe4??
17 Nh6 mate
B)
16... Qxf7
17 Bxf7
That only leaves
C)
16... Rxf7
17 Qe8+ Bf8
And i reckon that white is winning here because black is just tied up.
Time to check and see.ΕΎ
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Hmm after the forced sequence
18 Qe5 Qxe5
19 fxe5 Bf5
20 Bxf7+ Kxf7
21 g4 Ke6
22 gxf5+ gxf5
my computer gives only slight advantage to white. |
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| Aug-23-13 | | JustAFish: May the Schwarz be with you. |
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Kibitzing
sac: 16.Ng4