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| Mar-30-13 | | M.Hassan: "Very Difficult"
White to play 17.?
Equal in materials
I think Black may want to keep the Rook on the pinned diagonal on e6 17.Nxd5 cxd5
<if...Qxd5 18.Bc4 Qd6 19.Nxg5 Ba6 20.Bxe6+ Kh8 21.Bc4 and Black has lost R+2p for a Night> 18.Rxc8 Qxc8
19.Qxd5 Qc6
20.Bc4 Qxd5
21.Bxd5 Ra6
22.Nxg5 Kh8
23.Nxe6
Black is left weaker and with a terrible pawn structure. |
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| Mar-30-13 | | Abdel Irada: <<•> "The premature attack ...."<•>> What Steinitz said in the 19th century about premature attacks was no less true in 1983. Here, Black has started a kingside pawn storm without first completing his development, and White will make him pay the usual price. <<•> 17. Nxd5! ... > Suddenly the problems in Black's position begin to show themselves. The bishop on c8 is undefended save by the queen, and it is also overworked: It has to watch both e6 and b7, and any attempt to develop the knight on a6 also requires its guardianship. And if the knight *doesn't* develop, the queenside is fatally vulnerable. Meanwhile, the rook on c1 forbids incautious opening of the c-file. Now Black has to decide whether to recapture or counterattack the knight on f3. Not playable, of course, is (a) 17. ...Qxd5?, which fails against 18. Qxd5, cxd5 19. Rxc8†, Bf8 20. Nxg5, when White is already two pawns ahead and has multiple threats which cannot all be parried. < (1) 17. ...cxd5
18. Rxc8, Qxc8
19. Qxd5, Nc6 >
Insufficient, but what is Black to do? His rook on a8 must be defended; else White picks it up and again emerges with two extra pawns. There's no future in (a) 19. ...g4 20. Ng5, (b) 19. ...Kf7 20. Nxg5† or (c) 19. Qc6, Bc4. < 20. Nxg5, Nd8
21. Bc4, Qc6
22. Nxe6  >
With three extra pawns and the attack still in progress, White should mop up easily. <<•> 17. ...g4 > This is the only other chance; any other move allows White to retreat the knight with clear advantage if he can find nothing better. <<•> 18. Nf4, gxf319. Bc4, fxg2
20. Rfd1 >
White can also play 20. Kxg2, but this eliminates all counterplay. The rook on e6 cannot be held, and White emerges with all the trumps. Play might continue 20. ...Qb6 21. Bxe6†, Bxe6 22. Qxe6†, Kf8 23. Qxf5†, etc. White already has the exchange and a pawn in hand; the pawn on g2 will be picked off at leisure, and the attack is not over. Without cataloguing every possible continuation (and they are many if not necessarily independently significant), it seems clear that White's sacrifice is sound and cannot be met. |
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| Mar-30-13 | | Abdel Irada: Interesting. Black's actual continuation (17. ...a4) entirely failed to occur to me. This counterpunch was creative and almost got him out of the attack; in fact, I'd have to spend some more time examining what would happen after 20. ...Kf8 (in lieu of the overaggressive 20. ...f4, which fails to address the problem on the light squares). I suppose one approach would be 21. Bxe6, Bxe6 22. Qb7, when the overworked queen can't hold everything together. In any case, Black's position is too loose and too undeveloped for effective defense. |
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| Mar-30-13 | | Memethecat: 17Nxd5 jumped off the page, 17...cxd5 18.Rxc8 Qxc8 19Qxd5 etc was the continuation I had in mind, instead of 17...Qxd5 18Bc4. 17...a4 was way of my radar.
Enjoyable game to play through! |
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| Mar-30-13 | | vinidivici: lolol....nice puzzle,
And maybe if you get lost somewhere in the calculations, you could be lost for 17.Nxg5. I asserted myself to 17.Nxg5 but thats apparently a mistake. But, the worst thing you choose Nxg5 is not becoming lose , at least Nxg5 just waste the big advantages. D'oh....!! |
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Mar-30-13
 | | agb2002: White has a bishop and a knight for the bishop pair. Black's development looks rather poor. The white queen x-rays the black king. The rook on c1 also x-rays the bishop on c8. The black rooks are disconnected and the connection square, a6, is controlled by the white bishop. The black queen looks overburdened because of the weak spots c8, d5 and g5. All these details suggest 17.Nxd5 and 17.Nxg5. In the case of 17.Nxd5:
A) 17... Qxd5 18.Qxd5 cxd5 19.Rxc8+ Bf8 (19... Kf7 20.Nxg5+ followed by Nxe6 and Rb1) 20.Rb1 wins the knight. B) 17... cxd5 18.Rxc8 Qxc8 19.Qxd5 Ra7 20.Nxg5 Rae7 21.Bc4 recovers the rook with three extra pawns. In the case of 17.Nxg5 Rd6 (17... Qxg5 18.Nxd5 with many threats, Nc7, Nb6, Bc4, Nf4, etc.) and Black seems to minimize the losses. I think I'd play 17.Nxd5. |
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Mar-30-13
| | agb2002: <Abdel Irada: Interesting. Black's actual continuation (17. ...a4) entirely failed to occur to me.> Don't you have the impression that with a real board we wouldn't have missed this intermediate move? |
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| Mar-30-13 | | cyclon: Today here, it seems to me that White uses his development edge into his advantage by the stroke ; 17. Nxd5 cxd5 ---( Slightly surprisingly the only move for Black to "hang on" in the game a little longer. White threats 18. Nf4 and if 17. -Bh6, then 18. Nb6 threatening 19. Bc4 winning more material. If Black plays [after 17. Nxd5] 17. -Ba6, then White plays 18. Nc7 already, or if 17. -Na6, then White's response is 18. Rxc6 and on f.e. 18. -Bd7 [18. -Rxc6 19. Ne7++ is a double-check, so Black can't intervene with 19. -Be6] White can play simply 19. Rxa6. After 17. Nxd5 the -Ra8 is tied down because -Nb8 hangs for the moment AND 17. -Qxd5 18. Qxd5 cxd5 19. Rxc8+ Bf8 20. Rb1 is of course not really on option for Black. ) -----
[ 17. Nxd5 cxd5 ] 18. Rxc8 [ 18. Nxg5 Rc6 ] Qxc8 19. Qxd5 and now if Black plays;
19. -Ra6 comes 20. Bxa6 ( 20. Nxg5? Rd6 ) -Nxa6 ( 20. -Qxa6 21. Nxg5 winning ) 21. Nxg5 Nc7 22. Rc1 and Black can start to grab the scarf into his neck.
19. -Na6 (!) ( actually my "main line" in fact - ) 20.Nxg5 ( I rejected the 20. Bc4 on account of 20. -Nc7 21. Qxf5 h6 and it's not over ) - Nc7 21. Qxf5 Rc6 ( here 21. -h6? 22. Qf7+ Kh8 23. Nxe6 Nxe6 24. Bg4 Ra6 25. d5 wins, or 21. -Rf6/h6 22. Bc4+ with a winning game ) 22. Qxh7+ Kf8 23. Qh5 and now besides 24. Qf7X there's 24. Bf3 to come and f.e. 23. -Qd7 24. Bf3 Black can't play f.e. 24. -Nd5 because 25. Bxd5 Qxd5 26. Nxh7+ winning the Queen. So here White will regain a Rook for the Bishop and will have 5 pawns for the piece in a safe position that entails a win. This was best I could do today, maybe right maybe wrong, but anyhow this was a very difficult puzzle really in my opinion. There was and there is much more than meets the eye in the position even to start with. For example - though I haven't analyzed it much further - in the diagram position it just might be plausible for White to play 17. Nxg5 and if Black doesn't take the Knight but plays his Rook somewhere instead, White just moves his Knight back to f3 and has won a healthy pawn but not YET the game, which is ANOTHER thing. OR, he can continue in case of 17. -Re8 with 18. Nxd5 ( this doesn't work after 17. -Rd6 ) . On the other hand, if Black plays 17. -Qxg5, White continues with 18. Nxd5 and if here Black plays "safely" 18. -Qd8 White probably plays 19. Nf4, but this line 17. Nxg5, though maybe plausible, doesn't impress me as better than 17. Nxd5 as my main line, which I'd choose. |
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| Mar-30-13 | | morfishine: With Black's rooks hanging loosely around, powerful is <17.Nxd5> I too, like <some others> followed 17...cxd5 with <18.Rxc8>, which is very strong after
18...Qxc8 19.Qxd5 and now black must scramble to keep his position from falling apart; I figured Black was lost after 19...Nc6 20.Rc1 Qe8 21.Nxg5 Ra7 22.Nxe6 Kh8 23.Rxc6 What is enjoyable is seeing a GM's response/technique, which is almost always at variance wiith what I see. For example, 17...a4, which is a good, temporary expedient, escaped me; yet White's reaction was decisive, always moving with tempo; At the end, 23.exf4 opening the e-file, simply kills.
Meanwhile, a possible defense starting with 23...Rh6 is not possible due to 24.Qg8+ Sure is interesting seeing how Grandmaster's play |
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| Mar-30-13 | | cyclon: Curiously, I saw Black's possible reply 17. -a4 after !7. Nxd5, but later, perhaps somehow kind of perfunctorily, excluded it from the "acute"-replies list. Still, after my analysis before, it seems relatively clear to me that White will have a win-entailing advantage after Black's 17. -a4 also, with slightly similar lines than in my analysis in their 'nature' , but not with altogether too obvious moves. |
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| Mar-30-13 | | mistreaver: Saturday. WHite to play. 17. Very difficult?
My fingers instantly wanted to move the knight on d5, and i think Spassky remarked
that it's the good idea to let your fingers do the playing.
17 Nxd5
Black has two captures, and a neutral move which simply loses a pawn.
A)
17... cxd5
18 Rxc8 Qxc8
19 Qxd5 Ra7
20 Nxg5 and black is busted
B)
17... Qxd5
18 Qxd5 cxd5
19 Rxc8+
C)
17... Kh8 (i would say, comparatively the best)
18 Nc3 (or perhaps Nb6) and white is simply a pawn up with a better position.
Time to check.
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It seems, that i like everyone else missed black's best answer, a4, that still requires some skill from white.
However i did see straightforward and can't resist giving half a point to me today. 4.5/6 this week |
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| Mar-30-13 | | cyclon: < mistreaver:> To your ( 17. Nxd5 ) 17. -Kh8 which is an interesting try, White can play 18. Nxg5. Now f.e. 18. - Ra7 is impossible because -Nb8 hangs. If 18. -Qxg5, then White plays an important intermediate move 19. f4 ( if 19. Nc7 straight there's disturbing 19. -Rg6 ) and only after Black's 19. -Qg6/-Qh6 ( 19. -Qh4 gets 20. g3 ) comes 20. Nc7 with clear advantage. Of course, 18. -Qxd5? 19. Qxd5 cxd5 20. Rxc8+ wins. If, for example, 18. -a4, White moves 19. Qxb8 Qa5 ( 19. -Qxd5? 20. Qxa8, or 19. -cxd5? 20. Qxa8 ) 20. Qb6 wins. I haven't checked these lines with a computer, so maybe you have something to say. Anyway, it's not TOO difficult to find that after the actual game-line 17. -a4 and the following forced moves 18. Qb6 Qxd5 ( because one threat was 19. Nc7 ) 19. Bc4 White regains the material balance with more active game his pieces co-ordinating better. |
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| Mar-30-13 | | King Sacrificer: I thought about <17. Nxg5> followed by Nxd5 if queen takes but <17...a4> is the move which makes this plan fail i guess. |
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Mar-30-13
 | | kevin86: Sorry,I was lost along the way. |
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Mar-30-13
 | | Jimfromprovidence: <Abdel Irada> <(1) 17. ...cxd5 18. Rxc8, Qxc8 19. Qxd5, Nc6 Insufficient, but what is Black to do?>
I would try 19...Na6 here. That way after 20 Nxg5, black has 20...Nc7, below, which both attacks the queen and defends the rook. 
click for larger viewNow white has to find 21 Qxf5, below, with the threats of 22 Bc4 and 22 Qxh7+ 
click for larger view White will end up ahead, but not by three pawns. |
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Mar-30-13
 | | chrisowen: A good juicy pawn to in dulge ar c3 oven antic I... hedging 17.Nxd5 light in the drivers seat now in evermore a culpa bully c6xd5 when c1 elastic band, snatches the nuts at c8 queen cull ease off the pedal in ko b3 us take d5 white has two pawns for the piece in wander knightg5 and 'alf way there bc4, us slide to win e6 giving a big material edge white, in could continue in a fashion 17...cxd5 18.Rxc8 qxc8 19.qxd5 na6 20.Nxg5 nc7 or b4 change little when f5 or e6 stroke off I negligent as to whether black has a4, bientot in be no need to panic ja bide change I suppose a wavering 18.Qb6 as to put ar qu in d5 or chest ergo a traded b6 and angle bow to, your superior knowledge off ray ba6 needed to save. |
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Mar-30-13
| | chrisowen: Slowly in dawns coted e6 at heard knight he clop g5 a target and you compute a8 rook it is black ace in their e6 a pocket reference ogle ko in us brisket it slam in the oven g5 the jaded knight it now in aka herkulian effort a gl5e6 or affable a8 tip the scales it downed in fives the gauge o graphic 17...a4 18.Qb6 Qxd5 19.bc4 qd6 abled in go 20.nxg5 dulled have pin e6 see one for lights nice. |
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| Mar-30-13 | | Conrad93: I was expecting black to take the knight with the queen. That was the line I analyzed. |
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| Mar-30-13 | | Conrad93: I seriously doubt anyone at ChessGames.com would play this OTB. Most players would evaluate as lost due to the fact that black is up a piece. |
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| Mar-30-13 | | Patriot: Black has the bishop pair.
17.Nxd5 wins at least a pawn since:
17...Qxd5 18.Qxd5 cxd5 19.Rxc8+
17...cxd5 18.Rxc8 Qxc8 19.Qxd5 Ra6 20.Bc4 should win the material back. I think 20.Bc4 is more accurate than 20.Nxg5 since 20...Rd6 21.Qc4 Rc6 or 21.Qb3 a4. I was thinking black had some resistance on 20.Bc4 Rd6 21.Qb5 Bf6 but 21.Qxd6 Qxc4 22.Qd8+ Kf7 23.Nxg5+ |
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| Mar-30-13 | | Patriot: My visualization must be terrible today. 19...Ra6 in the line above?? How about the terribly simple 20.Bxa6? I guess I was fixated on keeping the pin to win material back. It's best not to allow this kind of tunnel vision. Instead just look around and see if simple forcing replies make sense. |
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Mar-30-13
 | | rodchuck: <sleepyirv> and <al wazir> say it all for me. After Nxd5 I certainly wasn't expecting a4. I felt right chuffed at finding for me a good-looking "solution" <al wazir> and then the game proceeded quite differently (but the same result in the end). Can one claim to have solved the puzzle after the correct first move? I don't know. |
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| Mar-30-13 | | morfishine: <DcGentle> Nice post on Today's POTD! I looked at <20.Bxa6> Which still ends up with 4-pawns for the piece after 20...Raxa6 21.Nxg5 Rad6 22.Qb3 a4
23.Qxa4 Re7 24.Qb3+ Rde6 25.Nxe6 Qxe6
Your continuation starting with 19...Na6 definitely lengthens the game; I have no doubt though (due to the excess pawns) that White should win...but it would take a very close look since Black will be aiming to sacrifice a piece for enough pawns to draw [or try to build up a threat with his extra piece] Very nice find! |
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| Mar-30-13 | | James D Flynn: Material is equal but White is fully developed whereas Black’s Q-side is undeveloped, his pawn on g5 is attacked and only his Q defends and he appears vulnerable to sacrofical attacks on the a2 to g8 diagonal.
17.Nxd5 cxd5 18.Rxc8 Qxc8 19.Qxd5 Ra7 20.Nxg5 Re7 21.Bc4 and Wite wins back he sacrificed and has a winning attackack. |
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| Mar-31-13 | | Abdel Irada: <Conrad93: I was expecting black to take the knight with the queen. That was the line I analyzed.>
If you mean 17. ...Qxd5?, that's answered by 18. Qxd5, cxd5 19. Rxc8†, Bf8 (other moves are worse) 20. Nxg5, as in the first note (a) to my solution post. |
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Kibitzing
sac: 18.Qb6