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Later Kibitzing> |
| Mar-03-13 | | M.Hassan: "Insane"
White to play 31.?
Equal
31.Nxe5!
Black opts not to take e5 Knight:
31...........f4
32.Qxc5 dxc5
33.Rxd7
threatening mate on h7
33.............Qxd7
34.Nxd7 fxg3
35.Nxf8 gxf2+
36.Kxf2 Rxf8+
37.Kg3 Nf6
38.d6
White is better, has one more pawn and will have a better endgame. Time to check |
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| Mar-03-13 | | DarthStapler: I didn't get it |
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| Mar-03-13 | | mistreaver: Sunday. White to play. Insane.31. ?
After missing yesterday's Saturday puzzle due to 2 rounds on international Zagreb open
tournament, i am back to fail once again.
I quite like the following move in the position:
31 Nxe5
immediatelly winning a pawn sinc black can't take with e pawn due to Qxc5 when he is much better
31... f4
seems like only reasonable reply, and i am convinced that solving the puzzle is connected with finding the correct reply
to the pawn fork here.
32 Qxc5
i quite like this move.
now black has 2 choices:
A)
32... dxc5
33 Rxd7 and now not (33...Qxd7 34Nxd7 fxg3 35 Nxf8 and white is material up)
but
33... Qh4(defending against the mate on h7)
34 Rxh7+ Qxh7
35 Bxh7 and now also Nd7 is threatened, and i think white remains material up
B)
32... fxg3
33 Rxd7 is immediate kill
Time to check.
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Hmm, i think i can take credit for this one. Shame is that i missed Luzhin's move Raa7 (instead of Rxh7+), altought this move still wins and i evaluated the position correctly. I should have perhaps just continued the variation A) for few more moves:
So after
35 Bxh7 ...
if
1)
35...fxg3
then
36 Ra7 threatens mate on g6
36... Rb6
37 Ng6+ transposes into won ending.
if
2)
35... Kxh7
36 Ne4 is quite simply altought there is lenghty
computer line with
36 Ra7+ |
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| Mar-03-13 | | hez: It was very easy to follow the sequence Qd4 etc... But I Totally missed the Qxc5 idea! |
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| Mar-03-13 | | dark.horse: <sofouuk>
"The stuff that dreams are made of." quote from the film, "The "Maltese Falcon". also: "We are such stuff As dreams are made on...", Shakespeare (The Tempest) |
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| Mar-03-13 | | timepass: This is not a puzzle! It is like predicting almost half the game. |
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| Mar-03-13 | | TheTamale: It seems that most solvers included 31)... f4 in their calculations as the continuation for Black. But as it opens up the possibility of mate on h7 on move 34, forcing Black to toss his queen, isn't there some better option? The whole thing is a bit over my head, some I'm not even going to hazard a guess. |
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| Mar-03-13 | | snakebyt: I got the first move Nxe5. Blk didn't step into the obvious trap to take Ne5. I need to think more about defensive moves to solve puzzles like this. f4 HELLO! |
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Mar-03-13
 | | PawnSac: <Gilmoy: Fancy way to win one pawn!> Yea but it's a passer!
The resulting pawn formation adds up to a clear win. the D passer and a 2-1 pair on the king side. Black could not have been faulted for resigning on move 38 but white finishes it out convincingly to earn the point. Very nice combo. |
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Mar-03-13
| | PawnSac: <White's brings a "leash along" (Li Shilong) to drag in the full point.> |
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| Mar-03-13 | | Garech: Okay, so I thought I would have a crack at the puzzle today instead of impatiently going straight through to the answer after a quick guess. Material is even but white enjoys the a file, with pressure on the Bd7. The first thought that comes to mind is 31.Nxe5, undermining the support of the c5 knight, which the white queen has pressure against. However, I now see that f4! Is ostensibly winning a piece, and indeed black has this threat for the next move. Okay; that changes things a little. Nxe5 f4 Qd4 looks good, although how to continue the attack is unclear after dxe5 Qxe5+ and black moving a piece to f6 – probably the knight, or Nh5 is coming with tempo, although it’s unclear if that truly matters, as black is a piece up at this point anyway. Maybe it is better to play Rxd7 before Nxe5, but I don’t see what this achieves after Nxd7. Hmmm – maybe white can sac a different way; Nxf5 is starting to look interesting as a first move. If Bxf5 then Nxe5!? I don’t know; it’s getting too complex, but I’m pretty sure one of these lines must be right. Other forcing moves – Qxc5!? Surely not on a Sunday! Qxc5 dxc5 Nxe5 threatening to take on d7…I don’t think white has anything here. Something else has occurred to me though – Rxd7 and then taking on f5. Rxd7 Qxd7 forced to save f5, this also makes Qg5 possible … perhaps this is it! Won’t white even have crazy moves like Ra7 afterwards? Rxd7 Qxd7 Nxe5! Looks dangerous as well. Black always has Nxd7 though – f5 is falling then but will white have enough for the exchange? Black can always give it back anyway, with Rxf5 if white takes there with a piece. It’s too much. I have to look! I must be on the right line somewhere, surely… -Garech
P.s. "The Stuff that Dreams are made of" Is also in the film "Explorers" where three young kids build a spaceship. |
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| Mar-03-13 | | Garech: Argh! I was kinda there ... bit more thinking might have got it! -Garech |
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Mar-03-13
| | PawnSac: < al wazir: Playing through the game I had a strong impression that black had better moves than the ones made. But I assume that <CG> has computer-analyzed the game and shown that not only is white winning in all variations, but the line played was the only way to win.> I don't know if they do that. Maybe we should ask in the chat forum. I seem to recall some games that were won with less than best moves, which is typical of most games. BUT.. It is interesting to note that black is forced to accept the queen sac, since if he takes the knight instead, trying to break whites combo, he still faces the mate threat.. 32. Qxc5 dxe5 33. Rxd7 Qxd7 34. Ra7
White's play looks pretty sound. |
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Mar-03-13
 | | chrisowen: Cain evade reason ar blip in the schedule go fix a, 31.nxe5 whoosh I yup a 31...f4 enter the center or,
d6 earth gives way in 32.qxc5 light has won a pawn tried in feed d6 or cinch a g3 rink off knight will open f5 lash in st c2 aint it now in ha fib re bc2, us right in can food a thief pawn second about to,
go so 32.qxc5 after grind off a 31...f4 incredible mish mash over the knight and really in light ok effect shred in got an 32...dxc5 look to the heavens in go do it raining forge the mete whether, d8 on defence queen has too 33.Rxd7 Qxd7 taker off,
knight in f6 still looses her bet 33...Nf6 34.Rxd8 majesty down inceded free versus four white i be proof in: 
click for larger view |
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Mar-03-13
| | chrisowen: Soon cadence rising sun foot 34.nxd7 dutiful in,
form you to the race 34.fxg3 in group ball it down,
in every i man plane 35.nxf8 when engaged bin feeds, 35...gxf2+ check first to go ahead in coasting white has aim passer 36.Kxf2 and castle 36...Rxf8+, at redeploy it horace in queen hive mind d5 will run whilst 36...Rxf8+ hoof ledge in theory it is a pine cone too stoop f5 at drench in bishop rook us team together esp otter in c5 riff I see the point, behind backing light sac in e5 to d7 gain entry see at herd hoofed d6 in express for goofball it is right off f5 cringed a tether in knight now charged e5 and d7 any rally? At ramp low inch apostle good castle adapt in mind flog g8 rips half the course, bishop accumulate over time kicking up ply it a rook in adopt him blessed 37.ke3 the way it is dogging around about in derelict black rook white you concreted in a7 he door atcha 45.ra7 on lucky streak for d6. |
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| Mar-03-13 | | Patriot: Material is even.
The only possible "puzzle move" I see is 31.Nxe5:
31...dxe5 32.Qxc5  There's a lot more play here and I'm not so sure about 32.Qxe5+ Qf6. 31...f4 33.Qd4 (threatening double checkmate) Qf6 34.Rxd7! Nxd7 35.Nxd7 Qxd4 36.cxd4 fxg3 37.Nxb8 gxf2+ 38.Kf1 Rxb8 39.Ra7 Nf6 40.Rf7 31...f4 33.Qd4 Rf6 34.Nc6 (34...Bxc6?? 35.Rxh7#) Qe8 35.Nxb8 fxg3 36.Nxd7 31...f4 33.Qd4 Nf6 34.Nc6 Bxc6 35.Rxh7+ Kg8 36.Nh5 Be8 37.Nxf6 + Qxf6 38.R1a7 |
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| Mar-03-13 | | Patriot: I missed a critical move after 31.Nxe5 f4 32.Qd4: 32...dxe5! In the line <31...f4 33.Qd4 Nf6 34.Nc6 Bxc6 35.Rxh7+ Kg8 36.Nh5 Be8 37.Nxf6 + Qxf6 38.R1a7>, 37.Nxf6+ Qxf6 38.R1a7 Qxd4 39.cxd4 Nd7  . 37.Qxf4 wins there. Of course I missed the game line <32.Qxc5!> completely. |
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| Mar-03-13 | | agb2002: The material is identical.
Black threatens 31... f4, but at the cost of opening a very dangerous diagonal, b1-h7. The pawn on d6 is overworked. This suggests 31.Nxe5: A) 31... f4 32.Qxc5 (removing the defender of the black bishop) A.1) 32... dxc5 33.Rxd7 Qxd7 (33... dxe5 34.Rxh7#) 34.Nxd7 fxg3 (34... Rbd8 35.Nxf8 wins a piece) 35.Nxf8 gxf2+ 36.Kxf2 Rxf8+ 37.Kg3 and White should win the ending due to the passed d-pawn, the extra pawn and the weak black pawns on the queen side. A.2) 32... dxe5 33.Rxd7 Qxd7 34.Ra7 Rb7 35.Rxb7 Qxb7 36.Qxf8 fxg3 37.d6 gxf2+ 38.Kxf2 looks bad for Black due to the combined threats to promote the d-pawn and against the king. B) 31... dxe5 32.Qxc5 and White has won a pawn and threatens Rxd7 and d6. C) 31... Re8 32.Nf7+ Kg7 33.Nxd8 Rxe3 34.fxe3 Rxd8 35.Nxf5+ Kf6 36.Nxd6 and White will win the ending. D) 31... Qe8 32.Nxd7 Qxe3 (32... Nxd7 33.Qxe8 Rb(f)xe8 34.Rxd7 + -) 33.Nxf8 Qh6 (33... Qd2 34.Rxh7#; 33... Rxf8 34.fxe3 + -) 34.Rxh7+ Qxh7 35.Nxh7 Kxh7 36.Nxf5 + - [B+3P vs N]. |
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Mar-03-13
 | | paulalbert: Well, in accordance with Vishy's quote of the day, my chess intuition is great, because I saw Nxe5 as the first candidate move immediately, but my intuition did not help much after black played f4. The key really is that once the white Q removes the N on c5 permitting Rxd7 ( with threat of Rxh7#, which I did not see ), black has to give back material. |
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| Mar-03-13 | | Patriot: <agb2002> Did you consider 32.Qd4 and dismiss it early on or did you go straight for the best move, 32.Qxc5, and not look back? If I considered 32.Qxc5 and saw that it was winning easily I certainly wouldn't have looked for anything better. 32.Qd4 though is a seriously dangerous move. |
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| Mar-03-13 | | David2009: Y Yu vs Li Shilong, 2012 White 31.? Insane I'll go with the relatively rational 31.Nxe5 seeing 31...f4 32.Qxc5 dxc5 33.Rxd7 and White is doing well, but of course Black has better. Sunday is a day of rest, so I'll leavi it
there:
====
Well, for once on a Sunday I have got the main line. I can't claim credit for solving this because I haven't examined the alternative defences. Does that matter? Not to me: I use puizzles for light tactical training but my key chess weaknesses are lack of opening knowledge, poor middlegame strategic planning, positional oversights, unforced errors/blunders and superficial endgame play. Compared to those five, my tactics aren't too bad. Here's the puzzle position
click for larger view
set up interactively in Crafty End Game Trainer:
http://www.chessvideos.tv/endgame-t...
The EGT plays the game defence but varies with 37...Rd8. I continued 38.Rd1 Nh6 39.g4 Nf7 40.Kf4 Kg7 41.Bf5 Rd6 42.Be6 Ra6 43.Bxf7 Kxf7
to reach the following Rook ending: 
click for larger view (Yangyi Yu vs Li Shilong 2012 var 44?). It wasn't as easy as I thought: I continued 44.d6 Ke8 45.Ke5 Kd7 46.Rf1 Rxd6 47.Rf7+ Kc6 48.Rf6 Rxf6 49.Kxf6 b4 50.Kg7 Kb5 51.Kxh7 Ka4 52.g5 Kb3 53.g6 Kxb2 54.g7 bxc3 55.g8=Q c2 to get a drawn ending of Q+P vs 3 Pawns (!). Enjoy finding a better way! Here's a Crafty EGT interactive link to the Rook ending: http://www.chessvideos.tv/endgame-t... |
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| Mar-03-13 | | agb2002: <Patriot: <agb2002> Did you consider 32.Qd4 and dismiss it early on or did you go straight for the best move, 32.Qxc5, and not look back? If I considered 32.Qxc5 and saw that it was winning easily I certainly wouldn't have looked for anything better. 32.Qd4 though is a seriously dangerous move.> Actually, 32.Qd4 was my first choice until I had the impression that after 32... dxe5 33.Qxc5 fxg3 White was losing the advantage. So, if 32.Qd4 was a waste of time, how about 32.Qxc5, removing a defender and taking advantage of the knight fork on d7? The rest was a mere to pull the thread. |
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| Mar-03-13 | | Patriot: <agb2002> Thanks! I only wish I had considered that line! |
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Mar-04-13
 | | FSR: <31.Nxe5!> is natural and looks strong. On 31...fxe5, simply 32.Qxc5 leaves White a pawn up with a newly-passed d-pawn. So instead <31...f4, 32.Qxc5! dxc5> (32...fxg3 33.Qxd6 gxf2+ 34.Kf1) <33.Rxd7>. On 33...Qxd7 34.Nxd7 fxg3 35.Nxb8 gxf2+ 36.Kf1 Rxb8 37.Rh7! Nf6 38.Rf7! Nxd5 39.Rxh7+ Kg8 40.Kxf2 and White, with connected passers on the king-side, should win. So the main line is <33...Qh4 34.Bxh7>, threatening Ng6#. On 34...Ne7, 35.Rxe7 Qxe7 36.Ng6+ Kxh7 37.Nxe7 fxg3 38.fxg3 gives White knight and three pawns for a rook. Best is <34...Qxh7, 35.Rxh7+ Kxh7> and now it looks like White will have to move his knight to a weird place like f1 (h1 is worse, obviously) to avoid a fork or skewer (36.Ne2 Rbe8; 36.Nh5 Rf5 37.Nc6 Rbf8 38.g4 fxg3 39.Nxg3 Rxf2). After <36.Nf1>, White has knight and two pawns (including the passer on d5) for a rook. The knight on f1 leaves something to be desired, but the d-pawn is powerful, so I think the position should be good for White. That's the best I can do in my head. |
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Mar-04-13
| | FSR: My analysis wasn't perfect, but pretty good. A good effort for me. |
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Later Kibitzing> |
Kibitzing
sac: 32.Qxc5
