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| Sep-08-11 | | whiteshark: Petrosian said to say hello: <25... Nxd1 26. Bxf6 Qh1+ 27. Kxh1 Nxf2+ 28. Kg2 Nxg4> with a technically won position. |
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| Sep-08-11 | | morfishine: Black wins with <25...Nxd1>. Apparently, white was pinning his hopes on 26.Bxf6 but black finishes neatly with <26...Qh1+> 27.Kxh1 Nxf2+ 28.Kg2 Nxg4 and black is up the exchange plus 1-pawn:
click for larger viewOther replies to 25...Nxd1:
(1) <26.Qxd1> Bxb2 27.Nd6 Qd7! This killing pin combined with the crushing threat 28.Rc1 spell finis:
click for larger view(2) <26.Nd6> Here, I like 26...Nxf2 attacking the white queen. If 27.Kxf2 Rc2+ wins immediately; If 27.Qe2 Rc2 28.Qxc2 Qh1+ 29.Kxf2 Qxh2+ and whites queen is lost:
click for larger view |
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| Sep-08-11 | | solskytz: 20 secs, more or less, to see:
1... Nxd1 2. Qxd1 Bxb2 3. Nd6 Rd8 4. Nxb7 Rxd1+ and the 'body count' is strictly in favor of the well known correspondence - chess championand then of course, the gem 2. Bxf6 (tricky and challenging, but WHAT IS THAT?!) Qh1+ (beauty! throw the atom bomb to the corner and make the building explode with a supernova!) 3. Kxh1 Nxf2+ 4. K (stutters) Nxg4 |
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| Sep-08-11 | | pogotheclown: A pretty combination.
I spent a minute trying to exploit the light square weakness on White's King side by rerouting the knight to f3 via some plausible continuation. Then I saw that after Nxd1 Qh1 left a knight fork. Took me about two minutes altogether. Easy when you know something's there to find!! |
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| Sep-08-11 | | CHESSTTCAMPS: Material is even, but white appears to have a strong attack in view of the pinned knight on c3. White expects to win after 25...Nxd1 26.Bxf6 Kf8 (g6 27.Qh4 forces mate) 27.Qxg7+ Ke8 28.Nd6+ winning the queen. So perhaps black should play the defensive 25... Qe4 26.Qxe4 Nxe4 27.Bxf6 Nxf6 28.Nxa7 Ra8 with a likely draw? Or maybe not - white has missed a trick!
25... Nxd1! 26.Bxf6 Qh1+! 27.Kxh8 Nxf2+ 28.Kg1 Nxg4 and white can feel free to resign at any time. Play might continue 29.Be7 Rc1+ 30.Kg2 Rc2+ 31.Kf3 (Kh3 32.f5) Nxh2+ 32.K moves Rxa2 and black is an exchange and 3 pawns ahead. A loss by white that is partially attributable to an exchanged LSB that left weakened light squares in its absence. Time for game review... |
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| Sep-08-11 | | shishio71: Took a little while this early in the morning... 25... Nxd1! where 26. Qxd1 Bxb2 and 26. Bxf6 Qh1+! 27. Kh1 Nxf2+ keeps black easily winning. |
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| Sep-08-11 | | Memethecat: 15 minutes & my feeble effort (< 25...Rc4 26 Qxc4 Nxd1 27 Bxf6 Qf3> ) now looks embarrassing, its so easy to stop <28...Qxf2+ > I do find it difficult to see these nice moves where a sac puts your opponents piece on the square that allows you to jump in with that killer fork (what are they called? Pseudosacrifice?) oh well, yet another part of my game that needs improving. |
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| Sep-08-11 | | Patriot: Hmm...I made the same mistake as the player but thinking it was even. Maybe the player thought it was even also. I saw the threat 26.Nd6 and wanted to play 25...Nxd1 badly but after 26.Bxf6 I was convinced black is lost and that black's ONLY option is to play 26...Kf8 at that point which is terrible. That just shows whenever you become fixated on certain ideas you can talk yourself out of a good combination! Ideas are great and can help one to narrow the candidates but you also must set them aside and calculate all the forcing candidates, particularly ALL checks whenever mate is threatened and you are convinced there is no way out. |
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| Sep-08-11 | | gofer: why not try it yourself... ...colours reversed... http://www.chessvideos.tv/endgame-t... |
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| Sep-08-11 | | ROO.BOOKAROO: Black misses the famous decoy combination already met in two famous games:
Petrosian-Spassky 1966 (game 10)
and
Petrosian-Simagin 1956 (game 5)
Has anybody else than Petrosian ever played this brilliant combination? |
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| Sep-08-11 | | arkansaw: I saw Nd1 and Qh1 and was satisfied already |
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| Sep-08-11 | | Patriot: <gofer> Thanks for the link! Computers are always tricky and because they can make best moves in an instant, it's almost enticing to play just as fast which is a big mistake. The first time I tried it, I ended up drawing. The second time, it gave me the opportunity to trade rook for bishop into a winning K&P endgame. I need to practice winning technique more often. Here's some tips for anyone wishing to improve on winning technique: - Create symmetry. Make even trades, avoiding imbalances unless they are in your favor. Try not to allow counter-play. - Play it simple...no fancy stuff unless absolutely certain it works! - Always be aware of what the computer is threatening and make sure your candidate is safe before playing it. I am curious though. Why provide the link with colors reversed? No critique--just curious! Thanks! |
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| Sep-08-11 | | Creg: 25...Nxd1 26.Bxf6 Qh1+ 27.Kxh1 Nxf2+ 28.Kg1 Nxg4 and black has R+N and an extra pawn vs B+N. ----
Oh my, Black missed this. |
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| Sep-08-11 | | kevin86: Funny,I smelled a knight fork from the beginning,but couldn't find the right road to it. Neither did the holder of the black pieces-too bad! |
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| Sep-08-11 | | newton296: easy to miss this one, I thought right away there has to be a tactic here for black to win material because there is no way for a back ranker mate, yes, NxR but now white is about to mate me with Bxf6! uggh! so I figured I would play g6 to stop the mate but now white has QxN or even Qh3 nenewing the mate threat so white is winning!? hmm! panic set in at this point and I just couldn't see the combo Qh1+ Kh1 Nxf2+ forking the king and Q. |
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| Sep-08-11 | | CHESSTTCAMPS: When I found that Estrin actually lost the "likely drawn" endgame that I suggested in the 3rd sentence of my first post, I was curious to find out if the endgame should have been drawn with best play. I resolved to set up the position with Crafty EGT later in the day. Luckily I found out that <Gofer> had done the job for me. Thanks <Gofer>! Having played through the actual game, I was pretty sure that Estrin also could have improved from this position: 
click for larger viewAfter 27... gxf6! instead of 27... Nxf6(?), the knight is better on e5 and g7 is available for the BK to protect the f-pawn. White's passed h-pawn is no big deal if black is careful. White still has winning chances (as I found from two losses to Crafty before I drew), but I am confident that the game is drawn with best defense. From the diagrammed position, my games with Crafty EGT (translated from colors-reversed position) continued 27... gxf6! 28.f3 Ng5 29.f4 Ne4 30.Nxa7 Rc2! (not Ra8? 31.Re7) 31.a4 Ra2 but that's all I'll give for now. |
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Sep-08-11
 | | doubledrooks: I went with 25...Nxd1. For example:
26. Nd6 Qh1+ 27. Kxh1 Nxf2+ 28. Kg1 Nxg4 and now:
a. 29. Bxf6 Rc1+ 30. Kg2 Nxf6 
b. 29. Nxc8 Bxb2 |
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| Sep-08-11 | | CHESSTTCAMPS: <Patriot> <I am curious though. Why provide the link with colors reversed? No critique--just curious! Thanks!> It's a limitation imposed by the interface. |
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| Sep-08-11 | | sevenseaman: <Patriot> <I am curious though. Why provide the link with colors reversed? > Crafty EGT is a software designed to defend from only the Black side. Another limitation, it does not indulge in or understand any kind of castling. Today it was an easy win against Crafty, otherwise its a very dour defender. |
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| Sep-08-11 | | David2009: Spiridonov vs Estrin, 1971 Black 25...? My guests have gone and I come back to find that White has left the Rd1 en prise. Capture it. End of story.
One line: 25...Nxd1 26.Bxf6? Qh1+ 27.Kxh1 Nxf2+ 28.Kg2 Nxg4 unless White resigns first.
Better is 26.Nd6 and a Rook up Black can choose a safe way to win: 26...Nxf2 27.Kxf2 Qc2+ GOOT!
Time to check:
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Black missed it! And then lost the ending! Puzzle position
click for larger view
colours reversed
click for larger viewSurprisingly (to me), the EGT colours reversed goes for the hopeless ending. Alas I only drew - with victory in sight I moved my R en prise. |
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| Sep-08-11 | | Marmot PFL: 25...Nxd1 is refuted by 26 Bxf6 (g6? Qh4) right? Not so fast...knowing its a puzzle and that the Q on the long diagonal had to be the key I eventually found 26...Qh1+, but even then not very fast. Because of that I am somewhat happy that both masters missed it. |
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| Sep-08-11 | | Patriot: <sevenseaman> & <CHESSTTCAMPS>, Thanks for the info! |
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| Sep-08-11 | | dark.horse: Good idea, <once>. I'll have to give it a try. |
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| Sep-08-11 | | Mkhitar: Wow I found it! 25...Nxd1 26.Bxf6 Qh1+ 27.Kxh1 Nxf2+ 28.Kg1 Nxg4. And then thought in the game Estrin actually made it but was surprised that he didn't. sad... |
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| Sep-08-11 | | sevenseaman: <David2009> Good to see you come back hungrier and sharper. <Better is 26.Nd6 and a Rook up Black can choose a safe way to win: 26...Nxf2 27.Kxf2 Qc2+> 27...Qc2+? You mean Rc2+ ok? |
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