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| Mar-15-06 | | ChessPieceFace: okay, this is my very first post. i got yesterdays puzzle, so i came in stoked, but this one i was completely lost. thanks for everyone who pointed out the proper solutions! |
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| Mar-15-06 | | YouRang: <ChessPieceFace> Welcome aboard! In case you didn't know, the daily puzzles are chosen such that they get a bit harder each day (Monday=easiest, Sunday=hardest). |
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| Mar-15-06 | | Castle In The Sky: It is especially rare for me, but I saw this in about 30 seconds. I only wondered if there might be more than a clearly advantageous exchange. I've been working through the Convekta software, which has greatly helped my ability to see combinations, both on Chessgames and on the board. |
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| Mar-15-06 | | Whitehat1963: O.K., how far were we supposed to see? I saw 19. Rxd5 instinctively in just a few seconds, but I wasn't anywhere near to seeing very far into the succeeding moves! |
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| Mar-15-06 | | chessic eric: Well, I felt good to have seen the exchange sac and that the black king could be forced into a fork on e7 by either Bh6 or Bb6. I doubt I would have conducted the rest of the game as well as Averbakh, but I could win it. I am not happy about missing the option of the Bf3 threat, whether played after 19.Nf6+,Nxf6? or 19...Ke7 20.Nxd5,cxd5. Finding Averbakh's line will have to do, but one can only evaluate a line as best having seen the others - and I entirely missed a good one. |
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| Mar-15-06 | | chessic eric: If I'm being honest, and depending on the time control, I might have deviated from Averbakh's line as soon as move 25. Certainly in a 5 min blitz game I would have tried 25.Rd1+ and 26.Nd5, trying for another fork on b6 or c7 depending on the black king's move. No doubt those threats would lead black to exchange the b7 bishop for the d5 knight, leaving me with my real goal of two bishops and rook versus black's rooks, since most times two bishops are able to dominate a rook. But, after 25.Rd1+,Ke7 26.Nd5+,Bxd5 27.Bxd5,Rc8 28.c4,Rxh2 black has more counterplay than in the game with a valuable outside passer. It is instructive to see how Averbakh plays prophylactically with 25.Bd5, blocking the long diagonal and retaining the h-pawn. |
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| Mar-15-06 | | RandomVisitor: Best play in the 19.Nf6+ line seems to be:
19.Nf6+ Nxf6 (Ke7 gives white a slightly better position) 20.Bf3 Rg8 21.Bxc6 Ke7 22.Bxa8 Bg4
click for larger view
_____________________White to move
and now:
A 23.Bb7 Bxd1 24.Rxd1 a5 25.c3 Bd6 +2.29 sacrificing the exchange for play B 23.f3 Rxa8 24.fxg4 Nxg4 +1.99 keeping the exchange but giving up a pawn |
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| Mar-15-06 | | Caissanist: <euripides><If 19 Rxd5 forces a position worth +3.42, it sounds as if Averbakh missed the best line at some stage, because the game is still quite tense at move 32. Any ideas ?> With the benefit of hindsight, it looks like Averbakh goofed with 25.Bd5, which gives up the two bishops and leaves black with an initiative. Crafty gives Nd3 as strongest (+3.76 25. ... Rf5 26. Rd1 Bf3 27. Rg1 Ke7 28. Rg5 Rxg5 29. Bxg5+ f6 30. Nxe5 fxg5 31. Nxf3 Kf6 32. a3 Kf5
Nodes: 352688340). |
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| Mar-15-06 | | belka: <Whitehat1963: O.K., how far were we supposed to see? I saw 19. Rxd5 instinctively in just a few seconds > You know you're supposed to see more than just Rxd5 :) If you have considered Rxd5, then you can find this line to the end! Nf6+, Bh6+ (or Bb5+), and Nxd5+, are all checks. The tricky point is that Nf6+ doesn't look like it goes anywhere because the King has 3 squares. But look a little further ... Ke7 loses immediately to Nxd5. So the king has 2 squares. Then Bb5+ immediately forces Ke7, so that loses too. Kf8 is the only move. I think getting from Nf6+ to Kf8 is the hardest part of this puzzle. I said this yesterday, and it bears repeating for today's puzzle ... it will help you tremendously to compute forced variations. You can compute checks all the way to the end. You should do so. |
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| Mar-15-06 | | The17thPawn: <al wazir, chessic eric, RandomVisitor and Hoozits> I did not see the Nf6+ option to be honest, but upon examination the line 19.Nf6+,Ke7 20.Nxd5,cxd5 21.Bf3 as well as the 19.Nf6+,Nxf6 20.Bf3, Rg8 21.Bxc6+,Ke7 22.Bxa8,Bg4 line, I think they are more complicated than the game continuation. The former does give white two pawns but leaves bishops of opposite colors. The latter yields a pawn but no clear path to simplification. Assuming Averbakh saw these lines he may of concluded his line was the simplest route to victory (given that there are fewer units on the board to consider). Being an end game specialist this may have been particularly appealing to him. However, your lines work and I did not consider them so once again I didn't get the puzzle. |
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| Mar-15-06 | | RandomVisitor: <The17thPawn>I think it would be fair to say that the 19.Nf6+ line is a curiosity. Obviously, 19.Rxd5 is better, as play in the game demonstrates. Sometimes these secondary moves are playable but not the best, as is the case today. |
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| Mar-15-06 | | foolishmovesss: got this seeing that I got the two minors for rook. However I was trying to find a way after winning the bishop to fork the rooks with my bishop. O well to minors for a rook is good enough. |
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| Mar-15-06 | | euripides: <Caissanist> thanks. I guess Averbakh was keen to keep his rook. Not at all easy. |
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| Mar-15-06 | | dakgootje: *joins the 19. Nf6-club* |
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| Mar-15-06 | | treacheroust: Anything wrong Ng3 trapping the rook, and following with Bf3? |
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| Mar-15-06 | | RandomVisitor: <treach>19.Ng3 Nxe3 20.fxe3 Rf2 and white's advantage has evaporated |
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| Mar-15-06 | | Sami Jr: I think this is a great puzzle. The bishop's proximity to the king via white's knight made me realize the solution. It's a sac that is dramatic enough to win the game and that's what counts. So often, it's easy to play a tit for tat methodical game where a player tries to fork the pieces of the other player, or use checks without the temporary sacrifice of his own piece to give him the advantage in the end. The use of a sac strategy gives me more pleasure in winning, rather than winning due to obvious mistakes made by my opponent. Ever since joinig this forum, my strategic thinking in making temporary sacrifices (to gain advantage some moves down the line) has gone way up in recent OTB games. I never gave it too much consideration before. Thank you chessgames, and keep them coming! |
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Mar-15-06
 | | LIFE Master AJ: Nice game ... I got the first move pretty quickly.
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Mar-15-06
 | | Check It Out: This is my first post; I love this website!
I looked at Nf6+ for awhile, but it seemed to have too many non-forcing moves. I kept looking for ways to get a rook on the open d-file and the king bishop looking at the d8 square for a mate, but couldn't seem to get there; that led me to rook taking the night on d5, the bishop going to either h3 or b6 to check the king to e7, and forking the king and bishop on d5, winning two pieces for the rook. I didn't think this would be the solution (thought it would be something more dramatic), but I decided to go with it. I also looked at hemming in the rook on g7 with Ng3, but Nxe3 seemed to get black out of trouble. Thanks for the great website, chessgames. It has renewed my interest in this great game/art/science. |
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Mar-15-06
| | LIFE Master AJ: http://www.geocities.com/lifemaster... Check out problem # 4!
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| Mar-15-06 | | unferth: Interesting combo, but I'm a little bothered by its selection here, at least if the implication is "white to play and win." Sure, white gets two pieces for rook and pawn, but it hardly seems a clearcut win (at least with less than master technique)--and isn't white a good deal better in the initial position? |
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| Mar-15-06 | | aazqua: I thought this was fairly obvious, simply because there was an obvious starting move, and an obvious forced fork (perhaps after an intermediate bishop check). In fact, I think I'd see this over the board just because it's so obviously worth investigation. |
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| Mar-16-06 | | wintep: Anyone considered 19. Nf6+ Nxf6 20 Bf3? |
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Mar-16-06
 | | al wazir: <wintep>: How is it that you can write but apparently can't read? Half the posts discuss this line. |
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| Mar-23-06 | | patzer2: White's 19. Rxd5! prepares a winning Knight Fork. |
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Kibitzing
sac: 19.Rxd5