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Jun-27-10 | | Ferro: EL JUGADOR "BLANCO" ES MALO, PERO EL "NEGRO" LO ES MAS INCLUSO. 25. Axd3, 25.Rd7!, 25. Re7!! (QUE PASA?) |
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Jun-27-10 | | Ferro: Si EL GRANDPLAYER "BLACK" WAS GOOD, NI IDEA! |
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Jun-27-10 | | Ferro: es antideportivo |
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Jun-27-10
 | | chrisowen: Background runner pins, Fridrik sure pulled his weight. Delivers the chinaman rxf6 to forget the break Bxd3 gathers the point. Direct attack black looses pitch once that grateful queen goes up Qg8+. Reign is over as king marches under barrage of check Ke7. Take a punt it mean swerve bracing Kd6 Kxe5 white has a good hold. Mar del Plata unfortunately Erich no cups and little support. |
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Jun-27-10 | | patzer2: Famed Icelandic GM Fridrick Olafsson makes a daring demolition sacrifice with 24. Rxf6+!! to initiate a deep pursuit (King hunt) combination to flush out Eliskases King and solve today's difficult Sunday puzzle. This is the kind of combination that's easy for computer programs to calculate, but are difficult for most humans. My Fritz 10 took about five seconds to call 24. Rxf6+!! the winning move and to label all others as losing. For those like myself, who have difficulty calculating King hunt mates 10 or 11 moves deep, one way to understand the puzzle combination is to work it out the most difficult variations against a strong program and then work backwards from the end of the game to see how much you can visualize, until, hopefully, the winning lines become clear from the initial puzzle position. Here's a breakout based on a move-by-move look with Fritz 10: <24. Rxf6+!! Bxf6>
If 24...Ke7, then 25. Qxe6# ends it.
If 24... gxf6, then 25. Qg8+ Ke7 26.Qf7+ Kd6 27. Nf5+ Kc5 28. d4+! wins as play might continue 24...Bxd4+ (28... Nxd4 29. Rc1+ Kb5 30. Qc4#) 29. Bxd4+ Nxd4 (29... Rxd4 30. Qxe8 Qd7 31. Rc1+ Kb5 32. Bf1+ Rc4 33. Bxc4+ Kc5 34.Bxa6#) 30. Rc1+ Kb5 31. Qc4#. <25. Bxf6 gxf6 26. Qg8+ Ke7
27. Qxh7+ Kd6 28. e5+! Kxe5>
If 28... Kc5, then 29. Rc1+ Kb5 30. Qxc7 Nxc7 31. Bxc6# might follow. <29. d4+! Rxd4>
If 29... Kd6??, then it's 30. Nf5#.
If 29... Nxd4, then 30. Qe4+ Kd6 31. Qxd4+ Ke7 32. Re1+ Kf8 33. Qxf6+ Qf7 34.Qxf7# is one likely finish. If 29... Kxd4, then 30. Rd1+ Kc3 31. Rc1+ Kd2 (31... Kxb3 32. Qc2+ Kxa3 33. Ra1+ Kb4 34. Rb1+ Ka3 35. Qb3#) 32. Qc2+ Ke3 33. Nf5# makes for an amusing mate in the middle of the board. <30. Nf7+ Qxf7 31. Qxf7 Rdd8 32. Re1+> This wins easily enough, but perhaps even stronger is 32. Bxc6! Rf8 33. Re1+ Kd6 34. Qxe6+ Kc7 35. Bg2  <32... Kd6 33. Qxf6 Bc8 34. Qe5+ Kd7 35. Bh3> 1-0 With White piling on and about to win the pinned piece, and Black already down decisive material, resignation is the appropriate response. |
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Jun-27-10 | | Ferro: I already understand why it's dificulty: insane, because it's dificult for me/us to comprove the results finish |
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Jun-27-10 | | Ferro: ...with a single infinitesimal miscalculation!! |
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Jun-27-10 | | Ferro: Y si el "black" se equivoca? |
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Jun-27-10 | | Ferro: Creo sí |
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Jun-27-10 | | Julian713: I was able to figure out Rxf6 by "reading the puzzle" because it allowed the queen to pounce onto the back rank...but beyond that, i couldn't really see how to take advantage of the position. Good Sunday puzzle. |
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Jun-27-10 | | Ferro: Hay que "acceder" a la cabeza de "black" for resolve this problem! |
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Jun-27-10 | | RandomVisitor: Maybe 9.Nb3 is better for white:
 click for larger view Rybka 3:
[+0.29] d=19 9...Bd6 10.Qe2 Nf6 11.Rd1 Ng6 12.Bd2 0-0 13.Na5 Be6 14.Nc4 Bc5 15.b4 b5 16.Ncxe5 Bxf2+ 17.Qxf2 Nxe5 18.Bf4 [+0.33] d=19 9...0-0 10.Qd3 Bb6 11.a4 a5 12.Qc3 Ng6 13.Nfd2 h6 14.Nc4 Ba7 15.Nbxa5 Bd4 16.Qb4 Bc5 17.Qd2 Nf6 18.Nb3 Rd8 |
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Jun-27-10 | | Ferro: Creo sí |
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Jun-27-10 | | Eduardo Leon: This was truly insane and kept me thinking for more than 30 minutes. <PART 1>
<24.♖xf6+! gxf6 25.♕g8+ ♔e7 26.♕f7+ ♔d6 27.♘f5+ ♔c5>  click for larger view<28.d4+!>
Not 28.♖c1+? ♗c4! (not 28...♔b5? 29.d4! ♗xd4+ 30.♗xd4). <28...♗xd4+ 29.♗xd4+ ♖xd4 30.♕xe8> And white wins material.
 click for larger view |
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Jun-27-10 | | Eduardo Leon: <PART 2>
<24...♗xf6 25.♗xf6 gxf6 26.♕g8+ ♔e7> Not 27.♕f7+? ♔d6 28.♘f5+ ♔e5 29.d4+ ♖xd4 30.♕xe8.
<27.♕xh7+ ♔d6 28.e5+!> To "connect" the queen and the bishop.
<28...♔c5>
Not 28...♔xe5 29.d4+ ♖xd4 30.♘f7+, winning the queen. <29.♖c1+ ♗c4!>
But not 29...♔b5? 30.d4! ♖xd4 (30...♕xh7?? 31.♗f3 ♕d3 32.♗xd3#) 31.♗f1+ ♖c4 32.♗xc4 ♔c5 33.♗xe6+, winning the queen. <30.♖xc4+ ♔b5>
 click for larger view<31.♗xc6+! ♔a6>
Not 31...♕xc6? 32.a4+ ♔a6 33.♖xc6.
<32.♗b5+ ♔xb5 33.♖xc7 ♘xc7 34.♕xc7>  click for larger viewAnd this endgame is clearly won for white. |
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Jun-27-10 | | Eduardo Leon: Oh, I missed 25...♗xd3, black's best chance. |
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Jun-27-10 | | Underworld: I still like 24. Bxe5 the best so as to prepare for Rxf6. |
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Jun-27-10 | | Eduardo Leon: Underworld: 24.♗xe5? ♕xe5!. |
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Jun-27-10 | | Underworld: and Rxd6 still, it plays, look at my previous post. |
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Jun-27-10 | | Eduardo Leon: What if 24.♗xe5 ♕xe5 25.♖xf6+ ♕xf6? Black gives the material back (26.♖f1), but at least, his position doesn't fall down to peices. |
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Jun-27-10 | | David2009: <Underworld: and Rxd6 still, it plays, look at my previous post.> Try analysing your line with Crafty - it's free, it's fast, it's fun - and see what happens. For today's puzzle position see the links given in my first post today, F Olafsson vs E Eliskases, 1960 More generally, to set any position up with Crafty, copy the FEN string with White to play and paste it into the Crafty set-up link:
http://www.chessvideos.tv/endgame-t... |
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Jun-27-10 | | Underworld: I'm on 24 hour shift and have no such thing at my fingertips. Rf1 after Qxf6 |
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Jun-27-10 | | Eduardo Leon: Yes. I know that, in your 24.♗xe5 ♕xe5 25.♖xf6 line, 25...♕xf6 is replied wtih 26.♖f1. But, what after that? Giving up two rooks for a queen and getting nothing from the position doesn't look like a good deal. |
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Jun-27-10 | | Underworld: Point is to try to push the king to the center after that, if not, then try for perpetual. I'm finally off shift now. I'M GOING TO BED!! GN all. |
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Jun-27-10 | | gofer: The second day in a row that I have given up. What I thought and what I was going to post is below. But I found 25 ... Bxd3 at which point things
got very difficult, so I gave up and wanted to find out the answer...
...which doesn't exist. So I feel some glimmer of hope considering that ING-GERR-LUND (as is correctly pronounced) were routed, regardless of an odd refereeing decision! I can't quite believe that I am saying this, but I hope that the Argies win! Maradona is at least as enjoyable to watch at the edge of the pitch as he was on it... :-)
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Well, after much consideration, I like...
24 Rxf6+ Bxf6 (gxf6 25 Qg8+ Ke7 26 Qf7+ Kd6 27 Nf5+ Kc5 28 Rc1+ Kb5 29 d4 winning)
25 Bxf6 ...
Now we come to the sticky bit as black has lots of options, but all seem flawed... 25 ... gxf6 26 Qg8+ Ke7 27 Qf7+ Kd6 28 Nf5+ Kc5 29 Rc1+ Kb5 30 d4 winning 25 ... Rd7 26 Rf1 gxf6 (Rf1 Bxg7+ winning) 27 Rxf6+ Ke7 28 Rxe6+ Ke8 29 Rxe8+ Kxe8 30 Qg8+ Ke7 31 Qf7+ Kd6 32 Nf5+ Kc5/e5 33 d5+ winning 25 ... Re7 26 Rf1 Ke8 (Rf7 Bxg7+ winning) 27 Bxf7 Qxe7 28 Rf7 Qd6 29 e5 winning 25 ... gxh6 26 Rf1 and the discovered check is enough to win the game 25 ... Bxd3 26 Bxg7+ Nxg7 (Qxg7 Qf3+ Ke7 Ng5+ winning) 27 Qf3+ Ke7 28 Rd1 Rf8 27 Qe3 |
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