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| Jan-31-09 | | Once: <psmith: I think White is winning in the position. > That makes two of us.
<Can you suggest a defense?> Nope.
Would I have resigned here?
Also, nope.
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| Jan-31-09 | | RandomVisitor: There is <bougre>'s 38.Qxf7 as well as 39.Nc6! threatening Ra7. 20.Nc5 0.81/16 or 20.a4 0.63/16 are perhaps stronger than 20.h4. |
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| Jan-31-09 | | Once: <TomOhio: I think the answer to 55... Be2 is 56. Kf2 Bh5 57. g4 and Black cannot stop Ng4. > 56...Bh5??? just drops the bishop to 57. g4 and the bishop is trapped. A later Ng4 does not even come into it. Your 56. Kf2 Ra2 57. Ke1 line is certainly very grim for black. But not having any good moves is not grounds for resignation. If black can construct a fortress there may yet be drawing chances - he could for example, just shuffle his rook backwards and forwards between a2 and b2. Or sac the f pawn with f6. I am not saying that black wins or even draws from this position. It just seems odd to me to resign here or to end a puzzle here. The final position just does not feel like a solution, which I suspect is why so few people found it today (without silicon assistance). |
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| Jan-31-09 | | Knight101: Black may have gotten a draw after position 55, but we don't know what time control was for this game. Also, Black has no easy way to dislodge White's killer h6-pawn, a long with, White's advanced King side pawn sturcture with a knight giving White the advantage over Black two Bishops. |
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| Jan-31-09 | | GreenArrow: 55...Be2 is obvious rubbish and totally inhuman. 56.Kf2 Ra2 57.Ke1 Rb2 58.Rc8 black is busted. 57...d4 must be a computer move because it looks absolutely ridiculous and clearly black is losing after this. |
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| Jan-31-09 | | RandomVisitor: As pointed out above, 56.Kf2 is a good response to 55...Be2. I have:
click for larger viewAnalysis by Rybka 3 : <20-ply> 1.  (2.08): 56.Kf2 Ba6 57.Ng4 Ra7 58.Rxa7 Bc5+
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| Jan-31-09 | | RandomVisitor: To show that the line wins, white needs to demonstrate a win after these (possibly) playable moves by black: 51...Ba4 or 51...Bc8
52...Rb8
53...Rb8 or 58...Bd1 |
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| Jan-31-09 | | TomOhio: <Once>: Black MUST stop Ng4. Afterward, it's Nf6+ and Black is toast. There's only a limited number of ways Black can keep the Bishop on the diagonal. Also, with Black's Rook off the 8th rank, White can pin pin the Bishop with Rc8, then wins with Be7. Black can't stop it all, as his pieces have too many tasks. |
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| Jan-31-09 | | RandomVisitor: Best chance for black is likely 51...Bc8, but this too might also fail. 1: Vlastimil Hort - A Rodriguez, Amsterdam II 44/58 (Hort,V) 1987
click for larger viewAnalysis by Rybka 3 : <23-ply> 1. <(0.36): 51...Bc8> 52.Rc7 Ba6 53.Nc6 Rc8 54.Ne7+ Bxe7 55.Rxe7 Bd3 56.Ra7 Kf8 57.Kg3 Ke8 58.Kh4 Bf1 59.g3 Bg2 60.Rb7 Bf1 61.Bf6 Bd3 62.g4 Be2 63.Ra7 |
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| Jan-31-09 | | TomOhio: <<<GreenArrow: 55...Be2 is obvious rubbish and totally inhuman. 56.Kf2 Ra2 57.Ke1 Rb2 58.Rc8 black is busted. 57...d4 must be a computer move because it looks absolutely ridiculous and clearly black is losing after this.>>> The idea behind 57...d4 is if
58.cxd4 Bb4+. |
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| Jan-31-09 | | RandomVisitor: 51...Bc8 52.Rc7 Ba6 and now:
1: Vlastimil Hort - A Rodriguez, Amsterdam II 44/58 (Hort,V) 1987
click for larger viewAnalysis by Rybka 3 : <25-ply> 1. (0.36): 53.Nc6 Rc8 54.Ne7+ Bxe7 55.Rxe7 Bd3 56.Ra7 Kf8 57.Kg3 Ke8 58.Kh4 Bf1 59.g3 Bg2 60.Re7+ Kf8 61.Rd7 Be4 62.g4 Ke8 63.Rb7 2. (0.29): 53.Kh3 Rc8 54.Rxc8 Bxc8 55.Nc6 Bc5 56.Ne7+ Bxe7 57.Bxe7 Ba6 58.Kh2 Bb5 59.Kg3 Bd3 60.Kg4 Bf5+ 61.Kg5 Be4 62.g3 Bf5 63.Bc5 3. (0.29): 53.Kg3 Rc8 54.Rxc8 Bxc8 55.Nc6 Ba6 56.Ne7+ Bxe7 57.Bxe7 Bd3 58.Kg4 Bf5+ 59.Kg5 Be4 60.g3 Bf5 61.Bc5 Be4 62.Kf6 Bf5 63.Bb4 Bd3 64.Bd6 Bf5 65.Ba3 Be4 66.Be7 |
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| Jan-31-09 | | zenpharaohs: GreenArrow: "57...d4 must be a computer move because it looks absolutely ridiculous and clearly black is losing after this." Things are pretty tough for Black, you don't see the point of opening the diagonal so the dark square Bishop can get out with check? Black doesn't have a lot else in the tool box at this point, and getting all three of his pieces coordinated against a stalemated King, when White can't use his dark square Bishop much in that half of the board? This can (for example in case of 58 ... Bd3) hold the White Rook on the back rank. Rodriguez is rated about 2500 Elo, I don't know what he was when this game was played, but given time, someone like that could definitely have found this move. I think there was time pressure in this resignation.
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| Jan-31-09 | | johnlspouge: < <RandomVisitor> wrote: [snip] 56.Kf2 Ba6 57.Ng4 Ra7 58.Rxa7 Bc5+ > Toga concurs at 21-26 plies, evaluating at about +1.7 Ps. I apologize to CG for my earlier comment about computer checks on the puzzle. |
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| Jan-31-09 | | SamAtoms1980: Well, I went with 49 g4 with a view to 50 f5.
And with that I'll give way to the real players. |
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| Jan-31-09 | | Woody Wood Pusher: Looks like I'm another Ra2 sucker as well.
hehe |
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| Jan-31-09 | | UnsoundHero: After 55...Be2 56 Kf2 Ba6 57 Ng4 Ra7 58 Rxa7 Bc5+ 59 Kf3 Bxa7 60 Be7! black is hard-pressed to stop 61 Nf6+ Kh8 62 Bf8 with the idea of administering mate on g7. 60...f5 looks forced, but white should win the ending after 61 exf6. But, of course, black shouldn't resign after 55 Ne3. Black either lost on time, or perhaps because of time. |
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| Jan-31-09 | | felixd: This isn't a difficult problem.... I found it in like 30 seconds.... |
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| Jan-31-09 | | psmith: <felixd> and you saw all the analysis that's been posted here too, did you? |
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| Jan-31-09 | | zenpharaohs: psmith: "<felixd> and you saw all the analysis that's been posted here too, did you?" Well I think I go both ways. I found the game line pretty quickly. It was figuring out whether it actually works which takes all the time. |
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| Jan-31-09 | | jovack: saw the initial theme, but had a different continuation in my mind. |
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Jan-31-09
 | | An Englishman: Good Evening: How bizarre. I saw this line, thought it was the best of the candidate variations--and deduced that I had to be wrong because it was so weak. I'm still not convinced White has a win. So do I claim zero credit, full credit, or a partial? |
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| Jan-31-09 | | vijaymathslpjz: the pawn on h6 is more like a piece...Ra2 was the only good move.was tough figuring out why. |
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| Feb-01-09 | | RandomVisitor: The best try for Black is probably this line:
49.Rb2 Qd7 50.Qxd7 Bxd7 51.Rb7 <Bc8> 52.Rc7 Ba6 and now: 1: Vlastimil Hort - A Rodriguez, Amsterdam II 44/58 (Hort,V) 1987
click for larger viewAnalysis by Rybka 3 : <30-ply> 1. (0.45): 53.Nc6 Rc8 54.Ne7+ Bxe7 55.Rxe7 Bd3 56.Ra7 Kf8 57.Kg3 Ke8 58.Kh4 Bf1 59.g3 Bg2 60.Re7+ Kf8 61.Rd7 Be4 62.g4 Ke8 63.Rb7 2. (0.29): 53.Kh3 Rc8 54.Rxc8 Bxc8 55.Nc6 Bc5 56.Ne7+ Bxe7 57.Bxe7 Ba6 58.Kh2 Bb5 59.Kg3 Bd3 60.Kg4 Bf5+ 61.Kg5 Be4 62.g3 Bf5 63.Bc5 Be4 64.Kf6 3. (0.29): 53.Kg3 Rc8 54.Rxc8 Bxc8 55.Nc6 Ba6 56.Ne7+ Bxe7 57.Bxe7 Bd3 58.Kg4 Bf5+ 59.Kg5 Be4 60.g3 Bf5 61.Bc5 Be4 62.Kf6 Bf5 63.Bb4 Bd3 64.Bd6 Bf5 65.Ba3 Be4 66.Be7 |
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| Feb-02-09 | | patzer2: For the Saturday, Jan 31, 2009 puzzle solution, White plays the decoy/ deflection sham sacrifice offer 49. Rb2!!  . The initial idea, as noted by <johnlspouge> is <49…Qxb2 50.Nc6 (threatening 51.Ne7+ Kh8 52.Bf6#)>. One amusing possibility here is 49...Qxb2? 50. Nc6 Bb7?? 51. Ne7+ Kh8 52. Bf6#. Interesting and worthy of study is <Random Visitor>'s deep 30-ply Rybka analysis above indicating defensive chances for Black after 49.Rb2 Qd7 50.Qxd7 Bxd7 51.Rb7 <Bc8> 52.Rc7 Ba6 . GM Raymond Keene once observed on this site, "not every combination" has to lead to a "forced win." Perhaps this is a good example of one which falls in that category. |
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| Feb-02-09 | | Terry McCracken: A draw has been found in White's combination, Black missed 51..Bc8! 52. Rc7..Ba6!= I'm sorry I didn't take the time to look at this. If White is not careful Black could turn the tables on White. This combination as clever as it is can't force a win. |
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