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Later Kibitzing> |
| Aug-01-17 | | ChessHigherCat: <goldfarbdj: <ChessHigherCat>: How do you answer 35. ... Nxb6?> Good question, I overlooked the most obvious reply! |
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| Aug-01-17 | | latebishop: Perhaps Black should have played on for a while as after 35...Kd7 36. Nb6+ Kc7 37. N×c8 Rf2 White will lose his f pawn and his knight is awkwardly placed. |
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| Aug-01-17 | | saturn2: RxNc8 RxR followed by Rh8+ and the fork Nb6+ leaves white with a knight ahead. |
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| Aug-01-17 | | Cybe: 33... Kg8! rules. |
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Aug-01-17
 | | radtop: Hickman's last thought before Anand put the hammer down. I think I got him! |
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| Aug-01-17 | | Once: <ChessHigherCat> 34. Rh8+ does work, but only with the right continuation. The line is: 34. Rh8+ Kd7 35. Raxc8
click for larger viewWhite is a safe piece up. There is no mate with the black rooks and 35...Rxc8 loses to 36. Nb6+. If black tries to get frisky, say with 35... Rxb2+, white sticks his king on c1 and asks black what he is going to do about the mate starting with Rhd8+ followed by Rc6+. That was my line in human mode. With Fritzie turned on, he reckons that 34. Rh8+ and 34. Rxc3 are equally good. With best play the two lines transpose. |
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| Aug-01-17 | | gofer: I am intrigued. I think there is something fundamentally flawed with
<34 Nc3> or <34 Ne3> or <34 Rh8+>. They look okay. All of them seem to have their merits, but
they all have issues. So I think instead I would go for the boring, but solid... <34 Rxc8+ Rxc8> <35 Rh8+ Kd7>
<36 Nb6+ Kc7>
<37 Nxc8 ...>
~~~
Okay, so in summary, what <PB>, <FSR> and <lost in space> said... |
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| Aug-01-17 | | morfishine: <34.Rxc8+> pushes Black into a piece losing sequence ***** |
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| Aug-01-17 | | zb2cr: White wins a clear piece with 34. Rxc8+, Rxc8; 35. Rh8+, Kd7; 36. Nb6+, Kc7; 37. Nxc8. |
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| Aug-01-17 | | malt: With b2 threatened 34.Rh8+ Kd7 35.Ra:c8 R:c8 < 35...R:b2+ 36.Kc1 Rbc2+ ( 36...R:a2 37.Rhd8+ wins ) 37.R:c2 >
36.Nb6+ Kc7 37.N:c8
but 34.R:c8+ R:c8 35.Rh8+ Kd7 36.Nb6+ Kc7 37.N:c8 is neater. |
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| Aug-01-17 | | clement41: Although 34 Rh8+ wins too, with the same eval., 34 Rxc8+ is a better practical decision as it is clear and risk-free while 34 Rh8+ Kd7 forces white to find 35 Raxc8 as 35 Rhxc8 is just equal, plus black still has threats after due to the rooks on the 2nd row |
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| Aug-01-17 | | patzer2: Sometimes Chess cliches are useful. For today's Tuesday puzzle (34. ?) I thought of two: (1) Look for checks and captures. (2) Keep checking, it might be mate. In this case, a series of checks and captures with 34.Rxc8+ Rxc8 (34... Kd7 35.Rxc2  ) 35.Rh8+ Kd7 35 36.Nb6+ Kc7 37.Nxc8 (+4.19 @ 32 depth, Stockfish 8) wins a piece with decisive advantage. Black's decisive mistake was 33...Ke8? allowing 34. Rxc8+ . Instead, 33...Kg8 = holds the position level as play might go 33...Kg8 34.Rh1 Rxb2+ 35.Ka1 Kg7 36.Ne3 Rge2 37.Nc4 Rbc2 38.Rxc8 Rxa2+ 39.Kb1 Rac2 40.Rc1 b3 41.Rf1 Kh6 42.Rg1 Kh7 43.Rh1+ Kg7 44.Rc6 Rf2 45.Rg1 Rfe2 46.Rf1 Kh6 47.Na5 Ra2 48.Rh1+ Kg7 49.Rc5 Kf6 50.Nc4 Rac2 51.Rf1 Kg7 52.Rc7 Kh6 53.Rc6 Kg5 54.Rg1+ Kh6 55.Na5 Ra2 56.Rc5 Kg7 57.Rf1 Kh6 58.Nc4 Rac2 59.Rh1+ Kg7 60.Rc7 Rf2 61.Rg1 Kf6 62.Rc5 =(0.00 @ 41 depth, Stockfish 8.) P.S.: Another pair of non-Chess cliche might be applicable to today's (34. ?) Tuesday puzzle: (1) There's more than one way to skin a cat. (2) All roads lead to Rome. The application being that White can also achieve this win with a different initial move, by way of 34. Rh8+ Kd7 35. Raxc8 Kc7 36. Nxc8  . |
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| Aug-01-17 | | takchess: Not sure if I missed a mate here but this is what I came up with......
rxc8 rxc8
rh8+ kd7
Nb6+ king move
rxc8 |
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Aug-01-17
 | | gawain: <clement41 . . . 34 Rh8+ Kd7 forces white to find 35 Raxc8 as 35 Rhxc8 is just equal.> Thanks for pointing this out. It's instructive to see how Black regains the piece if White tries 35 Rhxc8. I had not noticed the pitfall. |
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| Aug-01-17 | | sid299792: <takchess> Rxc8 Rxc8 Rh8+ Kd7 Nb6+ Kc7 Rxc8+?? Kxb6 is roughly equal |
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| Aug-01-17 | | Pasker: For some reason I never thought about 36. Nb6+ forking the king and the rook, the whole point of this tactic. I am very bad at visualizing knight moves. |
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| Aug-01-17 | | kevin86: A fork ,a skewer ,and another fork- a salad of tactics. Considering the second fork is a salad fork. lol |
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Aug-01-17
 | | tamar: Two forks and a skewer makes for a shish kabob |
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| Aug-01-17 | | Once: <clement41> I suppose it depends on how far you see into the position. The line starting with 34. Rh8+ transposes into the 34. Rxc8 line without much difficulty. The only possible fly in the ointment is that white will want to recapture on c8 with his Ra8 and not Rh8. If you've seen that far, then you'll be happy that there is no practical difference between the two variations. That's why computers give them the same eval. But taking with the Rh8 is not "just equal". It also wins, although a little more slowly. Here's the position after 35. Rxc8: 
click for larger viewNow black can regain the knight but he loses a pawn in the process. 35...Rxc8 36. Nb6+ Kc6 (or Kc7) 37. Nxc8 Kb7 
click for larger viewThis is the trick that black was relying on, but white still comes ahead with 38. Ra7+ Kxc8 39. Rxf7 
click for larger viewWhite is a pawn up, he has 2 pawn islands to black's 3 and can create a passed pawn whenever he wants with a3 or a4. It's not as good as being a knight up, but it's enough. I'd say that this is a puzzle with two equally valid solutions that transpose with best play. |
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| Aug-01-17 | | takchess: Thanks <sid299792> . I see a Knight take doesn't allow a fork by black's king. I think this is the sort of move I missed in calculation but not over the board where I would double check it when the last move came. Cheers, Jim |
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| Aug-01-17 | | BOSTER: After 35.Rh8+ Kd7 36.Nb6+ Kc6 37.Nxc8 when both white pieces on the first black rank, and black king and rook are very active maybe, only maybe, black could continue to play, not resogn. |
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| Aug-01-17 | | BOSTER: Should be not resign. |
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| Aug-01-17 | | RandomVisitor: After 34.Rxc8+ Rxc8 35.Rh8+ Kd7 36.Nb6+ Kc7 37.Nxc8
click for larger viewStockfish_17061704_x64_modern: <2 hours computer time> <+7.04/41 37...Rf2 38.Ne7 b3 39.Nd5+ Kc6 40.axb3 Rxf3> 41.b4 f5 42.Rc8+ Kd6 43.Nc3 Kd7 44.Rg8 fxe4 45.Nxe4 Rf4 46.Nc5+ Kc6 47.Rxg6+ Kd5 48.Rg5 Kd6 49.Nd3 Rf1+ 50.Kc2 e4 51.Ne5 Rf2+ 52.Kb3 e3 53.Nc4+ Kc7 54.Nxe3 Rf3 55.Re5 Kd6 56.Re8 Kd7 57.Re4 Rh3 58.b5 Kc7 59.Ka2 Rh5 60.Nc4 Rd5 61.Re5 Rd7 62.Kb3 Rd3+ 63.Kc2 |
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| Aug-01-17 | | Iwer Sonsch: 34.Rxc8+ Rxc8 35.Rxh8 Kd7 36.Nb6+ and xc8 wins the Knight. |
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| Aug-01-17 | | NBZ: <latebishop> That's fair, however after Kc7 Nxc8 Rf2 Ne7 Rf3 Nd5+ the knight gets back in the game and Black only has 1 pawn for the piece. Against Anand that's probably resignable (against me, not so much!). |
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Kibitzing
sac: 34.Rxc8+