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Mar-09-12
 | | scormus: <Memethecat> No problem at all! Of course I couldn't imagine you were serious ;) <62 Rc4+> Thanks, I can tell you I got quite buzz when at last I saw it. |
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| Mar-09-12 | | gofer: <David2009> As I said in my post the process of trying to beat Crafty EGT was a very nice learning curve, I only succeeded because, in hindsight, I was sticking to some very "simple" principles, which exist from the very start , but take 12 or so moves to come to "zugszwang" where black really has no good moves... 60 b6 Rb7
61 Rb3 Kc5
62 a5 Ba6
At this point the dice are set. Rb3 stops Kc5 from reaching Pa5 and Pa5
cannot be attacked by any other piece as Rb7 is to busy. But we need some more space for our king and our knight... 63 g4 hxg4
64 Nxg4 Kc4
65 Rb1 Kd5
The black king can't allow the knight to amble across to f6 or let the king access along the a8-h2 diagonal so has to retreat. This allows white to gain even more control over the board cutting out the king's access to
both pawns!
66 Rc1! f5
click for larger viewBlack has a nice strong pawn structure and is going to start a pawn charge of its own, but white has a simple plan, get Ng4 to c5 and its all over! 67 Ne3+ Ke5
Again black is supporting his pawn push.
68 Nc4+ Kd5
69 Nd2 f4
Black starts the pawn push
70 Nb3! ...
click for larger viewBlack suddenly realises that the deadly Nc5 is coming at which point
its game over.
70 ... Bc4
71 Rc3 ...
click for larger viewCool calm composure! The bishop can't move, the king can't move, the pawns can't move. Only the rook is able to move and moving is death! 71 ... Rh7
72 Rxc4!! ...
click for larger viewRooks are unbelievebly bad at stopping connect pawns. The rook leaving b7
has given white just enough time to promote its pawn! 72 ... Kxc4
73 a6 ...
White offers up both minor pieces for a queen. If black accepts then
white promotes with check and the black king is further away from its
storming pawns! So <Crafty> tries not to! 73 ... e3
74 fxe3 fxe3
75 Nc1 Rxh4+
76 Kg3 ...
The black rook and king are just too far away to stop the pawns... 76 ... Rh5
77 a7 Ra5
78 b7 Rxa7
79 b8=Q ...
click for larger viewGame Over player two...
That said, <Doublerooks> solution looks quicker and simpler... :-) |
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Mar-09-12
 | | chrisowen: 60.B6 Off in trundles it speaking of bind rag on down black ra4 in punch away it b7 in flurry estimate rb4 and contra-flow c4! An exquisite in-between b4 check d4 took me a while time to see in luft jaffer <Bxc4 Nxc2+ Kc5 Nxb4 Kxb4> <Rxc4 b8> Black is on netting end aka rook or bxc4 lend me it your ear b7 chuckle promote in b8 alphabet soup crazy ne6 in source direct it? Go back good alternative next we edge rookb7 us right dig rookc6 ridge off the camel king stuck in d4 e5. Will a5 go sit up a6 the nb4 ordain forked all bar in gift abpawns decide the day I shall cherish it a while for beauty eye of the beholder. In ar good difficult it start with pave b6 and end in chekov lance time elucidate in clock b6 Criminal Justice Radjabov hell bent it seem. |
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| Mar-09-12 | | bachbeet: I didn't see it but it sure is a nice continuation and ending. |
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| Mar-09-12 | | Memethecat: <scormus: <Memethecat> No problem at all! Of course I couldn't imagine you were serious ;) <62 Rc4+> Thanks, I can tell you I got quite buzz when at last I saw it. > Glad to hear it. Keep up the good work. |
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| Mar-09-12 | | Once: <Oxspawn> I'm intrigued by your handle. I see three possible explanations - all of them almost certainly wrong. First it could be "Ox's pawn", as in the pawn belonging to the Ox. The Ox might be you, perhaps suggesting that you are packing some element of the physique of an Ox. If so, I am deeply jealous. Or it might refer to some other Ox. Perhaps ox is the nickname of the white queen rook? Or it could be "Ox spawn" as in the somewhat scary and demonic babies of the Ox. This might even make a suitable name for a horror film or a deth rock metal group. Their first album might even be called "Devil's calves" or "Hell's hamburgers" Then again it is possible that you are referring to the fabled game of hyperchess. Rumoured to have been invented by Capablanca, but kept hidden in Area 51 by the American government who are afraid that it is just too darned complicated and would fry our poor mortal brains. Rumour has it that the instructions for hyperchess are stored in an unmarked wooden crate in an immense hangar. Turn left past the one with the crystal skulls and right past the ark of the covenant and ... you get the picture. Hyperchess is played on a board that is 20x20. To fill in the extra spaces on the back, both players get a range of new pieces. My personal favourite is the oberleutenant, which moves a little like a knight with hiccups. Only one game of hyperchess has ever been played, and that was under strict laboratory conditions. Even so, both players soon went mad after the game. The Government hushed it up, of course. Claimed it was a weather balloon or something like that. Whisper it quietly, in case the men in black are listening in, but I hear that the last move played in this game was when white reached over to his oberleutenant and used it to capture his opponent's king's knight pawn. Or in modern notation: O x s pawn. |
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Mar-09-12
 | | Penguincw: I can not believe that I saw the game about a week ago and still didn't get it. :( |
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| Mar-09-12 | | morfishine: <gofer> I really enjoyed your analysis, very nice! |
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| Mar-09-12 | | supergeckoh: I didn't get this puzzle. I was looking at 60.♖xd3 which I think also wins.
But of course the line played in the game was better. |
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| Mar-09-12 | | Quentinc: A fascinating miss. Because it's a puzzle, I "knew" the answer was b6 and b7, and that the key would involve a fork on c2 preventing the Black rook from stopping the pawn on the b file. And, STILL, I couldn't get it! I even tried starting with Rc4+. |
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| Mar-09-12 | | agb2002: White has a knight and a pawn for a bishop.
Black threatens 60... Kxc3.
The advanced pawn suggests 60.b6:
A) 60... Kxc3 61.bxa7 + -.
B) 60... Rxa4 61.b7 Rb4 62.Rc4+ Bxc4 63.Nc2+ Kc5 64.Nxb4 and 65.b8=Q. C) 60... Ra5 61.b7 + -.
D) 60... Ra6 61.b7 Rb6 62.Rc7 f5 63.a5 Rb2 64.Kg2 with the threat Rd5+, Nd5 and Nb6. E) 60... Ra8 61.Rc7 f5 (61... Rxa4 62.b7 as in B) 62.Ra7 Rb8 63.a5 Kc5 64.a6 Kb6 65.Ra8 Kc7 66.a7 Rxb7 67.Rc8+, etc. F) 60... Rb7 61.Rc6 followed by a5 and Rc7, looks similar to E. |
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| Mar-09-12 | | galdur: I doubt that Karjakin missed Rc4. After b6 he has a totally lost game (which was lost anyway a few moves earlier) and he fell on his sword with Rxa4 so to speak. |
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Mar-09-12
 | | gawain: 62 Rc4+ is marvelous. I did not see it.
I'm glad some people have looked at what happens after 60 ...Rb7. This troubled me. |
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| Mar-09-12 | | gofer: <Once: <Oxspawn> I'm intrigued by your handle.> <Once>: I think <Oxspawn> made a reference at some point to swimming at Oxford Uni. Maybe he is making reference to being the offspring of that university. Like <Oxbridge> is the combo of both Uni's... |
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| Mar-09-12 | | M.Hassan: <sevenseaman:"I've played his games and seen many a brilliancy. He should be among the top few" (Referring to Rajabov)> He is.
In the latest Newsletter, dated March, 2012 of my chess club named Scarborough Community of Toronto Chess news and Views, Rajabov is ranked 5th as far as FIDE rating is concerned after Carlson, Aronian, Kramnik and Anand |
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| Mar-09-12 | | parmetd: I didn't get to do the problem because I remember watching it live from earlier this year... |
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| Mar-09-12 | | James Bowman: Lol very nice very nice. I saw 60.b6 almost immediately but the tactical exchange resulting in the fork causing the loss of rook needed to stop the queening pawn was very clever. Bravo Radjabov bravo! |
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| Mar-09-12 | | tlukechess: This line is amazing. If the rook gets forked, the knight will end up on b4. Black cannot stop promotion once the knight reaches this square as it preventing blacks light-squared bishop from moving to a6 or d5 to attack the passed pawn. |
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| Mar-09-12 | | efvaatn: I didn't see Rc4!!!!! |
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| Mar-09-12 | | ajax333221: this is the best puzzle I have seen in a while!
my definition of 'best' = interesting/fun/puzzling/and other hidden factors I don't want to share because no one cares |
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| Mar-09-12 | | Everett: Long live endgame tactics! |
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| Mar-10-12 | | sevenseaman: < ajax333221: this is the best puzzle I have seen in a while! my definition of 'best' = interesting/fun/puzzling/and other hidden factors I don't want to share because no one cares> .You'll be surprised some of us may do. |
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| Mar-10-12 | | dufferps: After black's blunder, 60. ... Rxa4, the win for white was quite straightforward. The hardest part of the continuation (for me) was working the proper Queen and King mating sequence without letting black get a stalemate -- rather standard procedure, but poor player that I am, I would probably do better to promote another pawn and use two queens (still having care to avoid stalemate) But the real challenge, one that I could not solve, was finding if white could force a win if black played
60. ... Rb7. Is there any authoritative answer to that? I have seen some kibitzes about it, and I have tried a few lines with it, but have seen no convincing decisive win moves for either player. |
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| Mar-10-12 | | dufferps: <doubledrooks> wrote: I reached a won position against Crafty after the following: 60. b6 Rb7 61. Rc6 Be2 62. a5 Rd7 63. Nc2+ Ke5 64. Nb4 e3 65. fe Bf3 66. Rc1 Rd2+ 67. Kg1 Kf6 68. a6 Rg2+ 69. Kf1 Rb2 70. Rc4 Be2+ 71. Ke1 Bxc4 72. a7 Rb1+ 73. Kd2 Ra1 74. b7 Rxa7 75. b8=Q
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Perhaps this answers my call for an authoritative answer to how either player could have forced a win after 60. ... Rb7. However, Crafty played far more aggressively than I would have in this situation, and it did fall apart. I was thinking that black would respond 61. ... Ba6, and after
62. a5, the outcome of the game would depend on movement of the Kings and the king-side pawns. I just can't convince myslef that white could force a win. |
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| Mar-10-12 | | David2009: <morfishine: <gofer> I really enjoyed your analysis, very nice!>
click for larger view
I agree - <doubledrooks> and <gofer> have produced real masterclasses in the "strategic tactical" win starting 60.b6 Rb7! 61.Rc6 (link Radjabov vs Karjakin, 2012) and in the "strategic first principles" win starting 60.b6 Rb7 61.Rb3 (link Radjabov vs Karjakin, 2012. The alternative plan of sacrificing the passed Pawns to activate the White King and win on the King side fails (as per my own post Radjabov vs Karjakin, 2012) even though the line successfully swindles the EGT. <dufferps: I just can't convince myslef that white could force a win.> The <gofer> method does seem extremely logical. |
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