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| Dec-01-05 | | aw1988: <but when it was passed around the office none of us got it.> By the way, apart from e-mails, server problems, etc, what DO you do working there? Do you actually play chess and solve problems? |
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| Dec-01-05 | | atragon: Tresling - Benima saw 5 queens on the board. Here a link where you can find that game:
http://www.rexlen.it/tresling-benim... I don't any other real game. |
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| Dec-01-05 | | monad: <beatgiant: continuation after 59.a6 (rather than 59.Rf4)>
Sorry, I was off for the afternoon.
Thinking on it, maybe Black would not play 59...Qxa6. but 59...Qd7, and then 60.axb Qxb 61.QxQ+ RxQ 62.Nxd5 Rb1 (I presume) 63.Nc3 chasing the Rook and then taking the e4 pawn? Then White moves the other e-pawn up and again. Difficult to predict both sides without an engine. But I can see it as good for White. Second version: If Black DOES take the a6 pawn, things look even better. No?
59...Qxa6 60.Qb8 Bc8 ?possibly 61.Qc7+ Kg8 62.and the white Knight can go marauding again. Somehow I thought moving the a-pawn was Karpov's original plan. I checked in his book:
"Karpov's best games", but surprise, surprise, it isn't in there. :-) |
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| Dec-01-05 | | chessic eric: Proud to say I found Rc7! Initially I was looking at Qf3 in the hope of eventually playing Be3+ and wining the d4 pawn, but I couldn't make that line work. But in trying to get the bishop to e3 I noticed white's weakness on the dark squares, including the fatal one on c1. If anyone is wondering, trading one queen for the bishop and rook doesn't work. For example, if 73.Qe1, then 73...,Qf3! threatens mate on g2, and neither 73.Qf1 (instead of Qe1) nor 74.Qf1 (after Qe1) work due to 74...,Qxf1+ 75.Q(K)xf1,Rc1(+) 76.Qxc1,Bxc1 or 76...,Rxf1. |
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| Dec-01-05 | | chessic eric: just as an aside, 73.Qf2 might save white, but as long as black plays accurately, he wins:
73.Qf2,Rc1+!
74.Qxc1,Qxf2+
75.Kxf2,Bxc1 |
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| Dec-01-05 | | TTLump: IMHO, this should have been switched with yesterday's puzzle. It is only mildly challenging because the first move does not look very decisive at first glance and there is no dramatic forced checkmate here, just a decisive winning of the exchange by forcing the rook/queen trade, resulting in a text-book win by virtue of the exra bishop and pawn, but to my mind this type of position (without the exra queen of course!) is more typical of a real game situation and therefore is more instructive for the developing player. |
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| Dec-01-05 | | malbase: The question the Most Queens.
Note that the Alekhine game was a fake.
So was Sumpter-King, Austria 1965-7 Queens.
Another fake: Van Hall-Krabbe Amsterdam 1963.
6 Queens.
Belov-Prohorov, Chelyabinsk 1991 - a five Queen game.
Mackic-Maksimenko, Yugo. 1994 Also 5 Queens |
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| Dec-01-05 | | jackpawn: I must be blind today. I kept trying to make the 'f' file thing work. With the bishop controlling the c1 square it should have been obvious. I'm a fish (sigh) . . . |
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| Dec-01-05 | | trumbull0042: <Chessgames.com>: More often than not, the solution to the puzzle of the day is one or two moves, and then the game ends in resignation, when for us non-GM's the winning continuation isn't always clear. That is the case for me today, and I was wondering if you could post a short justification (Crafty's line perhaps) for the puzzle's solution when the text doesn't indicate a clear-cut continuation. Thank you. |
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| Dec-01-05 | | NakoSonorense: Thank you, keypusher.
Karpov likes to get into personal battles, 188 games against kasparov and 120 against korchnoi. Thats a lot! |
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| Dec-01-05 | | Guest1825: I first saw Rf7, which seemed to easy for a Thurs puzzle. So then I tried to work out Qf3, but finally settled on 72...e3 which threatens to promote. Actually surprised no one saw that. I'm gonna run it through La Dame Blanche and see what comes up. |
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| Dec-01-05 | | TTLump: Here is one possible continuation, according to ChessMaster: 72. Kg1 Rc7
73. Qbd1 Rc1
74. Qxc1 Bxc1
75. Qf2 Kg6
76. Qxf5+ Kxf5
77. Kf2 e3+
78. Ke2 Ke4
79. Kd1 Kd3
80. Kxc1 e2
81. Kb2 e1=Q
82. Kb3 Qb1+
83. Ka4 Kc4
84. Ka5 Qb5#
0-1
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| Dec-01-05 | | master elite123: anyone want to play chess?
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| Dec-01-05 | | Chopin: <jackpawn>: <I must be blind today. I kept trying to make the 'f' file thing work> Join the club. I must have stared at the f file for 5 minutes to no avail. Finally, when I looked at the solution, I was amazed how easy and straight forward it was. |
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| Dec-01-05 | | TTLump: In the hypothetical continuation, white can't get too greedy by attempting to get more than just the rook for his queen: 72. Kg1 Rc7
73. Qed1 Be3+
74. Kh1 Rc1
75. Qbxc1 Bxc1
76. Qxc1 Qf3+
77. Kg1 Qg2#
or
72. Kg1 Rc7
73. Qed1 Be3+
74. Kh1 Rc1
75. Qdxc1 Qf3#
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Dec-01-05
 | | crafty: 73.  f2  c1+ 74. xc1 xf2+ 75.  xf2  xc1  (eval -16.36; depth 17 ply; 500M nodes) |
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| Dec-01-05 | | alexandrovm: It's incredible how 2 queens isn't enought for at least a draw for white. The problem position is really nice. |
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| Dec-02-05 | | CFC rating: I thought this was a very tough puzzle because it is sometimes hard to see moves which don't win immediately. I didn't even look at ...Rc7 |
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Dec-02-05
 | | pittpanther: Can't black win with Qf3? If white captures then recapture with the rook. The threat of Be3 followed by mate on f1 keeps the white queen tied to the first rank. Then black can eventually walk the e-pawn down and win. Thoughts? (I do note that Rc7 is a much simpler win!) |
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| Dec-02-05 | | TTLump: <pitpanther> no. 72... Qf3 leads to a draw as follows:
72. ... Qf3
73. Qxf3 Rxf3
74. Qb7+ Kh8
75. Qb8+ Kg7
76. Qe5+ Rf6
77. Qe7+ Rf7
78. Qe5+ Kh7
79. Qh5 Rf6
80. Qh4 Rf3
81. Qe7+ Kg6
82. Qe6+ Kh7
83. Qd7+ Kh8
84. Qe8+ Rf8
85. Qe5+ Kh7
86. Qe7+ Kh8
87. Qe5+ Kh7
etc.
White can continue either checking the King or pinning the bishop for ever ... |
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| Dec-02-05 | | TTLump: <pitpanther> I think your intuition about 72... Qf3 was correct after all, but not after 73. Qxf3 Rxf3, but instead, 73. Qxf3 gxf3! and now the immediate threat of mate on f1 is gone, but the more intractable threats of 74... f2+ or 74... f3 loom very large. The question is, can White find a perpetual check before Black queens a pawn? |
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| Dec-02-05 | | TTLump: <pitpanther> To answer my own question, aparently not! Here is a relatively low-ply (7-9) ChessMaster solution of 72... Qf3, 73. Qxf3 gxf3 ..... 74. Qb6 Bg7
75. Qc5 e3
76. Qc2+ Kh6
77. Qc6+ Rf6
78. Qe8 e2
79. Kf2 Rf5
80. Qe3+ Kg6
81. Qe8+ Rf7
82. Qe6+ Bf6
83. Qg4+ Bg5
84. Qe6+ Kg7
85. Qg4 Kf6
86. Ke1 Kg6
87. Qe6+ Kg7
88. Qe5+ Kh7
89. Kf2 Re7
90. Qf5+ Kh6
91. Qb1 Bd2
92. Kxf3 Kg5
93. Qb3 e1=Q
94. Qxd5+ Kg6
95. Qc6+ Re6
96. Qc2+ Kf6
97. Kg4 Re4+
98. Qxe4 Qxe4+
99. Kxh3 Qf3
100. Kh4 Qf5
101. d5 Bg5+
102. Kh5 Qh3#
0-1
It would interesting to see a deeper ply result from this position courtesy of Crafty or Fritz. |
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Dec-02-05
 | | patzer2: The puzzle solution 72...Rc7! allows Korchnoi to decisively exploit Karpov's weakened castled position. After the exchange of Rook and Bishop for a
Queen, Black will have a won game. |
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| Dec-03-05 | | beatgiant: <monad>
<If Black DOES take the a6 pawn, things look even better. No? 59...Qxa6 60.Qb8 Bc8 ?>
But my post suggested 59. a6 Qxa6 60. Qb8 <Qd6>, seemingly guarding all threads while offering the queen trade and threatening ...Rxe3. How does White continue in that case? I don't see anything for White in something like 59. a6 Qxa6 60. Qb8 Qd6 61. Qe8 Rxe3 62. Qh5+ Bh6 63. Qf7+ Kh8 64. Qxb7 Rf3, etc. |
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| Jan-13-06 | | shor: why did korchnoi play the move 71...Qf5?
what was it's purpose |
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