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| Apr-11-07 | | MostlyAverageJoe: Very pleasing combination, but I have a feeling that it will be a binary puzzle. Either you got it or you did not come close. Nothing in between. After I wrote the above, I went off to run a quick analysis before posting. Curiously, my chess engine agrees. The two best moves for the white are listed as: 12. Qxd8 (rated at +2.69)
12. Qc4 (rated at -3.35)
So the situation indeed appears to be win-or-lose.
I am ashamed to say, but I spent a good 10 minutes trying to make something useful out of Qc4 before the lightbulb (three of them, actually) went offf :-0-0-0. Very educational. I don't think I'll be ever able to forget this trick. |
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| Apr-11-07 | | MostlyAverageJoe: <thesonicvision: uh....the puzzle should have started at move 11. Nxe5> Nope, the black does not have to take the knight. Just live with one pawn down, and develop some other piece, maybe Be6. |
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| Apr-11-07 | | pastpawn: <Chunkey Monkey>: I think the incident you're thinking of is in this game: Korchnoi vs Karpov, 1974
Korchnoi wasn't sure before his 18th move whether you could castle (kingside, in this case) with an attacked rook, and had to double-check with the arbiter first. |
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| Apr-11-07 | | notyetagm: Wow, I had never seen the 0-0-0+/♔x♖ trick in an actual game until now. |
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| Apr-11-07 | | Bingat29: <thesonicvision> After 11. Nxe5, Black is not compelled to take the Knight, since the pawns and materials are still even. Black simply retreats by 11. ...Rb1. White may continue to put more pressure by 12. Rd1 but the reply 12....Be3 will force the Knight to retreat giving Black the tempo. So maybe the game is far from over. Hence, in my humble opinion, it will not be a good puzzle to start witn 11. Nxe5 as the key move. |
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| Apr-11-07 | | mig55: <Korchnoi checked with arbiter O' Kelly and all was well. > Horror horrensis.. |
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| Apr-11-07 | | dzechiel: Got this one pretty quickly, but mostly because I have seen this theme in the past. When ever I see someone castle queen side with the rook passing over an attacked square I recall the story of Averbakh objecting to his opponent's queen side castling under similar circumstances. Finally the tournament director had to explain the exact rule to the grand master and he is quoted as saying, "Only the king? Not the rook?" |
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| Apr-11-07 | | dzechiel: This is the game where Averbakh learned a new rule of chess: Averbakh vs Purdy, 1960 |
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| Apr-11-07 | | cuendillar: Not very hard, but quite counter-intuitive. "I'm down a piece, so I exchange queens and win by castling." |
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| Apr-11-07 | | jaykingmusic: It gave me a quick chuckle after I solved it in about 5 seconds. I love what dbquintillion has to say. It's definitely food for thought. This may not be a fair puzzle in snapshot form, because you have to assume he can castle. You don't know if the king has moved yet, unless you play out the game first. It sort of reminds me of the 3 position repetition rule. Not only does every piece have to be in the same position to claim a draw this way, the pieces must have the same potential. If you could have castled or not have castled or captured en passant, it would not count as one of the 3 repeated positions. Comments? |
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| Apr-11-07 | | truefriends: Maybe this puzzle could have started at move 11 better, or even 10... :) |
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| Apr-11-07 | | Tactic101: I was thinking for a long time about everything I could consider. The rook dangerous position, the king being the only defender of the queen, but nothing worked. I even considered castling kingside. Finally, it dawned on me after a few minutes thought. If I castle queenside and give check with the rook, I can win black's rook. So Qxd8+!, Kxd8, 0-0-0+. Very creative. Chessgames found a fantastic puzzle. Even if it's easy for some, they have to admit it's elegant! |
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| Apr-11-07 | | BabalooMoon: <jaykingmusic: I love what dbquintillion has to say. It's definitely food for thought> I think dbquintillion makes some interesting arguments but I'm not sure that I agree with them. The white queenside castle here is only "an unanswerable offesive blow" because black has made it so. First by being a bit greedy with 9...Rxb2 and then foolish with 11...dxe5. I do have some sympathy with black though as I'm sure I would have done exactly the same thing. Fantastic puzzle! |
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| Apr-11-07 | | Captain Scarlet: This is too easy to be a Monday puzzle, never mind a Wednesday one! |
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| Apr-11-07 | | mr j: Glad I got this,
Great to see your opponent resign just after castleing your king :) |
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| Apr-11-07 | | gambitfan: I saw at once the combination 12 ♕xd8+ ♔xd8 13 0-0-0 ... but then I was searching in vain for a quick mating... In fact gaining the rook is sufficient for the gain... |
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| Apr-11-07 | | somitra: Here is another great game by Vishy ending in casling! :
Anand vs Svidler, 1999
<MorphyMatt> may want to add it in his collection. |
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| Apr-11-07 | | TommyC: This one took me about a minute - so I found it tough for a Wednesday :) |
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| Apr-11-07 | | Marmot PFL: Took me 10 sec - twice as long as yesterday. Always seem to slow down as the week drags on. |
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| Apr-11-07 | | Marmot PFL: I wonder if they have the colors right on this game. O'Kelly was a very strong player and I doubt he would lose to an unknown in 12 moves. |
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| Apr-11-07 | | JohnBoy: I agree with <true> - the puzzle makes sense if one sees that white's preceding move was Nxe5. That's where things should start. |
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| Apr-11-07 | | uuft: (dbq)/Clearly castling is not designed to be an offensive maneuver./ Why not? Castling has two goals: it gains time in developing the rook, and it gets the king 'safe'. I really would not call castling a defensive maneuver, moreover considering 'all' the games lost due to castling at the wrong time. |
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| Apr-11-07 | | psmith: Very easy for Wednesday, it seems to me. |
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| Apr-11-07 | | tbentley: After 11. Nxe5, Crafty gives white a 1.00 advantage; after 11...dxe5?, Crafty gives white a 3.01 advantage. I'm surprised there's that much of a positional advantage, but nevertheless starting at move 11 doesn't give white a decisive advantage. |
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| Apr-11-07 | | WarmasterKron: Ah, this old chestnut. I was confused for a while, then the penny dropped. |
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