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|May-30-10|| ||Once: <TheaN> Not sure about this one!|
FIDE rule 9.6 says this: "The game is drawn when a position is reached from which a checkmate cannot occur by any possible series of legal moves. This immediately ends the game, provided that the move producing this position was legal."
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If my reading of this is correct, this means that 53... Qg5+ is an instant draw. There is no sequence of moves which would allow either side to force a checkmate. So if either black or white ran out of time after this then it wouldn't matter. It would be an instant draw the instant that black released his hand from the queen.
Black would not even have to press his clock to claim the draw. Article 6.7 (the one that says that a move is not completed until the clock is pressed) specifically says that draws under rule 9.6 are excluded from this.
In reality, it may take a little time for both players to realise that it is a dead draw. But as far as the rules are concerned, that's the end of the game.
But I can't see a rule which says that it is an instant win when a position arrives where a mate cannot be avoided. Article 5.1 states that a game is won instantly when a king has been checkmated or the opponent has resigned.
So in your position, after 1...Rd1+, white can (and indeed must) play 2. Bf1#. Then he has won under article 5.1. If his flag falls before he has completed this move, then it would be a draw under rule 6.9, because although white has run out of time, black has no legal moves to win.
As soon as white has moved his bishop to f1 and released his hand, black is mated and the game is won. White does not need to press his clock.
|May-30-10|| ||thegoldenband: Interesting how many people went for perpetual check after 53. Kh6. I glanced at the idea for a couple seconds, said to myself "Hmmm, that looks potentially messy, is there anything better?", and immediately spotted 53...Qg5+.|
I'm not sure whether that reflects well on me, or is just a testament to my laziness/lack of calculating ability! Still, deliberately being "lazy" is actually a good analytic technique, I think: best not to waste energy on something complicated if there's a simpler, better answer you haven't turned up yet.
Reading Pal Benko's columns has taught me to look for stalemate patterns in pretty much every position. I've solved almost every puzzle this week in under ten seconds -- which is more credit to GM Benko than to me, since otherwise I'm a fish.
|May-30-10|| ||Confuse: I did it! A sunday puzzle!!!!
|May-30-10|| ||chrisowen: Portisch rising star garb the deck shipping over board 52.Qg4+ springs to mind. The white king hungry for avoiding stalemate Kh6 we vilify it shortly yet the crackerpot move was f4. Wind up the feat dangling queen again, deep space apocalypse no wishful thinking!! 53.Qg5+ to the nines gaily stitches up, no space come tail the king should cope. Er nic us draw Lajos hinges the rest.|
|May-30-10|| ||acgneves: As I commented yesyerday... this was the week of desperato puzzles (then, predictable), booring and much easier than common!|
|May-30-10|| ||David2009: I found the pair of stalemate-perpetuals 52...Qg4+ 53 Kf6 Qe6+ etc and 52...Qg4+ 53 Kh6 Qh4+ 54 Qh5 Qf6+ etc but missed the spectacular game finish 53 Qg5+!|
|May-30-10|| ||Jimfromprovidence: <chessgames.com>
<This is a bit easy for being so late in the week. The move 53...Qf5!! is very hard to see, but embarassingly, we overlooked the perpetual with 53...Qh4+/Qf6+ which somewhat spoils the problem.
Don't worry, we'll make up for it tomorrow. ;-)>
This is <chessgames> from back on July 24, 2004, admitting that this was an easy puzzle for a Friday; yet they have the audacity to pass if off to us six years later on a Sunday.
The cost of my subscription went up 16% this year. CG has over 553,000 games in their database. I don't expect warmed-over puzzles, ever.
|May-30-10|| ||keypusher: 53...Qg4+ is pretty obvious for a puzzle, even if this wasn't "stalemate week." In a position like this you automatically look for a stalemate if you're Black. 54...Qg5+ is a lovely move, and I didn't see it. But the existence of the simple perpetual check draws beginning with 54.Kh6 Qh4+ or 54.Kf6 Qe6+ rather spoils the puzzle IMO.|
|May-30-10|| ||Marmot PFL: Portisch grinds Lengyel down but gets careless after winning the g pawn. Or maybe he did a favor for another Hungarian.|
|May-30-10|| ||randomsac: I saw a perpetual check on h4 and f6 instead of the awesome Qg5+ but either continuation still holds the draw.|
|May-30-10|| ||keypusher: <This is <chessgames> from back on July 24, 2004, admitting that this was an easy puzzle for a Friday; yet they have the audacity to pass if off to us six years later on a Sunday.>|
So even if I give myself credit for finding the perpetual checks, you're telling me I didn't really solve a Sunday puzzle? :-(
I have sympathy for cg.com trying to come up with 365 interesting puzzles a year, but that was a good find, <jimfromprovidence>.
|May-30-10|| ||gauer: <<SansAtoms1980> ...not quite ready to go home>|
Don't know which is worse: Blackburne vs Winawer, 1892 1/2, when black thinks he gains , , after his accepts a "gift", or I A Horowitz vs M Pavey, 1951 1/2, when black thinks he gains & 2 s after the accepts another gift of ! In both cases, with minimal investment, black's own short-term greed does himself in - failing to account for strategic ideas before mere tactics - since mere material gain fails to convert a point.
|May-30-10|| ||TheaN: <acirce, Once>
I thought someone stated it in the Miles stalemate game. But what you two say (more elaborated by Once) might be true for mate. Think I'm gonna look it up in the near future :).
|May-30-10|| ||TheaN: Indeed, I stand corrected, it's only valid for 9.6, where it states it's a draw when no series of legal moves can lead to checkmate. So such thing is enforced for mate. So it is indeed rule 9.6 that forces White to draw after Qg5†, without having an option to capture the Queen as it's stalemate anyways, and mate can no longer be achieved.|
|May-30-10|| ||acirce: Yup, I've referred to that rule a few times myself. Strictly, there seems to be no logical reason that the same should not be true for mate, or is there?|
One can have fun with this. Here's a simple illustration that I've posted before. It's not my idea, but I've forgotten the source. Let's say a game ends in this position. Who moved last?
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|May-30-10|| ||Once: <acirce> Not a puzzle I've seen before, but I think I've worked it out.|
K versus K is drawn of course, so the last move by either player must have been to take off a rook or queen. It can't have been a knight or a bishop because K v K+N and K v K+B are book draws. And that would have meant that the game would have ended sooner - ie as soon as the previous piece was exchanged to get us into the drawn one bish or one knight ending.
If black had moved last, his move must have been K x Ra8 or K x Qa8. But neither move can happen. If white was foolish enough to drop a rook or queen on a8, it would be an instant draw under rule 9.6. Black would be forced to take the rook or queen (because he had no other legal moves) and therefore there would be no legal way for either play to win. So the penultimate move (Ra8 or Qa8) would have been an instant draw and black would not have had the chance to take on a8.
This means that it is impossible for black to have moved last. It must have been white.
Is that it?
|May-30-10|| ||wals: Picked the wrong insane move.
Rybka 3 1-cpu: 3071mb hash: depth 21:
Appeared an even game with little more than a pawn in value difference
BLACK, down a pawn, blunders,
+2.36 46...Qh6. best Kg8, +1.62.
+4.59 48...Qe8. best gxh5+, +2.36.
WHITE, up two pawns, gives the game away,
=0.00 52.f4. Available,
1. (5.53): 52.Qf6+
2. (5.09): 52.Qh6+ Kg8 53.Qf6 Qb7 54.f4 Qe7 55.Qxe7
3. (4.78): 52.Qh5+ Kg7
4. (4.77): 52.Qf5 Qg7+ 53.Kf4 Qg6 54.Qxd5
5. (4.58): 52.Qb6 Qg7+ 53.Kf5 Qd7+ 54.Qe6 Qh7+ 55.Ke5 Qe4+ 56.Kd6 Qc2 57.f4
|May-30-10|| ||acirce: <Once> Yeah, that is it. He must have captured a queen, a rook or a pawn on c6. Can others come up with other ideas on this theme?|
|May-30-10|| ||wals: Some light relief for the "wannabees".
|May-30-10|| ||LIFE Master AJ: <<<52...Qg4+> and <53...Qe6+.>> (Just back and forth. If the White King ever goes to h6, then ...Qg5!+ draws. Its a famous game, its in one of my tactical databases.)>|
|May-30-10|| ||turbo231: good puzzle|
|May-30-10|| ||MarbleSkull: I don't have a sub, but I agree w/ everyone that this puzzle was unusually weak. |
This was either my first or second Sunday solving, but it had the rush of victory similar to a Monday's.
|May-30-10|| ||Dr. J: Perhaps this would have been a better "Insane" stalemate puzzle: Keres vs Fischer, 1962 72 ? Even Fischer didn't see it coming, and gave it !! in "My 60 Memorable Games" (which may have caused cg.c to reject it as too well known).|
|May-30-10|| ||AnotherNN: No one should complain about the puzzles being too easy this week (they were). CG is just having a lark, and giving the patzers some false sense of competence.|
Any one noticed how if CG had taken the positions from this week's GOTD, most of us would have been taken down a notch? Friday's game with White to play at move 28 and Today's at move 14, would surely have qualified as being "insane".
|May-30-10|| ||tacticalmonster: Just so that Kibitzers here can appreciate how beatiful drawing combination can be, I recommend looking up one of Petrosian`s game back in the 60.
It is a famous game. I forget his opponent. Game hints:|
1) The losing side sacrificed his queen
2) No pawn exchange in the whole game
3) It is an ending Q and N vs Q and N
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