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| May-30-10 | | patzer2: The puzzle given by <Once> is move 92...? for Black at C Pilnick vs Reshevsky, 1942, where the game ended with the amusing swindle 92...g4?? 93. Qf2! = draw. |
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| May-30-10 | | whiteshark: What a relief! |
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| May-30-10 | | awfulhangover: Insanely easy for a Sunday. |
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| May-30-10 | | patzer2: Carl Pilnick - Samuel Reshevsky, New York ch-USA 1942
click for larger viewAnalysis by Fritz 10:
1.  (-7.68): 92...Qc1+ 93.Kg2 Qf4 94.Qc5+ Kb8 95.Qd5 Qg3+ 96.Kh1 Qh3+ 97.Kg1 Qe3+ 98.Kh2 Ka7 99.Qd8 2. (-7.68): 92...Qe1+ 93.Kg2 Qd2+ 94.Kh1 Qc1+ 95.Kg2 Qf4 96.Qc5+ Kb8 97.Qd5 Qg3+ 98.Kh1 Qh3+ 99.Kg1 Qe3+ 100.Kh2 Ka7 101.Qd8 g4 102.Qxh4 Qh3+ 103.Qxh3 3. (-7.68): 92...Qa3 93.Qf2+ Kb8 94.Qh2+ Ka8 95.Qd2 Qa1+ 96.Kh2 Qf6 97.Qd5 Qf2+ 98.Kh1 Qe1+ 99.Kg2 Qg3+ 4. (-6.98): 92...Qe7 93.Kg2 Kb8 94.Kf2 Qd8 95.Ke2 Qe8+ 96.Kd2 Qb5 97.Qf8+ Kc7 98.Kc2 Qe2+ 99.Kb3 Qe3+ 100.Ka2 5. (-6.82): 92...Kb8 93.Qf8+ Kc7 94.Qf7+ Kc6 95.Qg6+ Kd5 96.Qf7+ Kd4 97.Qd7+ Kc3 98.Qc8+ Kd3 99.Qg8 Kd4 100.Qc8 Qf3+ 101.Kg1 g4 102.Qd8+ Kc5 103.Qxh4 Qe3+ 104.Kh2 Qh3+ 6. (-6.81): 92...Qc3 93.Qf2+ Kb8 94.Qf8+ Qc8 95.Qd6+ Ka8 96.Qe7 b6 97.Qf6 bxa5 98.Kg1 7. (-4.66): 92...Qb3 93.Qc5+ Kb8 94.Qe5+ Kc8 95.Qe8+ Kc7 96.Qe7+ Kc6 8. (-3.68): 92...Qe8 93.Qxg5 Qe1+ 94.Kg2 Qg3+ 95.Qxg3 hxg3 96.Kxg3 Kb8 97.Kf4 Kc7 98.Ke4 Kc6 99.Kd3 Kb5 100.Kc3 Kxa5 101.Kb3 b5 102.Ka3 <Once> Although not initially listed among the eight winning moves by Fritz, it would seem 92...Qf4! 93. Qd5 g4 94. Qc5+ Kb8 offers a ninth winning solution. |
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| May-30-10 | | zb2cr: This is the first time I have gone 7 for 7 in a week. I am not interested in any of the site's kibitzers saying, "big deal, the puzzles this week were all WAY TOO EASY." Too easy or not, it's the first time that I, an average rated player, have done it. I intend to enjoy this modest achievement. |
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| May-30-10 | | Once: The fun comes when you look for all the drawing moves. If black is careless he can throw away the win quite easily from here:
click for larger view92...h3 and 92...g4 draw to 93. Qf2, pinning the queen and forcing the exhange. 92...Qe2 and 92...Qd4 draw to the same 93. Qf2 trick. 92...b6 and 92...b5 draw to 93. Qd7+ and the black king cannot evade perpetual check. But my favourite is 92...Qg3 93. Qf2+, which gets us to here: 
click for larger view93...Qxf2 is a stalemate draw.
93...Ka8 94. Qa7! Kxa7 draw
93...b6 94. Qxb6+ Ka8 95. Qa7+ Kxa7 draw.
93...Kb8 94. Qxa7+ or 94. Qf8+ and white will offer his queen repeatedly until black gets bored and agrees the draw. <patzer2> You're right about the ninth winning move. My version of Fritz was calling it 0.00 because it was a repeat of a previous position. Our well known software bug, I'm afraid. |
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| May-30-10 | | johnlspouge: Sunday (Insane)
Portisch vs L Lengyel, 1964 (52..?) Black to play and win.
Material: Down 2P. The Black Kh8 is stalemated, so Black can draw if he can give away his Qd7 without perturbing the White Qg6. Candidates (52...): Qg4+
52…Qg4+ 53.Kf6 [Kh6 Qh4+ 54.Qh5 Qf6+ 55.Qg6 Qh4+, with repetition] 53…Qe6+ 53.Kg5 Qg4+, with repetition
Captures are of course a stalemate. |
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| May-30-10 | | vanytchouck: there must be a mistake !!!
This can be any sunday puzzle!
Who can't help seeing Qg4 + at once ? |
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| May-30-10 | | TheaN: Just for the randomness of it I would like to elaborate on the FIDE rule stating <any forced sequence leading to stalemate or mate is respectively a draw or win>. Here, it's obvious what that means: Qg5† is instantly 1/2, as any capture by White is a draw, and they are his only legal moves. However, consider:
click for larger viewIf Black decides to play the desperate move 1....Rd1†, it's in fact 1....Rd1† 1-0! 2.Bf1‡ is forced, even if White did not see this 1....Rd1† wins on the spot for White according to the above mentioned rule. Of course, White can only claim this rule if he sees it's forced mate, but officially Bf1 may NOT be played, how weird it is. I think there are some other weird situations to make up, but this just got into my mind quickly :). |
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| May-30-10 | | acirce: <TheaN> Where did you get the idea that there is such a rule? When it comes to mate, that is. |
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| May-30-10 | | sfm: Ooops!52.f4??
Instead 52.Qf6+,Kg8 53.f4 wins instantly. All moves with the black queen to e,f,g,and h-files forces at least queen-swapping, like e.g. 53.-,Qh3 54.Qg6+
On 53.-,Qb7 54.f5 it is just over, the pawns in the center stopping the usual annoying diagonal counter-checks from behind, and supports queen-exchanges with checks from e5. |
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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." 
click for larger viewIf 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. I think.... |
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| 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. |
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| May-30-10 | | Confuse: I did it! A sunday puzzle!!!!
:( |
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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. |
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| May-30-10 | | acgneves: As I commented yesyerday... this was the week of desperato puzzles (then, predictable), booring and much easier than common! |
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| 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+! |
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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. |
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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. |
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| 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. |
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| 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. |
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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>. |
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| 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. |
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| 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 :). |
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| 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. |
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