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| Posted by aixrad cpworcester.com 9/05/2008 05:18:31 Play online chess |  Subject: Checkmate or notMessage: I recently played with black this game  game with pianofred.
In this Position I generated the conditional move 20 Rf2 Re1+ ... with threefold repetition to save the draw because I had less material. pianofred mean I maybe could checkmate him forces but we both don't know how. Is this a forced checkmate position? Was it right to save the draw with threefold repetition? Greetings Ralf | ||||||||||||||||||||||||
| Posted by beefturnmail cpworcester.com 9/05/2008 05:49:19 Play online chess | Message: | ||||||||||||||||||||||||
| Posted by aixrad cpworcester.com 9/05/2008 06:36:33 Play online chess | Message: Then I wa very stupd and blind at that moment ——— Ugandan girl, Phiona Mutesi leads chess revolution from the slums — Despite background the 15-year-old girl is already country's number two chess player and has competed at World Chess Olympiad. In a rickety church in a Ugandan slum, a girl's hand thrusts forward and a black bishop falls. The girl shows no emotion, though she knows the end is near. Striking quickly, silently, the black queen is toppled, and then the king. Only then does she smile. "You attacked too much," she tells the boy sitting opposite her on the wooden bench, a homemade board between them. Phiona Mutesi is 15. She has just finished primary school and is still learning to read. Her family is so poor they have been evicted from tiny, rented shacks more times than she ... Posted by chessnovice | cpworcester.com 9/05/2008 21:39:08 Play online chess put a positive spin on itMessage: ——— First Came the Machine That Defeated a Chess Champion — Before there was Watson, there was Deep Blue. In 1997, Deep Blue, another computer built by I.B.M., defeated the world chess champion, Garry Kasparov, in a six-game match. At the time, it was considered a stunning achievement and a significant step forward in the field of artificial intelligence. Some people said that a new era would be ushered in, one in which computers would perform many tasks — like air traffic control — that it once seemed only humans could do. That era has not quite materialized. But almost 14 years later, chess programs running on an average desktop computer can play better than Deep Blue, making its victory no longer seem as implausible. And while the research that ... Posted by ionadowman | cpworcester.com 9/07/2008 13:55:23 Play online chess Incidentally...Message: Bad luck, Ion ——— Chess: How to play like a world champion — The latest study of Vishy Anand concentrates on the world chess champion's outstanding strategic judgment. We'd all like to play like a world chess champion. So what's Vishy Anand doing that's so special? Last week we highlighted his depth of calculation, this week we focus on his strategic judgment. RB: I have no idea what to do here. I have no idea if Black is better or worse and I have no idea what Black's plan might be. Is the white queen trappable? It certainly looks locked in, but without a light-squared bishop it's hard to see how to exploit this. Is there anything in 1...Nc5...? No, apart from a lost piece. Opening the a-file with 1...axb4 might be an option, but ... Posted by wuzzie | cpworcester.com 9/11/2008 04:13:47 Play online chess not checkmateMessage: ——— One Coach, Many Young Chess Champions — In the last five years, two Americans have won world youth chess championships: Daniel Naroditsky, who took the under-12 title in 2007, and Steven Zierk, the under-18 champion last year. Both are from Northern California, and at one point or another, they both had the same coach, Michael Aigner. They are not the only chess champions who have been trained by Aigner. Others include Gregory Young, who tied for first in the 2008 United States Junior Championship, and Yian Liou, who tied for first in the United States Cadet Championship (for players under 16) last year. He has also coached Saratoga High School to six straight California chess titles. Aigner, 36, is a master, and ... Posted by lighttotheright | cpworcester.com 9/11/2008 11:59:11 Play online chess Message: Aixrad, you did well to accept a draw in this position. After wuzzie's 20. Qg4+ Qxg4 21. fxg4...Rxb2 22. Nd2 would have left White with a possible decisive advantage. Although Black would have 2 passed pawns, the vertical isolation would have been difficult to defend. White would have opportunities to open his own passed pawns along the King-side once the black h pawn fell. And don't forget that White would still have an extra piece to fight in this position. Black cannot defend everything under best play. ——— Solving Bobby Fischer (book review) — In the summer of 1972, the world’s attention was directed toward Reykjavik, the capital of Iceland, to watch a championship chess match. Called “the Match of the Century,” the contest between the Russian chess champion, Boris Spassky, and the American challenger, Bobby Fischer, attracted that attention because of its cold war implications. But people were also fascinated by the mercurial Fischer — a prototypical genius whose incessant demands and unpredictability were more associated with the behavior of a diva than with what one expects from a master of a demanding game of logic. Fischer won the chess match in brilliant style, setting off a wave of enthusiasm for ... Posted by heinzkat | cpworcester.com 9/11/2008 12:04:46 Play online chess Message: Should Black play 23. ... Re2, taking the draw because of threefold repetition, or should Black play 23. ... Qxf1#/Rxf1#, taking the win because of checkmate. You cannot say that Black did well to take the draw in this position !?!?!??? Posted by lighttotheright | cpworcester.com 9/11/2008 12:18:58 Play online chess Message: It depends upon what position you are talking about. That is the danger of talking about this game or any like it. If you analyse a different position, you can get entirely different conclusions. Posted by tugger | cpworcester.com 9/11/2008 15:27:10 Play online chess Message: For reference, White should have played 20. Qg4+ and he probably wins, forcing the Queens off the board with a pawn advantage (just the one pawn, as b2 is vulnerable to capture from the Rook). Better still would be to develop the Knight as opposed greedily snatching the pawn on move 19. Posted by tugger | cpworcester.com 9/11/2008 15:33:07 Play online chess Message: The position in the first post is not a win for Black, as it is White to move, and he can save with Qg4+. It is only after White plays Rf2 that it becomes a win for Black. But I would still say that a draw for Black after missing a mate in one can not be considered a good result. Posted by lighttotheright | cpworcester.com 9/11/2008 22:11:00 Play online chess Message: Then White made a mistake and Black did not take advantage of it. That's compounding mistakes. Both sides clearly intended the draw by repeating the position shown by aixrad on move 20. It did not matter that the repeating sequence was flawed. Neither player could see that flaw. Aixrad asked about the exact position he displayed in the first post. I merely confirmed wuzzie's analysis of that exact position. This game was a draw by repetition not by an accepted draw on move 20. It lasted longer than that (I knew that all along). The presumptive acceptance of a draw on move 20 was what I commented on...not the mistakes made later. The line of play I gave as example proves what I was talking about. To later criticize me for stating something I didn't is ludicrous. No where did I refute any of the previous analysis given by others that show the forced mates. But those forced mates do not materialize until after White's Rf2. Posted by tugger | cpworcester.com 9/12/2008 08:20:12 Play online chess Message: "Aixrad, you did well to accept a draw in this position." is what i consider ludicrous. it's my opinion that aixrad should be disappointed, not pleased. i don't mean to pan him down, it's intended as constructive critisism. one should never be pleased about missing an easy win. aixrad should be looking to improve his game to the point where he can spot mate in one positions, and that means he should be disappointed when he misses them. this will hopefully drive him forward, trying to ensure he does not feel this disappointment again. i do know what lighttotheright is saying, though. in the position at the very top of this thread, aixrad is worse off positionally and materially. so i understand why he is saying a draw was not bad. perhaps a better way of approaching this problem is to directly answer the questions aixrad asks... "Is this a forced checkmate position?" - Not in this position. "Was it right to save the draw with threefold repetition?" - No, you should've waited to see what White's reply to Re2 was, then analysed the position, instead of putting up conditional moves. Perhaps then you might have found the win. Posted by lighttotheright | cpworcester.com 9/12/2008 11:15:05 Play online chess Message: But I would like to point out that aizrad is only a 1300 level player. We shouldn't expect a 1600 to 1700 level or greater performance out of him. Is a draw the best result? Of course not. But don't forget that a draw is still a good result regardless. Certainly, it is a lot better than a loss. Posted by tugger | cpworcester.com 9/13/2008 07:41:06 Play online chess Message: "But I would like to point out that aizrad is only a 1300 level player. We shouldn't expect a 1600 to 1700 level or greater performance out of him. " before i go on, i stress again it's just my opinion, but i really don't think that spotting that mate is 1600+ standard, in fact i would expect a 1300 player to have no trouble winning after Rf2. this is precisely the reason aixrad should be disappointed. if he's not disappointed, then how can he drive himself on to improve? if instead he shrugs his shoulders and says "well, a draw is a good result here", then i don't see him breaking into the 1600+ class. but maybe that's just the way i approach things. i guess he may see things differently. he may be boosted by the fact he didn't lose, and as such have more confidence. but i know i would be disappointed if i missed that. it's ironic really, as during the threefold repetition, both players took it in turns to blunder away a win! |