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| Posted by aixrad nsa-hitachi.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 nsa-hitachi.com 9/05/2008 05:49:19 Play online chess | Message: | ||||||||||||||||||||||||
| Posted by aixrad nsa-hitachi.com 9/05/2008 06:36:33 Play online chess | Message: Then I wa very stupd and blind at that moment ——— It's All in the Programming: Computer Falls to a Beginner — It has been commonly accepted for about a decade that computers are better than people at chess. But a couple of weeks ago, a widely circulated story out of Ukraine suggested that a man who learned to play the game less than a year ago had beaten the world’s best chess program. The story seemed preposterous. The man, Andriy Slyusarchuk, beat Rybka 4, the strongest commercially available chess program, in a two-game match, winning one and drawing the other. He not only won, he played what is known as blindfold chess, meaning he called out his moves and had the computer’s relayed to him. The match was taped in front of an audience and broadcast on television. Slyusarchuk, 39, claims ... Posted by chessnovice | nsa-hitachi.com 9/05/2008 21:39:08 Play online chess put a positive spin on itMessage: ——— U.S. chess championship felt like a tornado — I wasn’t at the airport last month, but I still feel like I got hit by a tornado. For some players, the 2011 U.S. Chess Championship concluded April 29, but unfortunately April 21 was my last game. On the bright side, I had a ringside seat for the remainder of the chess matches, including the heart-pounding women’s finals, which went into an Armageddon round (that’s triple overtime)! The chess tournament featured an interesting format – the top two players from two eight-player round-robin groups qualified for the semi-final matches. The two semi-finalists from the “A” group were no surprise. Reigning Chess Champion and Grandmaster (GM) Gata Kamsky and last year’s runner-up, GM Yury Shulman, easily ... Posted by ionadowman | nsa-hitachi.com 9/07/2008 13:55:23 Play online chess Incidentally...Message: Bad luck, Ion ——— Chess notes — China is steadily gaining the respect of the world chess community as some of its players have emerged to become substantially dangerous competitors in the West. So the Chinese chess championships have been watched with interest this year. In the 2011 championship, a dark horse has once again emerged to take first place: Ding Liren. The 18-year-old won the title in 2009 (in part because of a defaulted game), despite being one of the lower-rated chess players in the field. His score this year was a startling 9-2 against such well-known chess grandmasters as Yue Wang and Xiangzhi Bu. Ding has only occasionally played in the West. World Women’s chess champion Hou Yifan scored an impressive ... Posted by wuzzie | nsa-hitachi.com 9/11/2008 04:13:47 Play online chess not checkmateMessage: ——— Chess: A pawn endgame dilemma — Should White force a pawn endgame? It's a tricky decision... RB: My first reaction is: no, White should definitely not exchange. After 1 Nf4 Bxf4 2 Kxf4 Kd5 it seems to me as though Black is definitely better. But what else does White have? I don't want to drop the king back and allow the black king to invade. I could try 1 a4, but after 1…b6 I'm back to my original dilemma. It makes me nervous, but let's see what happens after 1 Nf4. Black takes, obviously, 1…Bxf4 2 Kxf4 Kd5. Now what? As long as ... Posted by lighttotheright | nsa-hitachi.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. ——— For Want of a Draw, a Player Loses the U.S. Chess Title — Yury Shulman forgot the old saying that a tie is better than a loss during his quest to win the United States Chess Championship last week. And that opened the door for Gata Kamsky to capture his second straight title. Kamsky and Shulman met in the tournament final, as they did last year, when four competitors competed in round robin play. Kamsky and Shulman emerged as the top scorers of that round and met in an Armageddon game, in which White has more time but Black only has to draw to be declared the winner. No Armageddon was needed at this year’s final, which ended Wednesday in St. Louis, because Kamsky won the first game and the second was drawn. The first game would ... Posted by heinzkat | nsa-hitachi.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 | nsa-hitachi.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 | nsa-hitachi.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 | nsa-hitachi.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 | nsa-hitachi.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 | nsa-hitachi.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 | nsa-hitachi.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 | nsa-hitachi.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! |