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Posted by ganstaman beck-web.com 5/04/2008 08:11:43 Play online chess	Subject: Puzzle 283 Message: Ok, the puzzle on the homepage at the time of me writing this (search for puzzle number 283 here: gameknot.com ) White to move, mate in 4. I won't spoil the solution given, as it is brilliant seeming to me. But how can black spoil white's plan of Qh4-(h or e)7-b7#? I can see black delaying the journey by 1 move, so it would be mate in 4. What did I miss, if anything?
Posted by heinzkat beck-web.com 5/04/2008 08:21:53 Play online chess	I think the answer is Message: 1. Qh4 Rh1!
Posted by sf115 beck-web.com 5/04/2008 08:35:09 Play online chess	Message: If 1. Qh4 Rh1 white either: 2. Qxh1 a1=Q 3. Qh7 Qxa6+ 4. bxa6 b1=Q 5. Qb7++ which is a move slower than the actual solution. OR 2. continue with the original plan with 2. Qe7 Rh8+ 3. Nd8 Rh7 (3...Rxd8 also slows down whites mate) 4. Qb7+ Rxb7 5. axb7++ which is also in 5 moves. So there is only a mate in 5, which is slower than the actual solution ——— Armenia replaces England as nation that punches above its weight — In the 1980s and 1990s England punched above their weight in world chess events. Silver medals in the Chess Olympiads of 1984, 1986 and 1988 and bronze at the 1985 and 1989 world teams were followed by gold at the 1997 Euroteams. After that the England chess team aged or retired, while competition increased with the break-up of the Soviet Union. There have been hopes in the past two years that a new England chess group could become international contenders, as Luke McShane, David Howell and Gawain Jones became strong chess grandmasters to support the established stars Michael Adams and Nigel Short. But recently McShane has reverted to a full-time job and is not competing in ...
Posted by ganstaman beck-web.com 5/04/2008 09:50:31 Play online chess	Message: Ah, that seems to do it. Thanks. ——— Chess-mad Armenia's heroes return in triumph — Armenia's top chess players, lauded as heroes after winning the 2011 World Team Chess Championship this week, vowed on Friday to boost the small chess-mad country's status in the game even further. The team's head coach said that future successes will be secured through official support and an unusual new scheme to promote the game among schoolchildren initiated by Armenian President Serzh Sarkisian, a keen chess player who also heads the country's Chess Federation. "Because of this attention and care, we can improve our game," coach Arshak Petrosian told a press conference, two days after returning from the chess tournament in China to a rapturous welcome from fans and ...
Posted by lighttotheright beck-web.com 5/05/2008 03:53:48 Play online chess	Message: There is an alternate solution that is not accounted for by this puzzle. This kind of thing irritates me. It turns out that my first choice was in fact correct, but the puzzle said I made a mistake. Once you know the solution, it is easy to see that my alternate path works because mine is based on the same principles that are used in the given one. It's still mate in four, but why are alternate solutions unaccounted for? I thought that problem was fixed long ago. ——— U.S. doesn't medal in China — During a long and grueling chess tournament here in Ningbo, China, the U.S. team had real chances to capture a medal at the World Team Championship. But the competition proved too fierce, and we had to settle for tie for fourth place with 10 total points. However, after the complex tiebreak system, the U.S. ended up in sixth place, which is slightly better than our original seventh-place seeding. Still, it was a bit disappointing, as we squandered some golden opportunities. In a normal chess tournament, an individual receives one point for a win and a half point for a draw. The same was true for this event, but individual results were tallied up after each round and then teams were awarded points based ...
Posted by heinzkat beck-web.com 5/05/2008 04:22:15 Play online chess	That problem was fixed long ago Message: Lighttotheright, I think you're wrong here though - puzzle 283 has only one solution (for mate in four). ——— Long Live the Chess King — Chess sometimes becomes a beautiful game even in the eyes of those who don't play it. Find a charming town, bring back its glorious past, turn people into chess pieces, invite kids and a jester and you can evoke magical moments. Every year since 2005, the picturesque Slovak town of Banska Stiavnica stages a game of living chess. It is a powerful, almost mystical, spectacle with human chess pieces dressed into medieval costumes and armed with spears and swords. They are moving on a big chessboard to the sound of drums and trumpets. On Saturday, July 16, they were recreating a live blindfold game I was playing against the legendary Hungarian grandmaster Lajos Portisch. The top-rated ...
Posted by lighttotheright beck-web.com 5/05/2008 04:33:40 Play online chess	Message: The alternate 1. Nd8 works and is confirmed. It is mate in four just like the given solution. ——— Chess: Advance of the rook — We continue our examination of chess games by the master of positional play Ulf Andersson. Here he has built up a dominating position, principally by controlling the only open file. But a breakthrough is still needed: over to Ronan. RB: Everything points to an immediate 1 Rd6 – White's doubled rooks on the d-file, the pawn on e5 and the difficult position of the black knight on c6. But it does involve an exchange sacrifice and I have what must qualify as a near-phobia about giving up rooks for minor pieces. Still, if ever there was a time to get over my fears this surely has to be it. After 1…Bxd6 White could recapture with the rook, 2 Rxd6 but this doesn't seem to ...
Posted by lighttotheright beck-web.com 5/05/2008 04:38:41 Play online chess	Message: Heinzkat -- I'm not wrong. 1. Nd8 does work. The problem is that no computer can solve this particular problem from four moves out. The computer checking the solutions is wrong. Once you input the solution, the computer suddenly sees the solution at 2 or 3 moves out depending upon the program that you use. This particular puzzle is an anti-computer one.
Posted by heinzkat beck-web.com 5/05/2008 04:47:30 Play online chess	Lighttotheright! Message: This is the interesting part of the puzzle, which is not covered in puzzle #283, since the puzzle application didn't support underpromotions of the opposite side back then. After 1. Nd8? [if I may boldly give it a ?] c2 2. Qc1 b1=B! Black is stalemated and there can be no mate in four. After 1. Nb4 however, 1. ... c2 2. Qc1 b1=B 3. Nd3! exd3 4. Qh1, it IS mate in four :-)
Posted by chessnovice beck-web.com 5/05/2008 04:48:12 Play online chess	... Message: Sometimes puzzle makers don't have solutions entered entirely. Human error is prone to omissions. If you find an alternate solution, you're able to enter it. Nothing to necessarily get irritated about, I think.
Posted by heinzkat beck-web.com 5/05/2008 04:55:26 Play online chess	Also... Message: Remember GameKnot does no checking of the puzzle at all - the puzzle application merely checks if all variations end in checkmate. If so, the puzzle is 'approved' 'correct' (twice '', ah well) an can be put up for others to solve. As you can see on the puzzle page, a lot of the puzzles still have some hiatuses then. If you think 1. Nd8 mates in four too, 'prove it'! You can do so by browsing to puzzle #283, hover over 'Options' in the right corner and click 'Alt. solution...'. This will give you the option to prove there is another way to play, that results in mate in at most the same number of moves as the original author. If all variations are correct, you can save the puzzle too, and the puzzle has been 'improved'.
Posted by lighttotheright beck-web.com 5/05/2008 04:58:36 Play online chess	Message: 1. Nd8 c2 2. Qc1 b1=B 3. Nd5 Qb2 (or any move) 4. Nc7# It is forced checkmate. There is no stalemate with my solution. The alternate is confirmed, and not seen by computer at four moves out.
Posted by lighttotheright beck-web.com 5/05/2008 05:00:17 Play online chess	Message: 1. Nd8 c2 2. Qc1 b1=B 3. Nd5 Bb2 (or any move) 4. Nc7# Sorry I made a slight error in copying the line. This is correct.
Posted by heinzkat beck-web.com 5/05/2008 05:01:19 Play online chess	2. ... b1=B! Message: Not 2. ... b1=Q. Please re-evaluate your assessments. :-) (note that I hadn't noticed the b1=B solution either. A nice brilliancy by Ado Kraemer)
Posted by heinzkat beck-web.com 5/05/2008 05:02:30 Play online chess	Lighttotheright Message: 3. ... Bb2 is not possible in the intended line! It's 2. ... b1=B, not 2. ... bxc1=B.
Posted by lighttotheright beck-web.com 5/05/2008 05:03:18 Play online chess	Message: I did it again. 1. Nd8 c2 2. Qc1 b1=B 3. Ne6 Bb2 (or any move) 4. Nc7# Those knight moves can get confusing. I think this is correct now.
Posted by lighttotheright beck-web.com 5/05/2008 05:06:00 Play online chess	Message: Heinskat look at the position. The key to the solutiion is the knight path. The Queen sac is to block any defence by black. The solution is very simple. 1. Nb4 and 1. Nd8 both work.
Posted by heinzkat beck-web.com 5/05/2008 05:06:23 Play online chess	Note that in your line... Message: 3. ... Bb2 is illegal. In fact, after 3. Ne6, all Black's moves are illegal - it is stalemate!
Posted by heinzkat beck-web.com 5/05/2008 05:09:59 Play online chess	OK... with a diagram then... Message: After 1. Nd8 c2 2. Qc1 b1=B 3. Ne6 It is Black to move. Do you see any legal ones? Interesting how Ado Kraemer can still keep us busy with his brilliant problems, 36 years after he died.
Posted by lighttotheright beck-web.com 5/05/2008 05:14:36 Play online chess	Message: OK heinzkat. You threw me for a loop with b1. I was thinking about the c1 square. But even with b1=B, it is still checkmate in four. 1. Nd8 b1=b 2. Qxc3 and my solution still works.
Posted by heinzkat beck-web.com 5/05/2008 05:21:11 Play online chess	Well... Message: 1. Nd8 c2 2. Qc1 b1=B is the line that makes mate in four impossible. 1. Nd8 b1=B like you give in this last post, perfectly mates in four - but there's a difference. Carefully check the notations right from the beginning of this thread, I think I haven't messed up any of them...
Posted by lighttotheright beck-web.com 5/05/2008 05:21:54 Play online chess	Message: OK...It is still not stalemate. But it would be a mate in 5 instead. 1. Nd8 c2 2. Qc1 b1=B 3. Qxc2 and it is not stalemate. ...but it does take an extra turn to get the knight to c7.
Posted by lighttotheright beck-web.com 5/05/2008 05:24:17 Play online chess	Message: Sorry for some of the copy mistakes. My copy function on my computer is not working. I have to reboot my whole computer to correct the problem.
Posted by heinzkat beck-web.com 5/05/2008 05:24:20 Play online chess	Exactly... Message: And therefore, 1. Nd8 is an incorrect try. Mate in five is possible in many ways - there is only one correct starting move to mate in four.
Posted by lighttotheright beck-web.com 5/05/2008 05:58:50 Play online chess	Message: Well, it looked correct to me at the time. And my computer was not cooperating with me either!
Posted by chessnovice beck-web.com 5/06/2008 13:55:37 Play online chess	... Message: b1=B is pretty clever! Indeed, prolongs the Nd8 line by one move. I wouldn't worry about not considering that though, since I doubt that very many people really would.
Posted by bogg beck-web.com 5/06/2008 15:13:15 Play online chess	In case anyone else has the ... Message: same problem that I had. The reason that 2. ... b1=B doesn't cook 1.Nb4 and does cook 1. Nd4 and 1. Nd8 is because after 1.Nd4 White has 3. Nd3 ed: 4. Qh1++. Took me a while to see the tree within the forest. CTC
Posted by heinzkat beck-web.com 5/07/2008 01:30:09 Play online chess	chessnovice Message: Obviously the composer did consider it :) bogg: indeed, see my post above too, 5/05/2008 04:47:30
Posted by chessnovice beck-web.com 5/07/2008 01:44:28 Play online chess	hienzkat Message: True. But if you can't trust the composer, who can you trust?
Posted by bogg beck-web.com 5/07/2008 06:35:06 Play online chess	heinzkat Message: Missed that post. Would have saved me some time had I noticed it. CTC