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| From | Message | Posted by alice02
uskidscompute.com
1/03/2004
13:24:53
Play online chess |  Subject: impossible Board positions
Message:
I started off by trying to work out puzzle 366 on Gameknot. Then I posted on the Gameknot section. Then I wondered - if you're experimenting with end games, can you put 2 or more pieces per colour on the board anywhere and any how without the king being in check and try and work it out, or could you accidentally come up with impossible positions. I know it is not the best way to practice endgames, but I'm using the example to ask about the structure of a chess game, not about endgames.
| Posted by tgtp
uskidscompute.com
1/03/2004
14:35:59
Play online chess | one example
Message:
white Qb6, Qc7, Ke1
black h7,g7, Ka8
white to move
what was black´s last move?
Ka7-a8, Kb7-a8 or Kb8-a8
in all three cases: what was white´s last move?
IMPOSSIBLE
But this is not a position you´d like to analyze.
| Posted by philaretus
uskidscompute.com
1/03/2004
14:43:58
Play online chess | The simplest.....
Message:
.....impossible position is a completely empty board. Setting this up on some old-time chessplaying programs used to cause them to crash. :)
———
Great intuitive sacrifice — The exchange sacrifice -- trading a rook for a knight or a bishop -- is a magnificent tool in today's chess. It seldom wins outright. It is played for positional gain and calculation is often not required. Former world chess champion Tigran Petrosian loved it because he used it to get squares from which he could suffocate his opponent. The sacrifice is best suited for the black pieces in the Sicilian defense where the semi-open c-file tempts the black rook to eliminate the white horse on c3 before it can gallop off and do some damage. White is left with an unpleasant, immobile double-pawn and with holes into which black pieces can easily slide. Sometimes it destroys ...
Posted by henwick
uskidscompute.com
1/04/2004
01:04:48
Play online chess | Not quite impossible tgtp :)
Message:
The position you give could theoretically arise from e.g.
Black ka8, qb7, pg7, ph7
White Ke1, Qb1, Qc7
Black plays ...Qb6 and white replies Q(b1)xb6
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Chess notes — The month of December has produced considerable drama and new champions for chess archives. First, the 128-player World Chess Cup field was, after knockout play, finally reduced to Ruslan Ponomariov of Ukraine and Boris Gelfand of Israel (formerly of Belarus), both of whom had survived six rounds. The subsequent struggle between Gelfand and Ponomariov was a real nail-biter. They drew their first four games at normal time controls. The rapids also produced a tied score. Play then moved on to Blitz, a full game in five minutes for each player. Here, both competitors played queen side openings, but Gelfand excelled, winning the first game by trapping Ponomariov’s queen, resigning ...
Posted by tgtp
uskidscompute.com
1/04/2004
02:25:26
Play online chess | henwick
Message:
sorry, you missed the point that it is white to move in my example.
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Victory Caps Breakout Year for a Player From Brooklyn — In most chess games between top players, victory is usually determined by a few minor errors by one of them. Blowouts are rare. That was not the case at the 93rd Marshall Chess Club Championship, which ended last weekend. The chess club, on West 10th Street in Manhattan, is one of the oldest and, based on its membership, strongest in the country. The club is named after Frank J. Marshall, the United States champion from 1909 to 1936. Marshall was a swashbuckling player, and he would have appreciated many of the games at this year’s tournament. The field included eight grandmasters and three international masters. The runaway winner was Alex Lenderman ...
Posted by henwick
uskidscompute.com
1/04/2004
04:28:41
Play online chess | tgtp
Message:
Sorry, YOU are right. I was confused by your message ending up "what was white´s last move?"
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Jon Ludvig Hammer follows in Magnus Carlsen's footsteps as Norway gains in power — A world-class chess talent can often spark others in his or her country to raise their sights. This happened in England in the 1970s, and now Norway, formerly a chess backwater, is experiencing a boom due to Magnus Carlsen's exploits. The Norwegian government has just announced that it will give $12m (ÂŁ7.5m) backing to the Arctic town Tromso to stage the 2014 world team Olympiad. Carlsen's first prize in the London Classic was matched in the open chess event by his countryman, Jon Ludvig Hammer, also a 19-year-old, who led all the way from a strong field. And England's No 2 woman Jovanka Houska, whose tied second was a career-best result, now lives in Norway. The game ...
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