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the picture at the morphy thing seems wrong... what do you think? left picture is my idea.
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Paul Morphy is credited with composing the position at right "while still a young boy". After 1.Ra6, Black is in zugzwang and must allow mate on the next move with 1...bxa6 2.b7# or 1...B (moves) 2.Rxa7#. (Shibut 2004,p 297)
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This claim is refuted by tempo where the only example of gaining tempo uses a knight. Did the author mean "this knight is unable to make a tempo move"? If so, why is there a citation? — Preceding unsigned comment added by TricksterWolf ( talk • contribs) 11:19, 26 October 2018 (UTC)
The article states that "The only way for White to win is 1.Ra1 Kxa1 2.Kc2"
I think this is incorrect. Ra1 is a fantastic move, but (unless I'm counting wrongly) White can win as follows
White King has sufficient head start such that Black can't prevent white taking both black pawns and clearing a route to promote the white one. — Preceding unsigned comment added by 185.45.170.74 ( talk) 23:52, 21 March 2019 (UTC)
Now if 6. Kxg6 Ke6 (draw)
Got it, thanks - I knew I was missing something - the concept that B does have time to stop the W K getting back to the W P, provided B doesn’t head for it directly. — Preceding unsigned comment added by 82.39.80.69 ( talk) 21:42, 22 March 2019 (UTC)
My (Chesterday´s) comment
Both in the WWW and in chess literature, there are many examples, where the term zugzwang is used in positions whose evaluation is independent of the right to move. That leads to contradictions and a lot of confusions, because there is no difference between the German terms Zugzwang and Zugpflicht (if it is your move, you have to move!). This problem can be removed by the following definition: A player is in zugzwang when he (to move) is lost and his opponent - if he were to move - could draw (at most). In such a situation, everyone would like to transfer the right to move to the opponent. Examples s. Chess Through a Magnifying Glass. Chesterday ( talk) 10:31, 6 February 2020 (UTC)
Zugzwang
Zugzwang in chess
Point one of your list includes the positions (+/+), (+/=) and (=/+), point 2 includes positions of normal zugzwang, i.e. (-/=) and (=/-), and point 3 positions of reciprocal or mutual zugzwang, i.e. (-/-)-positions. There are some types of chess positions missing in your list of chess positions, namly the following ones: (=/=) (+/-) (-/+). This leads to contradictions in a number of examples:
Examples from games
Fischer versus Taimanov, second match game
1971, game 2: In the starting position after 85.Bf5 Black is not in zugzwang. The position is won for White independent from the rigth to move. Otherwise it would contradict the definition of zugzwang given before.
Fischer versus Taimanov, fourth match game
The same is true for the comment after 87.Kg6: Black is not in zugzwang. He is simply lost independent of the right to move. This endgame has nothing to do with zugzwang! The same is true for Fischer versus Taimanov, fourth match game after 61. Be8: There is no zugzwang!
Reciprocal zugzwang
The position Hooper 1970, p.21 is zugzwang but not reciprocal zugzwang. Otherwise it would contradict the afore given definition!
There are a lot of more contradictions in the rest of the article. Some of the examples are also used on the website http://www.schachlupe.de/index-GB.html. Chesterday ( talk) 22:39, 11 December 2020 (UTC)
The definition of zugzwang at the beginning of the article is problematic. It says that the position of the player to move will become weaker or worsen by the move. But the position is already weak or bad, because of the compulsion to move (zugpflicht). A better definition should say that a player is in zugzwang if his position were better if he had the option not to move at all. It is a comparison between the real and a hypothetical situation, not between the situations before and after a move.
Before editing the article, I'd like to know your comments. -- Peter Buch ( talk) 08:35, 6 August 2021 (UTC)