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- Q797773 subject Q6955998.
- Q797773 abstract "The Babson task is a kind of chess problem of the form "White to move and mate Black in n moves against any defence" (a directmate) with the following play:White makes his first move.Black defends by promoting a pawn to a queen, rook, bishop or knight.White responds by also promoting a pawn to queen, rook, bishop or knight respectively. That is, if Black promoted to rook, so does White, if Black promoted to knight, so does White and so on. No other promotion (or any other move) leads to a forced mate in the stipulated number of moves.The task is named after the first person to speculate about the possibility of such a problem, Joseph Ney Babson. It is regarded as one of the greatest challenges for a composer of chess problems to devise a satisfying Babson task problem, and for around half a century the task was considered to be near-impossible in directmate form.Technically, the task can be regarded as a form of Allumwandlung with corresponding promotions by Black and White. An Allumwandlung is a problem which contains, at some point in the solution, promotions to each of the four possible pieces—such problems had already been composed before Babson devised his task.".
- Q797773 wikiPageExternalLink babso.
- Q797773 wikiPageExternalLink Babson_docu.pdf.
- Q797773 wikiPageExternalLink puzz13a.htm.
- Q797773 wikiPageExternalLink viewtopic.php?f=19&t=560.
- Q797773 wikiPageExternalLink ~yarosh.
- Q797773 wikiPageExternalLink babsonsons.htm.
- Q797773 wikiPageExternalLink babson1.htm.
- Q797773 wikiPageExternalLink kazan.htm.
- Q797773 wikiPageExternalLink babs.html.
- Q797773 wikiPageWikiLink Q134.
- Q797773 wikiPageWikiLink Q135.
- Q797773 wikiPageWikiLink Q136.
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- Q797773 wikiPageWikiLink Q1687611.
- Q797773 wikiPageWikiLink Q1971550.
- Q797773 wikiPageWikiLink Q208330.
- Q797773 wikiPageWikiLink Q211115.
- Q797773 wikiPageWikiLink Q215599.
- Q797773 wikiPageWikiLink Q221950.
- Q797773 wikiPageWikiLink Q2705448.
- Q797773 wikiPageWikiLink Q2736.
- Q797773 wikiPageWikiLink Q282112.
- Q797773 wikiPageWikiLink Q3419547.
- Q797773 wikiPageWikiLink Q352975.
- Q797773 wikiPageWikiLink Q3754377.
- Q797773 wikiPageWikiLink Q4521258.
- Q797773 wikiPageWikiLink Q541144.
- Q797773 wikiPageWikiLink Q6955998.
- Q797773 wikiPageWikiLink Q900.
- Q797773 comment "The Babson task is a kind of chess problem of the form "White to move and mate Black in n moves against any defence" (a directmate) with the following play:White makes his first move.Black defends by promoting a pawn to a queen, rook, bishop or knight.White responds by also promoting a pawn to queen, rook, bishop or knight respectively. That is, if Black promoted to rook, so does White, if Black promoted to knight, so does White and so on.".
- Q797773 label "Babson task".