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Like human players, the program had a large number of stored "patterns", and analyzing a position involved matching these patterns to suggest [[Planning|plans]] for attack or defense. By communicating plans down the [[Search Tree|tree]], the analysis was verified and possibly corrected by a small [[Search|search]] of the game tree (tens of positions) inluding specialized causality facility and [[Quiescence Search|quiescence search]] <ref>[https://www.stmintz.com/ccc/index.php?id=348861 Comparison: Paradise and Symbolic] by [[Steven Edwards]], [[CCC]], February 13, 2004</ref>. There were production rules to produce plans, implementing such concepts as [[Checkmate|checkmate]], [[Double Attack|fork]], [[Skewer|skewer]], and [[Trapped Pieces|trapping]] the piece, etc..
A plan generator produced tactical plans in a Plan Language. The program is capable of finding very deep [[Combination|combinationsbecause]] because no limit is placed on its [[Depth|search depth]]. It searches for moves as long as a plan is continuing to work <ref> [[Tristan Caulfield]] ('''2004'''). ''Acquiring and Using Knowledge in Computer Chess''. B.Sc. Computer Science, [https://en.wikipedia.org/wiki/University_of_Bath University of Bath], [http://opus.bath.ac.uk/16854/1/CSBU pdf], 4.2.2 PARADISE, pp. 12</ref>.
=Win at Chess=
* [[Eric B. Baum]] ('''2004'''). ''[http://www.whatisthought.com/ What is Thought?]'' Bradford Book, Paradise mentioned at pp. 193
* [[Tristan Caulfield]] ('''2004'''). ''Acquiring and Using Knowledge in Computer Chess''. B.Sc. Computer Science, [https://en.wikipedia.org/wiki/University_of_Bath University of Bath], [http://opus.bath.ac.uk/16854/1/CSBU pdf], 4.2.2 PARADISE, pp. 12
* [[Diego Rasskin-Gutman]] ('''2009'''). ''[httphttps://mitpress.mit.edu/catalogbooks/item/default.asp?ttype=2&tid=11847 chess-metaphors Chess Metaphors - Artificial Intelligence and the Human Mind]''. ISBN-13: 978-0-262-18267-6, translated by [http://mitpress.mit.edu/catalog/author/default.asp?aid=36831 Deborah Klosky], [https://en.wikipedia.org/wiki/MIT_Press MIT Press], 5 Chess Metaphors: Searches and Heuristics, pp. 125, Paradise pp. 136
=Forum Posts=
