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dependency-directed backtracking

Theory and Practice of Logic Programming (1)

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PROGRAMMING PEARL: Enhancing a search algorithm to perform intelligent backtracking
MAURICE BRUYNOOGHE
Journal:

Theory and Practice of Logic Programming / Volume 4 / Issue 3 / May 2004

Published online by Cambridge University Press:

16 April 2004, pp. 371-380
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This paper illustrates how a Prolog program, using chronological backtracking to find a solution in some search space, can be enhanced to perform intelligent backtracking. The enhancement crucially relies on the impurity of Prolog that allows a program to store information when a dead end is reached. To illustrate the technique, a simple search program is enhanced.