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=Chess Composer=
==Bitboards==
In his thesis <ref>[[Fridel Fainshtein]] ('''2006'''). ''An Orthodox k-Move Problem-Composer for Chess Directmates''. M.Sc. thesis, [[Bar-Ilan University]], [http://www.problemschach.de/KMOVEComposer.pdf pdf], Appendix D - 64-bit Representation, pp. 105</ref> ,
and the 2006 [[ICGA Journal#JournalAward|ICGA Journal Award]] winning paper ''A Chess Composer of Two-Move Mate Problems'', co-authored by his thesis supervisor [[Yaakov HaCohen-Kerner]],
[[Sliding Piece Attacks|Sliding piece attacks]] were generated by a hybrid [[Hiding the Implementation|none rotated approach]] of [[First Rank Attacks#AttacksOnAllRanks|rank lookups]] and the [[Classical Approach|classical approach]] along with some [[Bit-Twiddling|bit-twiddling]]
<ref>[[Fridel Fainshtein]], [[Yaakov HaCohen-Kerner]] ('''2006'''). ''A Chess Composer of Two-Move Mate Problems''. [[ICGA Journal#29_1|ICGA Journal, Vol. 29, No. 1]], [http://homedir.jct.ac.il/~kerner/pdf_docs/ICGA_computer_composer.pdf pdf], Appendix E: 64-bit representation</ref> .
==Abstract==
Computerized [https://en.wikipedia.org/wiki/Chess_composer chess composers] of [https://en.wikipedia.org/wiki/Twomover#Types_of_problem mate problems] are rare. Moreover, so far they do not produce either impressive or creative new mate problems. In this paper, we describe a model called CHESS COMPOSER. This model uses a 64-bit representation, an ordered version of [[Iterative Deepening|Iterative-Deepening]] [[Depth-First|Depth-First Search]], and a quality function built with the help of two international masters in [https://en.wikipedia.org/wiki/Chess_problem chess-problem composition]. The result is applied on 100 known problems. It shows that the quality of 97 problems has been improved. Some of the improvements are rather impressive considering that most of the tested problems were composed by experienced composers. The new, improved problems can be regarded as creative from the viewpoint of experts in chess compositions, because (1) they seem to be better, and (2) they are not too similar to the original problems.
=Selected Publications=
