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an experimental [[:Category:Open Source|open source chess engine]] under the [[Free Software Foundation#GPL|GNU General Public License]] written by [[Sven Reichard]] , written in [[Cpp|C++]], and compliant with the [[Chess Engine Communication Protocol]]. Alice is an [https://en.wikipedia.org/wiki/Object-oriented_programming object oriented] program developed under [https://en.wikipedia.org/wiki/GNU_Compiler_Collection GCC] and [[Linux]]. The board is a [[Array|vector]] of 64 [https://en.wikipedia.org/wiki/Pointer_%28computer_programming%29 pointers] to [[Pieces|pieces]], while piece is an [[Cpp#AbstractClass|abstract class]], with intermediate subclasses for common piece properties such as [[Sliding Pieces|sliding]] versus none sliding pieces, and finally instantiable subclasses for the concrete pieces, like [[Pawn|pawn]], [[Rook|rook]], etc., and "null pieces" for the empty squares <ref>[https://www.stmintz.com/ccc/index.php?id=237379 Re: Gestatten: Alice] by [[Sven Reichard]], [[CCC]], June 25, 2002</ref>. [[Jim Ablett]] provides recent compiles for 32/64-bit [[Windows]] and [[Linux]] <ref>[http://wwwkirr.talkchesshomeunix.comorg/chess/engines/Jim%20Ablett/ALICE/ Index of /chess/forumengines/viewtopic.php?topic_view=threads&p=495991&t=46252 Re: Sorry guys, I have to ask for another engine: AliceJim Ablett/ALICE] by [[Jim Ablett]], hosted by [[CCCKirill Kryukov]], December 08, 2012</ref>.