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computer_chess:engines:secondchess:index 2012/08/01 05:47 computer_chess:engines:secondchess:index 2015/04/22 13:27 current
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====== SecondChess ====== ====== SecondChess ======
-{{http://computer-chess.org/data/media/logos/SecondChess.png}}+{{secondchess.png}}
-SecondChess is a didactical chess engine written in C by Emilio Díaz and based on FirstChess code of Pham Hong Nguyen.+SecondChess is a didactical chess engine written in C by Emilio Díaz and based on FirstChess code of Pham Hong Nguyen, addressed to programmers who want to learn how a chess engine works.
===== Main Features ===== ===== Main Features =====
-  * One single C file heavily commented, around 2000 lines +  * One single C code file heavily commented, around 2000 lines 
-  * Addressed to programmers who want to learn how a chess engine works +  * Licensed under GPL: source available at https://github.com/emdio/secondchess 
-  * Rules Implemented: castle, en passant and promotion (For the sake of simplicity, no three moves repetition nor 50 moves rule) +  * Board representation: one 64 int array for pieces and one 64 int array for colors 
-  * No time management+  * Rules Implemented: castle, en passant and promotion 
 +  * **Robust move generator:** al positions tested so far have been matched by secondchess 
 +  * **perft** function implemented
  * Selectable search depth   * Selectable search depth
  * Simple evaluation: material + piece square tables   * Simple evaluation: material + piece square tables
-  * Simple Alpha-Beta search+  * Simple Alpha-Beta search + Quiescent
  * Basic Xboard support   * Basic Xboard support
 +===Lacks===
 +  * No three moves repetition
 +  * No 50 moves rule
 +  * After every two squares pawn move an en passant square is created, most of the times unnecessarily
 +  * No time management
===== Acknowledgments ===== ===== Acknowledgments =====
  * Pham Hong Nguyen, author of FirstChess   * Pham Hong Nguyen, author of FirstChess
-  * Ron Murawski for his generosity+  * Ron Murawski for his generous help
  * Pedro Castro, author of Danasah https://sites.google.com/site/danasah/   * Pedro Castro, author of Danasah https://sites.google.com/site/danasah/
  * Graham Banks and Dusan Stamenkovic for their logos   * Graham Banks and Dusan Stamenkovic for their logos

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