====== SecondChess ======

{{secondchess.png}}

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 =====
  * One single C code file heavily commented, around 2000 lines
  * Licensed under GPL: source available at https://github.com/emdio/secondchess
  * Board representation: one 64 int array for pieces and one 64 int array for colors
  * 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
  * Simple evaluation: material + piece square tables
  * Simple Alpha-Beta search + Quiescent
  * 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 =====
  * Pham Hong Nguyen, author of FirstChess
  * Ron Murawski for his generous help
  * Pedro Castro, author of Danasah https://sites.google.com/site/danasah/
  * Graham Banks and Dusan Stamenkovic for their logos
  * Tony Mokonen for his windows compilations
  * Tom Kerrigan for TSCP http://www.tckerrigan.com/Chess/TSCP/
  * Bruce Moreland for his site in chess computers
  * The people that admin and post on talkchess.com: http://talkchess.com
  * The authors of http://chessprogramming.wikispaces.com/
  * Jonatan Pettersson, author of Mediocre Chess http://mediocrechess.blogspot.com.es/
  * Many more...



===== Downloads =====

Code available at https://github.com/pocopito/secondchess