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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 | ||
