Chinese Chess

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Chinese Chess, or Xiangqi 象棋 , is a version of chess very popular in east Asia. The rules are analogues to international chess. The Chinese Chess set includes a board and 32 pieces for two players. The board has ten horizontal lines called ranks and nine vertical lines called files. In the middle of the board the central seven files are interrupted by a horizontal space called the “River”, which splits the board into two parts. Each side of the board has a “Palace” a 3x3 area in the central base. The seven kind of pieces are placed on the intersections and move and capture according to their individual ability and restriction along the lines including the “River banks”. The two sides are usually distinguished by color, being red or black.

The object of the game is to checkmate or stalemate (is a win as well) the opponent King aka General. However, partly due to the freedom and power of the Rook over other pieces, and the limited freedom of the General, it is forbidden to repeat perpetually a direct thread (i.e. perpetual check 長將, perpetual thread of capture 長捉, a check and then a threat of mate 一將一殺, or a combination of these). This needs to be taken into account in the board representation.

=Pieces= Pieces on the red side bear different characters than their counterparts on the black side. They are the same pieces, but names on the Red side are subtly more noble than those on the Black side.

=Xiangqi Engines=
 * Abyss
 * Chimo
 * HaQiKi D
 * Shiga
 * Sjaak (Glebbeek)
 * Xian
 * XieXie
 * Zillions of Games

=Computer Olympiads=
 * 1st Computer Olympiad, London 1989
 * 2nd Computer Olympiad, London 1990
 * 3rd Computer Olympiad, Maastricht 1991
 * 4th Computer Olympiad, London 1992
 * 6th Computer Olympiad, Maastricht 2001
 * 7th Computer Olympiad, Maastricht 2002
 * 8th Computer Olympiad, Graz 2003
 * 9th Computer Olympiad, Ramat Gan 2004
 * 10th Computer Olympiad, Taipei 2005
 * 11th Computer Olympiad, Turin 2006
 * 12th Computer Olympiad, Amsterdam 2007
 * 13th Computer Olympiad, Beijing 2008
 * 14th Computer Olympiad, Pamplona 2009
 * 15th Computer Olympiad, Kanazawa 2010
 * 16th Computer Olympiad, Tilburg 2011
 * 17th Computer Olympiad, Yokohama 2013
 * 18th Computer Olympiad, Leiden 2015
 * 19th Computer Olympiad, Leiden 2016
 * 20th Computer Olympiad, Leiden 2017

=Photos= Xiangqi winners in Graz 2003, Pascal Tang, Zhi-Jian Tu and Shun-Chin Hsu Xiangqi winners Taipei 2005 with TD Jaap van den Herik and representative of the sponsor [https://en.wikipedia.org/wiki/Acer_Inc. Acer Inc.], Mingyang Zhao (Gold), Ming-Cheng Cheng (Silver) and Jiao Wang (Bronze) Yokohama 2013, Wen-Jie Tseng, Shi-Jim Yen, Harm Geert Muller and Jaap van den Herik

=Publications=

1981 ...

 * Y.T. Zhang (1981). Application of Artificial Intelligence in Computer Chinese Chess. M.Sc. thesis, Department of Electrical Engineering, National Taiwan University (Chinese)
 * Shun-Chin Hsu, D.H. Huang (1985). Design and Implementation of a Chinese Chess Knowledge Base. Proceedings of NCS, pp. 505-509. (Chinese)
 * Robert Nisonoff, M. Stephanie Ricks (1988). To Catch a King: East Meets West in the Game of Chess. PC Magazine, October 31, 1988, pp. 506 » EGA Chess, Xian
 * Nick Jacobs (1989). Xian, a Chinese Chess Program. Heuristic Programming in AI 1

1990 ...

 * Shun-Chin Hsu (1990). Introduction to Computer Chess and Computer Chinese Chess. Journal of Computer, Vol. 2, No. 2, pp. 1-8. (in Chinese)
 * Kuo-Ming Tsao, Jen-Hsuan Li, Shun-Chin Hsu (1991). Design and Implementation of a Chinese Chess Program. Heuristic Programming in AI 2
 * Shun-Chin Hsu, Kuo-Ming Tsao (1991). Design and Implementation of an Opening Game Knowledge-Base System for Computer Chinese Chess. Bulletin of the College of Engineering, N.T.U., No. 53, pp. 75-86. (in Chinese)
 * Chun Ye (1992). Experiments in Selective Search Extensions. MSc. thesis, Department of Computing Science, University of Alberta, pdf
 * Chun Ye, Tony Marsland (1992). Experiments in Forward Pruning with Limited Extensions. ICCA Journal, Vol. 15, No. 2, pdf
 * Chun Ye, Tony Marsland (1992). Selective Extensions in Game-Tree Search. Heuristic Programming in AI 3, pdf
 * Yi-Fan Ke, Tai-Ming Parng (1993). The Guard Heuristic: Legal Move Ordering with Forward Game-Tree Pruning. ICCA Journal, Vol. 16, No. 2
 * Mei-En Chen, Yo-Ping Huang (1995). Guard heuristic by dynamic fuzzy reasoning model for Chinese chess. Proceedings of ISUMA-NAFIPS '95

2000 ...
2002 2003 2004
 * Jr-Chang Chen, Shun-Chin Hsu (2001). ELP wins Chinese Chess tournament. ICGA Journal, Vol. 24, No. 3 » 6th Computer Olympiad
 * Haw-ren Fang, Tsan-sheng Hsu, Shun-Chin Hsu (2001). Construction of Chinese Chess Endgame Databases by Retrograde Analysis. CG 2000
 * Ren Wu, Don Beal (2002). A memory efficient retrograde algorithm and its application to solve Chinese Chess endgames. More Games of No Chance edited by Richard J. Nowakowski
 * Jr-Chang Chen, Shi-Jim Yen, Shun-Chin Hsu (2002). ELP wins Chinese Chess tournament. ICGA Journal, Vol. 25, No. 3 » 7th Computer Olympiad
 * Haw-ren Fang, Tsan-sheng Hsu, Shun-Chin Hsu (2002). Indefinite Sequence of Moves in Chinese Chess Endgames. CG 2002
 * Jr-Chang Chen, Shi-Jim Yen, Shun-Chin Hsu (2003). ZMBL wins Chinese Chess tournament. ICGA Journal, Vol. 26, No. 4 » 8th Computer Olympiad
 * Haw-ren Fang, Tsan-sheng Hsu, Shun-Chin Hsu (2004). Checking Indefinitely in Chinese-Chess Endgames. ICGA Journal, Vol. 27, No. 1
 * Shi-Jim Yen, Jr-Chang Chen, Tai-Ning Yang, Shun-Chin Hsu (2004). Computer Chinese Chess. ICGA Journal, Vol. 27, No. 1, pdf
 * Haw-ren Fang (2004). Rule-Tolerant Verification Algorithms for Completeness of Chinese-Chess Endgame Databases. CG 2004
 * Kuang-Che Wu, Tsan-Sheng Hsu, Shun-Chin Hsu (2004). Contemplation wins Chinese Chess tournament. ICGA Journal, Vol. 27, No. 3 » 9th Computer Olympiad

2005 ...
2006 2007 2008 2009
 * Haw-ren Fang (2005). The Nature of Retrograde Analysis for Chinese Chess, Part I. ICGA Journal, Vol. 28, No. 2
 * Haw-ren Fang (2005). Nature of Retrograde Analysis for Chinese Chess, Part II. ICGA Journal, Vol. 28, No. 3
 * Jr-Chang Chen, Shi-Jim Yen, Shun-Chin Hsu (2005). XQMaster wins Chinese Chess tournament. ICGA Journal, Vol. 28, No. 3 » 10th Computer Olympiad
 * Kuang-Che Wu, Shun-Chin Hsu, Tsan-sheng Hsu (2006). The Graph-History Interaction Problem in Chinese Chess. Advances in Computer Games 11
 * Xinhe Xu (2006). Principle and Methodology of Computer Games of Chinese Chess. ISDA 2006
 * Bo-Nian Chen, Pangfeng Liu, Shun-Chin Hsu, Tsan-sheng Hsu (2008). Abstracting Knowledge from Annotated Chinese-Chess Game Records. CG 2006
 * Shi-Jim Yen, Shun-Chin Hsu (2006). NEUChess wins Chinese Chess tournament. ICGA Journal, Vol. 29, No. 2 » 11th Computer Olympiad
 * Chun-Bin Hsu (2006). Pattern Recognition in Chinese Chess. Master thesis, National Chiao Tung University, pdf (Chinese)
 * Changming Xu (2007). NEUChess wins Chinese Chess tournament. ICGA Journal, Vol. 30, No. 2 » 12th Computer Olympiad
 * Chin Soon Ong, Hanyang Quek, Kay Chen Tan, Arthur Tay (2007). Discovering Chinese Chess Strategies through Coevolutionary Approaches. IEEE Symposium on Computational Intelligence and Games, pdf
 * Bo-Nian Chen, Pangfeng Liu, Shun-Chin Hsu, Tsan-sheng Hsu (2008). Knowledge Inferencing on Chinese Chess Endgames. CG 2008
 * Jiao Wang, Xinhe Xu (2008). Intella wins Chinese Chess tournament. ICGA Journal, Vol. 31, No. 3 » 13th Computer Olympiad
 * Bo-Nian Chen, Pangfeng Liu, Shun-Chin Hsu, Tsan-sheng Hsu (2009). Conflict Resolution of Chinese Chess Endgame Knowledge Base. Advances in Computer Games 12, pdf
 * Guofeng Tong, Ying Qu, Tong Cheng (2009). Human-computer interactive gaming system - a chinese chess robot. IROS 2009, pp. 984-987 » Robots
 * Jr-Chang Chen, Bo-Nian Chen, Tsan-sheng Hsu (2009). TMSK wins the Chinese-Chess tournament. ICGA Journal, Vol. 32, No. 2 » 14th Computer Olympiad
 * Wei-Lun Kao (2009). The Automatically Tuning System of Evaluation Function for Computer Chinese Chess. Master thesis, National Chiao Tung University, pdf (Chinese)

2010 ...
2011 2013 2014
 * Jiao Wang, Si-Zhong Li, Xin-He Xu (2010). A Minors Hash Table in Chinese-Chess Programs. ICGA Journal, Vol. 33, No. 1
 * Bo-Nian Chen, Bing-Jie Shen, Tsan-sheng Hsu (2010). Chinese Dark Chess. ICGA Journal, Vol. 33, No. 2
 * Bo-Nian Chen, Pangfeng Liu, Shun-Chin Hsu, Tsan-sheng Hsu (2010). Knowledge Abstraction in Chinese Chess Endgame Databases. CG 2010
 * Jr-Hung Guo, Kuo-Lan Su, Sheng-Ven Shiau (2011). Path Searching Algorithms of Multiple Robot System Applying in Chinese Chess Game. Recent Advances in Mobile Robotics, Dr. Andon Topalov (Ed.), ISBN: 978-953-307-909-7, pdf » Robots
 * Wen-Jie Tseng, Jr-Chang Chen, I-Chen Wu, Ching-Hua Kuo, Bo-Han Lin (2013). A Supervised Learning Method for Chinese Chess Programs. JSAI2013, pdf
 * Jr-Chang Chen, Shi-Jim Yen, Tsan-Cheng Su (2013). SHIGA Wins Chinese Chess Tournament. ICGA Journal, Vol. 36, No. 3 » 17th Computer Olympiad
 * Bo-Nian Chen, Hung-Jui Chang, Shun-Chin Hsu, Jr-Chang Chen, Tsan-sheng Hsu (2013). Multilevel Inference in Chinese Chess Endgame Knowledge Bases. ICGA Journal, Vol. 36, No. 4 » Endgame Tablebases
 * Bo-Nian Chen, Hung-Jui Chang, Shun-Chin Hsu, Jr-Chang Chen, Tsan-sheng Hsu (2014). Advanced Meta-knowledge for Chinese Chess Endgame Knowledge Bases. ICGA Journal, Vol 37, No. 1

2015 ...

 * Qiang Gao, Xinhe Xu (2015). Research on the Computational Complexity of n x n Chinese Chess. ICGA Journal, Vol. 38, No. 1
 * Pascal Tang (2015). SHIGA wins Chinese Chess Tournament. ICGA Journal, Vol. 38, No. 4 » 18th Computer Olympiad

=Forum Posts=

1994

 * rec.games.chinese-chess FAQ by Stephen Leary, rec.games.chinese-chess, January 04, 1994, also from chessvariants
 * Xiang Qi Is Not The Elephant Game by Stephen Leary, rec.games.chinese-chess, November 18, 1994
 * Machine vs. IGM in Chinese Chess by Ren Wu, CCC, July 13, 1999

2000 ...

 * Tony Marsland and Chinese Chess in Maastricht (slightly O.T.) by Omid David, CCC, July 30, 2002 » 7th Computer Olympiad, Maastricht 2002
 * Re: Tony Marsland and Chinese Chess in Maastricht (slightly O.T.) by Pham Hong Nguyen, CCC, July 30, 2002


 * Bitboard techniques in Xiangqi by Harm Geert Muller, CCC, February 12, 2009 » Bitboards
 * Computer Olympiad (XQ) by Harm Geert Muller, CCC, May 14, 2009 » 14th Computer Olympiad, Pamplona 2009
 * Kindergarten bitboards and Xiangqi move genaration? by Han Chengye, CCC, December 30, 2009 » Kindergarten Bitboards

2010 ...

 * Xiangqi evaluation function by Gregory Strong, CCC, July 09, 2010 » Evaluation
 * Xiangqi chase algorithm by Evert Glebbeek, CCC, November 16, 2011 » Sjaak
 * Interesting (Chinese) Chess variant by Harm Geert Muller, CCC, January 23, 2014
 * UCCI2WB by Harm Geert Muller, CCC, October 27, 2014 » Protocols
 * UCI protocol for chess variants by Evert Glebbeek, CCC, October 28, 2014 » UCI
 * Xiangqi chase - again by Evert Glebbeek, CCC, November 06, 2014 » Sjaak

2015 ...

 * Evaluation in Xiangqi by Harm Geert Muller, CCC, July 06, 2015
 * 11-men tablebases (XQ) by Harm Geert Muller, CCC, May 23, 2016 » Endgame Tablebases
 * Xiangqi piece value model by Evert Glebbeek, CCC, May 29, 2016 » Point Value
 * Perft for Xiangqi & Shogi by Patrice Duhamel, CCC, June 12, 2016 » Shogi, Perft
 * Cumulative building of a shared search tree by Bojun Guo, CCC, December 28, 2016 » Opening Book, Persistent Hash Table
 * Probe EGT in quiescence? by Nguyen Pham, CCC, May 20, 2017 » Endgame Tablebases, Quiescence Search
 * A new design for Xianqgi (Chinese chess) Endgame Tablebase by Nguyen Pham, CCC, January 16, 2018 » Endgame Tablebases
 * Chinese Chess by Harm Geert Muller, CCC, May 22, 2018
 * Xiangqi evaluation by Harm Geert Muller, CCC, July 01, 2018
 * A proposal for Jeiqi notation by Nguyen Pham, CCC, December 26, 2018

=External Links=

Chinese Chess

 * World Xiangqi Federation [[FILE:wxf_logo.gif|none|border|text-bottom|link=http://www.wxf.org/xq/in.htm]]
 * Xiangqi from Wikipedia
 * Xiangqi: Chinese Chess from The Chess Variant Pages
 * How to Play Xiangqi - Chinese Chess
 * Chinese Chess or Xiangqi from Chinasage
 * How XiangQi can improve your chess by Davide Nastasio, ChessBase, December 06, 2017
 * rec.games.chinese-chess

Computer Chinese Chess

 * ICGA: Chinese Chess
 * Chinese Chess at the Computer Olympiad
 * Computer Chinese Chess by Tsan-sheng Hsu
 * XiangQi (Chinese Chess) by Harm Geert Muller
 * WinBoard and XiangQi by Harm Geert Muller


 * 中国象棋电脑应用规范(五)：中国象棋通用引擎协议 Universal Chinese Chess Protocol (UCCI)
 * 电脑象棋联赛 - 象棋百科全书 - Computer Chess League - Chess Encyclopedia

=References=

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