Harald Lüßen

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Harald Lüßen, a German software developer, computer chess programmer and author of the WinBoard compliant chess engine Elephant , which is known for bitboard comparisons in sliding piece attacks . During the late 80s, Harald already wrote two private chess programs, one in GFA-Basic, and the second one in C for the Atari ST. After more than 10 years "out of business", he found bitboard explanations in the German magazine Computerschach und Spiele, and started his work on Elephant in August 2002. He proposed Exploding Bitboards and elaborated on Michael Sherwin's Sherwin Bitboards .

Forum Posts

2004

• Elephant 1.00, a new winboard engine by Harald Lüßen, CCC, March 15, 2004

2005 ...

• Re: Compact Bitboard Attacks by Harald Lüßen, Winboard Forum, September 13, 2006 » Exploding Bitboards
• Re: New bitboard move generator by Harald Lüßen, Winboard Forum, September 19, 2006 » Sherwin Bitboards
• Re: New bitboard move generator by Harald Lüßen, Winboard Forum, September 21, 2006
• From PGN databases to a better evaluation by Harald Lüßen, CCC, July 11, 2007
• Re: BitBoard Tests Magic v Non-Rotated 32 Bits v 64 Bits by Harald Lüßen, CCC, August 24, 2007 » Sliding Piece Attacks (Bitboard methods compared)
• Python PGN reader and opening databases by Harald Lüßen, CCC, November 11, 2007
• Re: Bitboard Engine by Harald Lüßen, Winboard Forum, Aprril 10, 2008

2010 ...

• Perft and en_passant by Harald Lüßen, CCC, September 11, 2012 » Perft, En passant
• Draw by 50 move rule or mate by Harald Lüßen, CCC, October 13, 2012 » Fifty-move Rule
• Re: 5th WCCC 1986, video on youtube by Harald Lüßen, CCC, March 20, 2013 (English summary) » WCCC 1986 Video

2015 ...

• Re: fast(er) movegen by Harald Lüßen, CCC, December 26, 2018
• Winboard state machine diagram by Harald Lüßen, CCC, April 15, 2019

External Links

• Elephant from WBEC Ridderkerk (Wayback Machine)

References

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