Steven Edwards
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Steven James Edwards, (February 7, 1957 - October 1, 2016 [1])
was an American computer scientist, BS and MS in Mathematics, and computer chess programmer. Steven Edwards coordinated and specified the PGN- and EPD-standards and the FEN-Position Description [2]. In 1994 he introduced a distance to mate endgame tablebase format, called the Edwards’ Tablebases. He is author of multiple chess programs and toolkits, Spector, Symbolic, the Chess in Lisp (CIL) package [3] [4], a portable ChessLisp interpreter [5], and the Chess for Arduino Mega Myopic [6] and the Chess in Pascal CookieCat [7] projects [8]. Steven Edwards has been actively involved in Perft computations, where he computed and verified perft of the initial position up to a depth of 13, now available in the On-Line Encyclopedia of Integer Sequences [9] .
Steven Edwards died on October 1, 2016 at age 59 at his home in Raymond, New Hampshire, only a few weeks after his father James Edwards passed away [10], who introduced him to chess [11].
Forum Posts
1990 …
- gnuchess.book in Lisp by Steven Edwards, gnu.chess, January 23, 1990 » Opening Book
- 24th ACM Computer Chess Championship by Steven J. Edwards, rgc, June 25, 1994 » ACM 1994
ACM 1994: Spector’s games by Steven J. Edwards, rgc, June 29, 1994 » Spector
- Announcing forced mates: a poll by Steven J. Edwards, rgc, July 21, 1994 » Edwards’ Tablebases
- KBBK tablebases: attempt #2 by Steven J. Edwards, rgc, August 13, 1994
- Updated tablebase documentation by Steven J. Edwards, rgc, October 14, 1994
- KPK tablebases now available via ftp by Steven J. Edwards, rgc, October 14, 1994
1995 …
- Re: FICS vs. ICS: No, really, which is better? by Steven J. Edwards, alt.chess.ics, June 01, 1995
- The B* Algorithm by Steven Edwards, rgc, June 06, 1995 » B*
- Re: Speed of Move Generator by Steven Edwards, rgcc, August 16, 1995 » Perft, Spector
- ICCAJ v.19 n.2 now in North America by Steven Edwards, rgcc, July 03, 1996 » ICCA Journal, Vol. 19, No. 2
- KRBKB and ACM USCCC #6 by Steven J. Edwards, rgcc, September 29, 1996 » ACM 1975, Treefrog, David Levy
- EPD examples: Bratko-Kopec test suite by Steven J. Edwards, CCC, June 15, 1998 » Extended Position Description, Bratko-Kopec Test
2000 …
- PGN upddate and revisions by Steven Edwards, rgcc, May 21, 2002 » Portable Game Notation
- Paradise performance by Steven Edwards, CCC, August 22, 2003 » Paradise
- Comparison: Paradise and Symbolic by Steven Edwards, CCC, February 13, 2004 » Paradise, Symbolic
- On naming one’s chess program by Steven Edwards, CCC, March 27, 2004
2005 …
- Fruit fly races by Steven Edwards, CCC, April 06, 2005 » Artificial Intelligence
- Re: Cloned Chess Engines by Steven Edwards, CCC, May 05, 2005 » Clones
- POSIX threads by Steven Edwards, CCC, July 05, 2005 » Thread
- For chess program source collectors by Steven Edwards, Chess Circle, August 13, 2006
- Retrocomputing with the 6502 by Steven Edwards, CCC, June 22, 2007 » 6502
2008
- Incremental updating for positional evaluation by Steven Edwards, CCC, March 27, 2008 » Incremental Updates
- Working notes: A similarity facility by Steven Edwards, CCC, May 02, 2008
- How common is Common Lisp? by Steven Edwards, CCC, August 2, 2008
- A decade from now … by Steven Edwards, CCC, August 14, 2008
- CIL Toolkit: code snippets: move generation by Steven Edwards, CCC, August 19, 2008
- Could this program be written? by Steven Edwards, CCC, August 24, 2008 » Retrograde Analysis
- Lisp quotes by Steven Edwards, CCC, September 04, 2008
2009
- Interlock clusters by Steven Edwards, CCC, January 25, 2009
- Hyperthreading Hype predates Intel by Steven Edwards, CCC, February 07, 2009
- Multithreaded movepath enumeration (perft) by Steven Edwards, CCC, February 27, 2009 » Perft
- Move generation: staged vs all-at-once by Steven Edwards, CCC, April 30, 2009 » Move Generation
- Pondering? Yes. Ponder move? Maybe not by Steven Edwards, CCC, July 30, 2009 » Pondering
2010 …
- Myopic, a new Creative Commons chess program by Steven Edwards, CCC, May 22, 2010
- ChessLisp for everyone!, CCC, July 22, 2010
2011
- Unicode values for chessmen by Steven Edwards, CCC, March 07, 2011 » Game Notation
- A brief history of the popcnt instruction by Steven Edwards, CCC, March 22, 2011 » Population Count
- The LBR move ordering heuristic by Steven Edwards, CCC, March 26, 2011 » Last Best Reply
- Testing LBR by Steven Edwards, CCC, March 27, 2011
- An alternative means of PV recovery by Steven Edwards, CCC, April 17, 2011 » Principal Variation
- Perft(12) count confirmed by Steven Edwards, CCC, April 25, 2011 » Perft
- Some spinlock code, just for you by Steven Edwards, CCC, June 01, 2011 » Parallel Search
- Spinlocks galore by Steven Edwards, CCC, June 02, 2011
- One billion random games by Steven Edwards, CCC, August 27, 2011
- Announcement: The Bozochess Project by Steven Edwards, CCC, October 05, 2011 » Pascal
- Perft(3) from 1978, with a twist! by Steven Edwards, CCC, December 08, 2011 [14]
- Number sequence puzzle by Steven Edwards, CCC, December 16, 2011 » Endgame Tablebases [15]
- CookieCat Monday release schedule by Steven Edwards, CCC, December 19, 2011 » CookieCat
- Tablebase class name list available by Steven Edwards, CCC, December 19, 2011 » Endgame Tablebases
- The Raspberry Pi Thread by Steven Edwards, CCC, December 24, 2011 » Raspberry Pi
2012
- One hundred years ago, the first chess computer by Steven Edwards, CCC, January 05, 2012 » El Ajedrecista
- CookieCat’s opening book implementation by Steven Edwards, CCC, January 05, 2012 » CookieCat, Opening Book
- CookieCat source via the net by Steven Edwards, CCC, January 26, 2012
- Computing from the Old Days, brought back to life by Steven Edwards, CCC, August 16, 2012 » 8080
- CookieCat and perft by Steven Edwards, CCC, October 14, 2012
2013
- For a limited time, two sources by Steven Edwards, CCC, January 22, 2013
- Yet another time allocation heuristic by Steven Edwards, CCC, February 17, 2013 » Time Management
- Perft(14) estimates thread by Steven Edwards, CCC, February 26, 2013
- Perft(15) estimates thread by Steven Edwards, CCC, April 10, 2013
- An idea for move ordering at the root by Steven Edwards, CCC, June 09, 2013 » Move Ordering, Root
- DGT e-Board by Steven Edwards, CCC, June 09, 2013
- A perft() benchmark by Steven Edwards, CCC, June 26, 2013
- One billion random games by Steven Edwards, CCC, July 03, 2013
- Resurrecting the Super Constellation by Steven Edwards, CCC, July 07, 2013 » Super Constellation
- Standard candles by Steven Edwards, CCC, August 27, 2013
- DGT board C++ interface project by Steven Edwards, Hiarcs Forum, December 07, 2013 » DGT Board
- Atari 2600 Video Chess by Steven Edwards, Hiarcs Forum, December 29, 2013 » Video Chess
2014
- New robotic arm offering by Steven Edwards, Hiarcs Forum, January 23, 2014 » Robots
- Perft(14) revisited by Steven Edwards, CCC, August 08, 2014
- Non recursive perft() by Steven Edwards, CCC, August 24, 2014 » Iterative Search
- OpenCL perft() Technical Issues by Steven Edwards, CCC, August 26, 2014 » OpenCL
- Escape from the Unix Cosmic Background Radiation by Steven Edwards, CCC, September 23, 2014
- The upcoming Y2038 catastrophe by Steven Edwards, CCC, September 25, 2014 » Mac OS
2015 …
- Perft(14) Weekly Status Reports for 2015 by Steven Edwards, CCC, January 04, 2015 » Perft, Perft Results
- Thread count limits and core counts by Steven Edwards, CCC, March 22, 2015
- Pi64: Raspberry Pi 2B 64 element bramble by Steven Edwards, CCC, April 05, 2015 » Raspberry Pi 2
- Thread synchronization questions for experts by Steven Edwards, CCC, April 21, 2015 » Symbolic, Thread
- Polling standard input from C++ by Steven Edwards, CCC, May 10, 2015
- A Nice routine by Steven Edwards, CCC, May 12, 2015
- Revised source for the random game generator by Steven Edwards, CCC, May 12, 2015
- Pre-announcement: Oscar Chess Library by Steven Edwards, CCC, September 01, 2015
- Perft(14) Weekly Status Reports for 2016 by Steven Edwards, CCC, December 29, 2015 » Perft, Perft Results
2016
- Relay based chess computing by Steven Edwards, CCC, May 03, 2016 » Electro-Mechanical
- Just a moment of your time, please by Steven Edwards, CCC, August 16, 2016
- Two perft(7) mismatches from work unit 571 by Steven Edwards, CCC, September 04, 2016
- Steven Edwards RIP… by Steve Maughan, CCC, November 10, 2016
Downloads
External Links
- A Computer Chess Analysis Interchange Format by Dick Lipton and Ken Regan, Gödel’s Lost Letter and P=NP, January 20, 2015
References
- ↑ Obituary For: Steven James Edwards | Kent & Pelczar Funeral Home
- ↑ Portable Game Notation Specification and Implementation Guide
- ↑ How common is Common Lisp? by Steven Edwards, CCC, August 2, 2008
- ↑ CIL Toolkit: code snippets: move generation by Steven Edwards, CCC, August 19, 2008
- ↑ ChessLisp for everyone! by Steven Edwards, CCC, July 22, 2010
- ↑ Myopic, a new Creative Commons chess program by Steven Edwards, CCC, May 22, 2010
- ↑ CookieCat Monday release schedule by Steven Edwards, CCC, December 19, 2011
- ↑ For a limited time, two sources by Steven Edwards, CCC, January 22, 2013
- ↑ A048987 from On-Line Encyclopedia of Integer Sequences (OEIS)
- ↑ James Edwards Obituary - Fremont, New Hampshire | Legacy.com
- ↑ Just a moment of your time, please by Steven Edwards, CCC, August 16, 2016
- ↑ ICGA Reference Database
- ↑ Wilhelm Barth (1995). Combining Knowledge and Search to Yield Infallible Endgame Programs A study of passed Pawns in the KPKP endgame. ICCA Journal, Vol. 18, No. 3
- ↑ Written in Cobol - Program Written as Chess Buff’s Research Aid by Brad Schultz, Computerworld, April 17, 1978, Page 37
- ↑ A018214 - OEIS | Alkane (or paraffin) numbers
- ↑ Courtesy Steven Edwards