Leonid Liberman

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Leonid Liberman, a Canadian chess programmer and author of LL Chess , famous for posting turbulent mate in N positions in CCC, forcing many engines to "explode" even in quiescence search. In his publications on computer chess from the mid 90s, hosted by End of the World Production, LLC. , he elaborates on x86 assembly, board representation, piece coding and move generation, mate solving, and point values.

=Forum Posts=

1999

 * nodes per ply by Leonid, CCC, June 10, 1999
 * hardware of Cray Blitz by Leonid, CCC, June 13, 1999 » Cray Blitz
 * Do you know something about INTEL 64 bits CPU? by Leonid, CCC, June 15, 1999
 * How really strong is ChessMaster 6000? by Leonid, CCC, July 03, 1999 » Chessmaster
 * Brute force base of good game. True or not true? by Leonid, CCC, September 07, 1999 » Brute-Force
 * What is the History table? by Leonid, CCC, September 15, 1999 » History Heuristic
 * Please, say in few words what can reduce the "branching factor" by Leonid, CCC, September 19, 1999 » Branching Factor
 * number of moves in position by Leonid, CCC, September 19, 1999
 * Re: number of moves in position by Leonid, CCC, September 21, 1999


 * Do have the Crafty the Assembler written core? by Leonid, CCC, November 01, 1999 » Crafty
 * Do you use illigal moves in the ply zero and 1? by Leonid, CCC, November 22, 1999
 * What will be the position of Windows in 3, 4 years in the future? by Leonid, CCC, November 29, 1999 » Windows
 * What chess projects we have in the States? by Leonid, CCC, December 04, 1999
 * How many plies in chess game before hash table have some sense? by Leonid, CCC, December 08, 1999

2000

 * What is the q-search? by Leonid, CCC, January 07, 2000 » Quiescence Search
 * What is the use of extensions? by Leonid, CCC, January 09, 2000 » Extensions
 * Mate in ...? by Leonid, CCC, February 12, 2000
 * Branching factor, make me confuse more that ever by Leonid, CCC, April 01, 2000
 * What is the average nodes per second for minimax? by Leonid, CCC, June 15, 2000 » Nodes per second
 * Is the NPS for minimax devided by NPS in alpha-beta = 5 ? by Leonid, CCC, June 16, 2000
 * Is the NPS tend to grow at the end of the game? by Leonid, CCC, July 22, 2000
 * How make Fritz execute brute force search? by Leonid, CCC, July 26, 2000 » Fritz
 * Junior chess program. Just version of Fritz 5? by Leonid, CCC, July 29, 2000 » Junior
 * How do your program search of all plys? Identical way? by Leonid, CCC, August 03, 2000
 * Attempt to understand Leonids nomenclature... by Andrew Dados, CCC, August 04, 2000
 * Two mate positions to solve by Leonid, CCC, September 02, 2000
 * Two mate position to solve by Leonid, CCC, September 06, 2000

2001
January February March April May June July 
 * What shortest mate that you can find for this position? by Leonid, CCC, January 17, 2001
 * If you like to find a mate... by Leonid, CCC, January 18, 2001
 * If you want solve one mate... by Leonid, CCC, January 21, 2001
 * One easy mate to solve... by Leonid, CCC, January 22, 2001
 * One average mate position... by Leonid, CCC, January 23, 2001
 * If you like to solve easy forced mate... by Leonid, CCC, January 24, 2001
 * If you like to solve average mate position... by Leonid, CCC, January 25, 2001
 * If you like to solve real mate... by Leonid, CCC, January 27, 2001
 * If you like to solve mate from real game... by Leonid, CCC, January 28, 2001
 * If you like forced mate... by Leonid, CCC, January 30, 2001
 * Forced mate position to solve... by Leonid, CCC, January 31, 2001
 * If you like to solve a mate... by Leonid, CCC, February 01, 2001
 * Forced mate so solve... by Leonid, CCC, February 05, 2001
 * If you like to solve easy mate... by Leonid, CCC, February 08, 2001
 * If you like to solve a mate... by Leonid, CCC, February 09, 2001
 * If you like to crush easy mate... by Leonid, CCC, February 10, 2001
 * If you like to solve mate for light position... by Leonid, CCC, February 11, 2001
 * If you like to solve mate... by Leonid, CCC, February 14, 2001
 * If you like solving forced mate... by Leonid, CCC, February 15, 2001
 * If you like to solve one easy mate... by Leonid, CCC, February 16, 2001
 * Easy mate to solve... by Leonid, CCC, March 04, 2001
 * If you like to sove a mate... by Leonid, CCC, March 10, 2001
 * If you are ready to solve one mate... by Leonid, CCC, April 11, 2001
 * If you like easy mate... by Leonid, CCC, April 12, 2001
 * If you want to solve one mate... by Leonid, CCC, April 14, 2001
 * If you enjoy like me solving mates... by Leonid, CCC, April 16, 2001
 * Mate that every program will solve... by Leonid, CCC, April 17, 2001
 * One mate to solve... by Leonid, CCC, April 22, 2001
 * Mate to solve... by Leonid, CCC, April 23, 2001
 * Mate that every program will find by Leonid, CCC, April 26, 2001
 * Mate to solve for champions... by Leonid, CCC, April 29, 2001
 * One mate to solve for fittest programs by Leonid, CCC, May 04, 2001
 * Very easy mate to solve by Leonid, CCC, May 05, 2001
 * One mate to solve... by Leonid, CCC, May 06, 2001
 * Mate to solve in two flavous by Leonid, CCC, May 07, 2001
 * One mate to solve... by Leonid, CCC, May 08, 2001
 * One mate to solve... by Leonid, CCC, May 15, 2001
 * One very easy mate to solve by Leonid, CCC, May 21, 2001
 * One mate to solve... by Leonid, CCC, May 30, 2001
 * One mate to solve... by Leonid, CCC, June 02, 2001
 * Mate to solve for good program by Leonid, CCC, June 07, 2001
 * One mate to solve for Champion! by Leonid, CCC, June 16, 2001
 * One mate to solve by Leonid, CCC, July 17, 2001
 * One mate to sove for Champions! by Leonid, CCC, September 02, 2001
 * One mate to solve for Champions! by Leonid, CCC, October 02, 2001
 * A mate for Leonid by Sven Reichard, CCC, October 10, 2001
 * Try this mate by Leonid, CCC, October 16, 2001
 * Try solve this mate by Leonid, CCC, October 21, 2001
 * Try this moderate mate by Leonid, CCC, October 27, 2001
 * One easy mate by Leonid, CCC, November 04, 2001
 * Very easy mate to solve by Leonid, CCC, December 22, 2001

2002

 * Where is now 64 bits Intel's computer? by Leonid, CCC, May 11, 2002
 * Find a mate by Leonid, CCC, August 03, 2002
 * One mate in 10 to solve by Leonid, CCC, August 10, 2002
 * One mate in 11 by Leonid, CCC, September 07, 2002
 * Try to solve mate by Leonid, CCC, September 14, 2002
 * What is the future for Linux? by Leonid, CCC, October 03, 2002 » Linux
 * What new chip will come in the next year? by Leonid, CCC, November 06, 2002

2003

 * Where are 64 bits machine? by Leonid, CCC, March 17, 2003
 * Mate slightly harder by Leonid, CCC, August 25, 2003
 * Mate that should be easy by Leonid, CCC, October 19, 2003
 * Heavy mate position but easy to solve by Leonid, CCC, October 20, 2003
 * Mate to torture by Leonid, CCC, November 02, 2003
 * Try very easy mate by Leonid, CCC, November 04, 2003
 * Try to solve very populated mate by Leonid, CCC, November 05, 2003
 * Very easy mate by Leonid, CCC, November 06, 2003

2005 ...

 * Seeking for Leonid mates by Matthias Gemuh, CCC, May 09, 2005
 * Leonid's Megapage by AGove, CCC, July 20, 2007

2010 ...

 * Leonid Chess Megapage by kirchner, Immortal Chess Forum, August 10, 2012
 * Remember Leonid Liberman (author of LLCHESS)? by Dann Corbit, CCC, May 23, 2015

=External Links=
 * LL Chess Game - End of the World Production, LLC.
 * Inevitable Mate Positions by Leonid Liberman
 * Chess Introduction by Leonid Liberman
 * Procedure for finding the Check by Leonid Liberman
 * New Ideas by Leonid Liberman

=References= Up one level