LL Chess,
a chess program with focus on solving mates, written by Leonid Liberman in x86 assembly to run under DOS, last modified in May 2001, still in it's beta stage 1. LL Chess represents the board as plain 8x8 mailbox. The search uses several brute-force and selective layers.
Positional Logic
The so called positional logic, the logic of material exchange between the two sides takes following point values into account, as given in Leonid's Chess Introduction 2.
| Piece | Score |
|---|---|
| Pawn | 2000 |
| Knight | 4800 |
| Bishop | 4825 |
| Rook | 9100 |
| Queen | 18000 |
| King | 80000 |
Forum Posts
- 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
- What is the q-search? by Leonid, CCC, January 07, 2000 » Quiescence Search
- 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 tend to grow at the end of the game? by Leonid, CCC, July 22, 2000
- Remember Leonid Liberman (author of LLCHESS)? by Dann Corbit, CCC, May 23, 2015
External Links
- LL Chess Game - End of the World Production, LLC.
- Chess Introduction by Leonid Liberman
- Procedure for finding the Check by Leonid Liberman
- New Ideas by Leonid Liberman