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'''[[Main Page|Home]] * [[Engines]] * LL Chess'''
'''LL Chess''',<br/>
a chess program with focus on [[:Category:Problem|solving]] [[Checkmate|mates]], written by [[Leonid Liberman]] in [[x86]] [[Assembly|assembly]] to run under [[MS-DOS|DOS]],
last modified in May 2001, still in it's beta stage <ref>[http://www.theparticle.com/chess.html LL Chess Game - End of the World Production, LLC.]</ref>.
LL Chess represents the board as plain [[8x8 Board|8x8 mailbox]]. The [[Search|search]] uses several [[Brute-Force|brute-force]] and [[Selectivity|selective]] layers.
<span id="PointValues"></span>
=Positional Logic=
The so called positional logic, the logic of material exchange between the two sides takes following [[Point Value|point values]] into account, as given in Leonid's ''Chess Introduction'' <ref>[http://www.theparticle.com/chess000.html Chess Introduction] by [[Leonid Liberman]]</ref>.
{| class="wikitable"
|-
! Piece
! Score
|-
| Pawn
| style="text-align:right;" | 2000
|-
| Knight
| style="text-align:right;" | 4800
|-
| Bishop
| style="text-align:right;" | 4825
|-
| Rook
| style="text-align:right;" | 9100
|-
| Queen
| style="text-align:right;" | 18000
|-
| King
| style="text-align:right;" | 80000
|}
=Forum Posts=
* [https://www.stmintz.com/ccc/index.php?id=69483 Please, say in few words what can reduce the "branching factor"] by [[Leonid Liberman|Leonid]], [[CCC]], September 19, 1999 » [[Branching Factor]]
* [https://www.stmintz.com/ccc/index.php?id=69647 number of moves in position] by [[Leonid Liberman|Leonid]], [[CCC]], September 19, 1999
* [https://www.stmintz.com/ccc/index.php?id=86662 What is the q-search?] by [[Leonid Liberman|Leonid]], [[CCC]], January 07, 2000 » [[Quiescence Search]]
* [https://www.stmintz.com/ccc/index.php?id=104182 Branching factor, make me confuse more that ever] by [[Leonid Liberman|Leonid]], [[CCC]], April 01, 2000
* [https://www.stmintz.com/ccc/index.php?id=114696 What is the average nodes per second for minimax?] by [[Leonid Liberman|Leonid]], [[CCC]], June 15, 2000 » [[Nodes per second]]
* [https://www.stmintz.com/ccc/index.php?id=121111 Is the NPS tend to grow at the end of the game?] by [[Leonid Liberman|Leonid]], [[CCC]], July 22, 2000
* [http://www.talkchess.com/forum/viewtopic.php?t=56455 Remember Leonid Liberman (author of LLCHESS)?] by [[Dann Corbit]], [[CCC]], May 23, 2015
=External Links=
* [http://www.theparticle.com/chess.html LL Chess Game - End of the World Production, LLC.]
* [http://www.theparticle.com/chess000.html Chess Introduction] by [[Leonid Liberman]]
* [http://www.theparticle.com/chess001.html Procedure for finding the Check] by [[Leonid Liberman]]
* [http://www.theparticle.com/chess002.html New Ideas] by [[Leonid Liberman]]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:DosEngine]]
[[Category:Problem]]
'''LL Chess''',<br/>
a chess program with focus on [[:Category:Problem|solving]] [[Checkmate|mates]], written by [[Leonid Liberman]] in [[x86]] [[Assembly|assembly]] to run under [[MS-DOS|DOS]],
last modified in May 2001, still in it's beta stage <ref>[http://www.theparticle.com/chess.html LL Chess Game - End of the World Production, LLC.]</ref>.
LL Chess represents the board as plain [[8x8 Board|8x8 mailbox]]. The [[Search|search]] uses several [[Brute-Force|brute-force]] and [[Selectivity|selective]] layers.
<span id="PointValues"></span>
=Positional Logic=
The so called positional logic, the logic of material exchange between the two sides takes following [[Point Value|point values]] into account, as given in Leonid's ''Chess Introduction'' <ref>[http://www.theparticle.com/chess000.html Chess Introduction] by [[Leonid Liberman]]</ref>.
{| class="wikitable"
|-
! Piece
! Score
|-
| Pawn
| style="text-align:right;" | 2000
|-
| Knight
| style="text-align:right;" | 4800
|-
| Bishop
| style="text-align:right;" | 4825
|-
| Rook
| style="text-align:right;" | 9100
|-
| Queen
| style="text-align:right;" | 18000
|-
| King
| style="text-align:right;" | 80000
|}
=Forum Posts=
* [https://www.stmintz.com/ccc/index.php?id=69483 Please, say in few words what can reduce the "branching factor"] by [[Leonid Liberman|Leonid]], [[CCC]], September 19, 1999 » [[Branching Factor]]
* [https://www.stmintz.com/ccc/index.php?id=69647 number of moves in position] by [[Leonid Liberman|Leonid]], [[CCC]], September 19, 1999
* [https://www.stmintz.com/ccc/index.php?id=86662 What is the q-search?] by [[Leonid Liberman|Leonid]], [[CCC]], January 07, 2000 » [[Quiescence Search]]
* [https://www.stmintz.com/ccc/index.php?id=104182 Branching factor, make me confuse more that ever] by [[Leonid Liberman|Leonid]], [[CCC]], April 01, 2000
* [https://www.stmintz.com/ccc/index.php?id=114696 What is the average nodes per second for minimax?] by [[Leonid Liberman|Leonid]], [[CCC]], June 15, 2000 » [[Nodes per second]]
* [https://www.stmintz.com/ccc/index.php?id=121111 Is the NPS tend to grow at the end of the game?] by [[Leonid Liberman|Leonid]], [[CCC]], July 22, 2000
* [http://www.talkchess.com/forum/viewtopic.php?t=56455 Remember Leonid Liberman (author of LLCHESS)?] by [[Dann Corbit]], [[CCC]], May 23, 2015
=External Links=
* [http://www.theparticle.com/chess.html LL Chess Game - End of the World Production, LLC.]
* [http://www.theparticle.com/chess000.html Chess Introduction] by [[Leonid Liberman]]
* [http://www.theparticle.com/chess001.html Procedure for finding the Check] by [[Leonid Liberman]]
* [http://www.theparticle.com/chess002.html New Ideas] by [[Leonid Liberman]]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:DosEngine]]
[[Category:Problem]]
