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CHEKMO-II - Revision history
2024-03-29T12:34:17Z
Revision history for this page on the wiki
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https://www.chessprogramming.org/index.php?title=CHEKMO-II&diff=16664&oldid=prev
GerdIsenberg at 18:57, 27 December 2019
2019-12-27T18:57:49Z
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''[[Engines|Up one level]]'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''[[Engines|Up one level]]'''</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:PDP-8]]</ins></div></td></tr>
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GerdIsenberg
https://www.chessprogramming.org/index.php?title=CHEKMO-II&diff=6203&oldid=prev
GerdIsenberg at 16:08, 21 August 2018
2018-08-21T16:08:14Z
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 16:08, 21 August 2018</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.pdp8.net/games/chess.shtml PDP-8 Chess (CHEKMO-II) Instructions] <ref>[http://www.technikum29.de/de/lernprojekte/schach/Chekmo%20II%20%28deutsch,%20ungekuerzt%29.pdf CHEKMO-II German manual] (pdf)</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.pdp8.net/games/chess.shtml PDP-8 Chess (CHEKMO-II) Instructions] <ref>[http://www.technikum29.de/de/lernprojekte/schach/Chekmo%20II%20%28deutsch,%20ungekuerzt%29.pdf CHEKMO-II German manual] (pdf)</ref></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.pdp8.net/pdp8cgi/os8_html/CHEKMO.PA?act=file;fn=images/misc_dectapes/chekmo_misc.tu56;blk=121,252,0;to=auto File CHEKMO.PA (PAL assembler source file)]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.pdp8.net/pdp8cgi/os8_html/CHEKMO.PA?act=file;fn=images/misc_dectapes/chekmo_misc.tu56;blk=121,252,0;to=auto File CHEKMO.PA (PAL assembler source file)]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [https://github.com/okalachev/chekmo GitHub - okalachev/chekmo: 1970’s chess engine CHEKMO-II + UCI adapter]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://members.aon.at/nkehrer/pdp8.html Norbert's Emulators | The Atari PDP-8 Emulator | b) Chess program CHEKMO-II]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://members.aon.at/nkehrer/pdp8.html Norbert's Emulators | The Atari PDP-8 Emulator | b) Chess program CHEKMO-II]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://web.archive.org/web/20071221115817/http://classicchess.googlepages.com/Chess.htm Classic Computer Chess - ... The programs of yesteryear] by [[Carey Bloodworth|Carey]], hosted by the [https://en.wikipedia.org/wiki/Internet_Archive Internet Archive] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=56938&start=2 Re: Old programs CHAOS and USC] by [[Dann Corbit]], [[CCC]], July 11, 2015</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://web.archive.org/web/20071221115817/http://classicchess.googlepages.com/Chess.htm Classic Computer Chess - ... The programs of yesteryear] by [[Carey Bloodworth|Carey]], hosted by the [https://en.wikipedia.org/wiki/Internet_Archive Internet Archive] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=56938&start=2 Re: Old programs CHAOS and USC] by [[Dann Corbit]], [[CCC]], July 11, 2015</ref></div></td></tr>
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GerdIsenberg
https://www.chessprogramming.org/index.php?title=CHEKMO-II&diff=6196&oldid=prev
GerdIsenberg at 15:10, 21 August 2018
2018-08-21T15:10:33Z
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''CHEKMO-II''', (CheckMo-II)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''CHEKMO-II''', (CheckMo-II)</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>the ''classical'' chess program for the [[PDP-8]], written  in the 70s by [[Digital Equipment Corporation]] instructor [[John E. Comeau]] in PAL-8, the PDP-8 [[Assembly|assembly]].  </div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>the ''classical'' chess program for the [[PDP-8]], written  in the 70s by [[Digital Equipment Corporation]] instructor [[John E. Comeau]] in PAL-8, the PDP-8 [[Assembly|assembly]] <ins class="diffchange diffchange-inline"><ref>[http://www.pdp8.net/pdp8cgi/os8_html/CHEKMO.PA?act=file;fn=images/misc_dectapes/chekmo_misc.tu56;blk=121,252,0;to=auto File CHEKMO.PA (PAL assembler source file)]</ref></ins>.  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=Abstract=</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=Abstract=</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=External Links=</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=External Links=</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.pdp8.net/games/chess.shtml PDP-8 Chess (CHEKMO-II) Instructions] <ref>[http://www.technikum29.de/de/lernprojekte/schach/Chekmo%20II%20%28deutsch,%20ungekuerzt%29.pdf CHEKMO-II German manual] (pdf)</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.pdp8.net/games/chess.shtml PDP-8 Chess (CHEKMO-II) Instructions] <ref>[http://www.technikum29.de/de/lernprojekte/schach/Chekmo%20II%20%28deutsch,%20ungekuerzt%29.pdf CHEKMO-II German manual] (pdf)</ref></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [http://www.pdp8.net/pdp8cgi/os8_html/CHEKMO.PA?act=file;fn=images/misc_dectapes/chekmo_misc.tu56;blk=121,252,0;to=auto File CHEKMO.PA (PAL assembler source file)]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://members.aon.at/nkehrer/pdp8.html Norbert's Emulators | The Atari PDP-8 Emulator | b) Chess program CHEKMO-II]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://members.aon.at/nkehrer/pdp8.html Norbert's Emulators | The Atari PDP-8 Emulator | b) Chess program CHEKMO-II]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://web.archive.org/web/20071221115817/http://classicchess.googlepages.com/Chess.htm Classic Computer Chess - ... The programs of yesteryear] by [[Carey Bloodworth|Carey]], hosted by the [https://en.wikipedia.org/wiki/Internet_Archive Internet Archive] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=56938&start=2 Re: Old programs CHAOS and USC] by [[Dann Corbit]], [[CCC]], July 11, 2015</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://web.archive.org/web/20071221115817/http://classicchess.googlepages.com/Chess.htm Classic Computer Chess - ... The programs of yesteryear] by [[Carey Bloodworth|Carey]], hosted by the [https://en.wikipedia.org/wiki/Internet_Archive Internet Archive] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=56938&start=2 Re: Old programs CHAOS and USC] by [[Dann Corbit]], [[CCC]], July 11, 2015</ref></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''[[Engines|Up one level]]'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''[[Engines|Up one level]]'''</div></td></tr>
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GerdIsenberg
https://www.chessprogramming.org/index.php?title=CHEKMO-II&diff=6188&oldid=prev
GerdIsenberg: Created page with "'''Home * Engines * CHEKMO-II''' FILE:checkmo-II.jpg|border|right|thumb|link=https://www.youtube.com/watch?time_continue=7&v=Rp4HIC1crS0| CHEKMO-II' <ref>..."
2018-08-20T20:04:35Z
<p>Created page with "'''<a href="/Main_Page" title="Main Page">Home</a> * <a href="/Engines" title="Engines">Engines</a> * CHEKMO-II''' FILE:checkmo-II.jpg|border|right|thumb|link=https://www.youtube.com/watch?time_continue=7&v=Rp4HIC1crS0| CHEKMO-II' <ref>..."</p>
<p><b>New page</b></p><div>'''[[Main Page|Home]] * [[Engines]] * CHEKMO-II'''<br />
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[[FILE:checkmo-II.jpg|border|right|thumb|link=https://www.youtube.com/watch?time_continue=7&v=Rp4HIC1crS0| CHEKMO-II' <ref>Image clipped from the [https://www.youtube.com/watch?time_continue=7&v=Rp4HIC1crS0 video] from [http://members.aon.at/nkehrer/pdp8.html Norbert's Emulators | The Atari PDP-8 Emulator | b) Chess program CHEKMO-II]</ref> ]] <br />
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<br />
'''CHEKMO-II''', (CheckMo-II)<br />
the ''classical'' chess program for the [[PDP-8]], written in the 70s by [[Digital Equipment Corporation]] instructor [[John E. Comeau]] in PAL-8, the PDP-8 [[Assembly|assembly]]. <br />
<br />
=Abstract=<br />
<ref>[http://www.bitsavers.org/pdf/dec/decus/programCatalogs/DECUS_Catalog_PDP-8_Aug78.pdf DECUS Program Library PDP-8 Catalog 1978] (pdf)</ref> <ref>[http://www.pdp8.net/games/chess.shtml PDP-8 Chess (CHEKMO-II) Instructions]</ref>: <br />
CHEKMO-II is a chess playing program which will run on any PDP-8 family computer. The program will play either the white pieces or the black pieces, and will play and accept all classes of legal moves, including [[Castling|castling]] both short and long, [[En passant|en passant]] pawn captures, and [[Promotions|pawn promoting moves]] to any legal promotion piece. The program prints out its moves in [[Algebraic Chess Notation|Algebraic Notation]], and [[Entering Moves|accepts moves]] using Algebraic Notation. Included in the command structure of the program are commands which allow you to input board positions using [[Forsyth-Edwards Notation|Forsyth Notation]], and get a printout of the board at your terminal. <br />
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=Known Deficiencies=<br />
<ref>[http://www.pdp8.net/games/chess.shtml PDP-8 Chess (CHEKMO-II) Instructions]</ref><br />
CHEKMO-II has been programmed to use the same strategy [[Game Phases|throughout the game]]. This strategy has been optimized for good play in the [[Middlegame]], and [[Opening]]. As a result CHEKMO-II plays poor moves in some [[Endgame]] positions.<br />
<br />
If either the white side or the black side becomes significantly more powerful than the other (about 4 queens) CHEKMO-II may play some strange, but legal moves. This is caused by overflow in an internal evaluator routine. <br />
<br />
=See also=<br />
* [[QCHESS]]<br />
<br />
=Forum Posts=<br />
* [http://groups.google.com/group/alt.sys.pdp8/msg/9b7216d805221f92 More PDP-8 Software Donated to the RICM] by Klemens Krause, [http://groups.google.com/group/alt.sys.pdp8/topics alt.sys.pdp8], July 5, 2011<br />
<br />
=External Links=<br />
* [http://www.pdp8.net/games/chess.shtml PDP-8 Chess (CHEKMO-II) Instructions] <ref>[http://www.technikum29.de/de/lernprojekte/schach/Chekmo%20II%20%28deutsch,%20ungekuerzt%29.pdf CHEKMO-II German manual] (pdf)</ref><br />
* [http://members.aon.at/nkehrer/pdp8.html Norbert's Emulators | The Atari PDP-8 Emulator | b) Chess program CHEKMO-II]<br />
* [http://web.archive.org/web/20071221115817/http://classicchess.googlepages.com/Chess.htm Classic Computer Chess - ... The programs of yesteryear] by [[Carey Bloodworth|Carey]], hosted by the [https://en.wikipedia.org/wiki/Internet_Archive Internet Archive] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=56938&start=2 Re: Old programs CHAOS and USC] by [[Dann Corbit]], [[CCC]], July 11, 2015</ref><br />
* <span id="PDP8"></span>[[PDP-8]] - Presentation No. 3, [https://en.wikipedia.org/wiki/The_National_Museum_of_Computing The National Museum of Computing], [https://en.wikipedia.org/wiki/YouTube YouTube] Video<br />
: {{#evu:https://www.youtube.com/watch?v=OyDufWHsNVE|alignment=left|valignment=top}}<br />
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=References= <br />
<references /><br />
'''[[Engines|Up one level]]'''</div>
GerdIsenberg