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'''Rook''',<br/>
a chess program by [[Lars Karlsson]] written in [[Z80]] [[Assembly|assembly]] for the ''Data Board 4680'' card computer <ref>[https://dflund.se/~triad/diab/db4680.html Data Board 4680]</ref> <ref>[http://abc80databasen.blinkenshell.org/scan/DataBoard.4680.sida.1.JPG DataBoard.4680.sida.1.JPG] from [http://abc80databasen.blinkenshell.org/Scanningar.html abc80databasen.blinkenshell.org/Scanningar]</ref>and subsequently the [https://en.wikipedia.org/wiki/ABC_80 ABC 80], produced by [https://en.wikipedia.org/wiki/Dataindustrier_AB Dataindustrier AB], the company founded in 1970 by Karlsson himself <ref>[https://dflund.se/~triad/diab/ Historien om DIAB - Dataindustrier AB] (Swedish)</ref>.
Rook is a typical [[Type A Strategy|Shannon Type A]] program, performing [[Alpha-Beta]] with focus on the [[Killer Heuristic|Killer heuristic]].
With respectful 3 out of 5 and a shared third place Rook '''4.0''' had its strong debut at the [[WMCCC 1980]] in [https://en.wikipedia.org/wiki/London London].
During the 1981 [https://en.wikipedia.org/wiki/CeBIT CeBIT] fair in [https://en.wikipedia.org/wiki/Hanover Hanover], Germany, where [https://en.wikipedia.org/wiki/Boris_Spassky Boris Spassky] gave a [https://en.wikipedia.org/wiki/Simultaneous_exhibition simultaneous exhibition], one participant was Rook '''4.5''', which lost its game like most others of 25, except three who drew <ref>[https://www.computerwoche.de/a/softwarehaus-mbp-arrangierte-match-gegen-den-computer-schach-mikro-fuer-boris-spasskij-kein-problem,1186042 Softwarehaus mbp arrangierte Match gegen den Computer:Schach-Mikro für Boris Spasskij kein Problem], April 24, 1981, [[Computerworld#Woche|Computerwoche]] 17/1981 (German)</ref>.
=Quotes=
from an interview in [https://en.wikipedia.org/wiki/MikroDatorn MikroDatorn], January 1981 <ref>[https://www.idg.se/2.10186/1.354495/vem-ar-den-dar-karlsson Vem är den där Karlsson? - IDG.se], November 21, 2010 (Swedish) Interview with Lars Karlsson, [https://en.wikipedia.org/wiki/MikroDatorn MikroDatorn], January 1981, [https://en.wikipedia.org/wiki/Google_Translate Google Translate]</ref>
What have you earned from your chess programs?
Attention, maybe. The chess programs are a pure hobby business. It is interesting to do them because it requires that you know something about chess and know something about computers. Characteristic of my programs is that they imply a greater knowledge of computers than of chess. This is probably why I am now in the position that I have achieved a program that I can no longer beat myself.
=Selected Games=
* [https://www.game-ai-forum.org/icga-tournaments/program.php?id=460 Rook's ICGA Tournaments]
* [https://www.computerwoche.de/a/softwarehaus-mbp-arrangierte-match-gegen-den-computer-schach-mikro-fuer-boris-spasskij-kein-problem,1186042 Softwarehaus mbp arrangierte Match gegen den Computer:Schach-Mikro für Boris Spasskij kein Problem], April 24, 1981, [[Computerworld#Woche|Computerwoche]] 17/1981 (German)
* [https://www.idg.se/2.10186/1.354495/vem-ar-den-dar-karlsson Vem är den där Karlsson? - IDG.se], November 21, 2010 (Swedish) Interview with Lars Karlsson, [https://en.wikipedia.org/wiki/MikroDatorn MikroDatorn], January 1981
==Misc==
* [https://en.wikipedia.org/wiki/Rook Rook (disambiguation) from Wikipedia]
