Doctor?

**[[Home]] * [[Engines]] * Doctor?**
|| [[image:250px-Doctor_Who_2010_title.jpg link="https://en.wikipedia.org/wiki/Doctor_Who"]] ||~   || **Doctor?**,
is the commercial successor of [[Bobby|Bobby II]] by [[Hans-Joachim Kraas]] and [[Günther Schrüfer]]. It was market by [[ChessBase]] as 16-bit engine in 1995 as analysis engine for [[ChessBase (Database)|ChessBase/Windows 1.0]], and in 1998 as 32-bit add-on engine of the [[Fritz|Fritz 5.32]] package <ref>[[http://scleinzell.schachvereine.de/p_spielprogramme/fritz532.shtml|Fritz 5.32 - mehr als nur ein Update!]] by [[Peter Schreiner]] (German), [[http://scleinzell.schachvereine.de/home/news.shtml|Schachclub Leinzell]]</ref><ref>[[http://www.schachversand.de/d/detail/software/76.html|Doctor? 2.0 / Engine MacIntosh]] from [[Schachversand Niggemann]]</ref>. Doctor? was written in [[C]] and is therefor available for various hardware platforms and operating systems. ||
|| Doctor Who <ref>[[https://en.wikipedia.org/wiki/Doctor_Who|Doctor Who from Wikipedia]]</ref> ||~   ||^   ||
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=Program Characteristics= 
<ref>[[http://www.ajedrez-de-estilo.com.ar/int/Products/engines/doctor/index.htm|Doctor? by Dr. Hans-Joachim Kraas and Dr. Gunther Schrüfer]]</ref>
* STC-Search (solution tree cost oriented search) <ref>[[Günther Schrüfer]] (**1988**). //[[http://www.worldcat.org/oclc/246856479&referer=brief_results|Minimax-Suchen : Kosten, Qualität und Algorithmen]]//. Braunschweig : Technische Universität. (German)</ref>
* Ample chess knowledge in evaluation function and search heuristics.
* positional playing style with tactical surprises.
* written fully in C
* implemented on [[Atari ST]], [[IBM PC|PC]] ([[Unix]], Win3.x, Win95/98, WinNT), [[Macintosh|Mac]], [[Sun]], BiiN

=Forum Posts=
* [[http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/c22718e3e51ea313|Doctor module for Fritz/Chessbase?]] by  MLK and RJP, [[Computer Chess Forums|rgcc]], December 07, 1997
* [[http://www.talkchess.com/forum/viewtopic.php?t=27268|Doctor 3.0?]] by [[Swaminathan Natarajan]], [[CCC]], April 01, 2009

=External Links=
* [[http://www.ajedrez-de-estilo.com.ar/int/Products/engines/doctor/index.htm|Doctor? by Dr. Hans-Joachim Kraas and Dr. Gunther Schrüfer]]
* [[http://computerchess.org.uk/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=Doctor%203.0#Doctor_3_0|Doctor 3.0]] in [[CCRL|CCRL 40/4]]

=Refererences= 
<references />
=What links here?= 
[[include page="Doctor?" component="backlinks" limit="20" ]]
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