Doctor?

is the commercial successor of 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/Windows 1.0, and in 1998 as 32-bit add-on engine of the Fritz 5.32 package. Doctor? was written in C and is therefor available for various hardware platforms and operating systems. || toc =Program Characteristics=
 * Home * Engines * Doctor?**
 * [[image:250px-Doctor_Who_2010_title.jpg link="https://en.wikipedia.org/wiki/Doctor_Who"]] ||~  || **Doctor?**,
 * Doctor Who ||~  ||^   ||
 * STC-Search (solution tree cost oriented search)
 * Ample chess knowledge in evaluation function and search heuristics.
 * positional playing style with tactical surprises.
 * written fully in C
 * implemented on Atari ST, PC (Unix, Win3.x, Win95/98, WinNT), Mac, Sun, BiiN

=Forum Posts=
 * [|Doctor module for Fritz/Chessbase?] by MLK and RJP, rgcc, December 07, 1997
 * [|Doctor 3.0?] by Swaminathan Natarajan, CCC, April 01, 2009

=External Links=
 * [|Doctor? by Dr. Hans-Joachim Kraas and Dr. Gunther Schrüfer]
 * [|Doctor 3.0] in CCRL 40/4

=Refererences= =What links here?= include page="Doctor?" component="backlinks" limit="20"
 * Up one Level**