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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 [1][2]. Doctor? was written in C and is therefor available for various hardware platforms and operating systems.
Doctor Who [3]

Program Characteristics

  • STC-Search (solution tree cost oriented search) [5]
  • 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

External Links


  1. ^ Fritz 5.32 - mehr als nur ein Update! by Peter Schreiner (German), Schachclub Leinzell
  2. ^ Doctor? 2.0 / Engine MacIntosh from Schachversand Niggemann
  3. ^ Doctor Who from Wikipedia
  4. ^ Doctor? by Dr. Hans-Joachim Kraas and Dr. Gunther Schrüfer
  5. ^ Günther Schrüfer (1988). Minimax-Suchen : Kosten, Qualität und Algorithmen. Braunschweig : Technische Universität. (German)

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