• Queen of Spades is free software and you are encouraged to use, copy, modify, and distribute both the program and its documentation (here is the documentation in html 3.2 format, or you can view the corresponding pdf file (270 KBytes)).


• If you ever need to reference this program in your publications (but note that you are not required -at least by me- to do so), please use the following citation : Glykos, N.M. & Kokkinidis, M. (2000), "A stochastic approach to Molecular Replacement", Acta Crystallogr., D56, 169-174.
  Electronic reprint (415 KBytes) : Local copy, or directly from Acta Cryst. D56, 169-174, Copyright © International Union of Crystallography.
  

Click here to download the compressed archive : Qs.tar.gz (2.0 MBytes). Contains source code, documentation, example scripts, test files and stand-alone executable images suitable for Irix, Linux, DEC VMS and Windows.

VMS users will need recent versions of gunzip and vmstar to unpack the distribution.
Windows users will need 7Zip or something with a similar functionality.

Once you downloaded the file -and if you have a Unix machine-, do :

In the case of VMS (and depending on how your browser saved the file), do :

Windows users will have to start their 7Zip-like program and follow the instructions for unpacking the distribution.

Once you unpacked the archive, go to the Qs directory and follow the instructions in the README file.

If you are determined to rot your mind (through reading), there are three other closely related papers on the subject (apart from the main reference) : the first is more theoretical, the second reports the practical application of the method to a 23-dimensional problem, while the third describes the multi-model features of the program. Very recently a parallel version of the program became available and this is described here.