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\F3\CSTANFORD, CALIFORNIA 94305
\F4ARTIFICIAL INTELLIGENCE LABORATORY\←L\-R\/'7;\+R\→.\→S   Telephone:
\←S\→.415-497-3330

\F1\CMarch 14, 1977




Mr. Jeff Loeb
618 North Lewis St.
River Falls, Wi. 54022


Dear Mr. Loeb:

\JThe checker playing program, to which you refered in your letter of Feb.
21st, is a very long one.  The listing is only available in the assembly
language for PDP-10 computer.  Unfortunately, the program is not well
enough commented to be of much use to any one who has not worked on it.

Because of its size,(several hundred pages) and the attended cost of
reproducing it, I do not make it a practice of supplying it to individuals
who can not make effective use of it.

If you have access to a PDP-10 computer and can program in the assembly
language for this machine, and if you are willing to bear the cost of
reproducing the listing, I will, of course, be only glad to reproduce it
for you.  The program has been distributed rather widely and a number of
people have adapted it to other machines and have made their own versions
of it.  Perhaps I should worn you that the program was developed primarily
as a research tool and it is not very well suited for use as a game to play
for fun.

I will send you a reprint of an early paper which discribes the program and if 
you are interested you can find a second paper in the November 1967 issue of
The IBM Journal of Research and Development (Vol. 11, No. 6, page 601-617).
Unfortunately, my supply of reprints for this second paper is exhausted.\.

\←L\→S\←R\-L\/'2;\+L\→L

Sincerely,






Arthur L. Samuel

\←S\→L


ALS:pdp10