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SATURDAY 20 JUNE 1970
171st day - 194 days to come

Jim Dunnigan called. They lost the diagram for COMBINATION. Jim gave
me Red Simenson's phone number and I called him later and
dictated it to him. (Red's number - LO7 - 6255.)
Made date for Jim to come over Thursday, July 2.

Called Martin Gardner.
Asked him if he was familiar with ENIGMA (See 6/4). Yes. It was completely devoted to word puzzles, and not
very interesting ones.
Martin asked me if I was familiar with the book
SERIOUS GAMES. I have it.
Martin told me of a book put out by
{Foreign Policy Association
{345 E. 46th St.
{New York, N.Y. 10017
SIMULATION GAMES FOR THE SOCIAL STUDIES CLASSROOM
(1968 - 4th printing 1970, with expanded references & bibliography)
This is #1 in their ?New Dimensions Series."
The price is $1.00 plus postage. ($1.25 should be O.K.)
Martin told me more about QUADROPHAGE (SQUARE EATER).
With 4 pcs. per turn the single pc. can be captured on a 5 x 5 field.
With 3 " " " " " " " " " " " 6 x 6 " .
With 2 " " " " " " " " " " " 8 x 8 " .
With 1 pc. " " " " " " " " " " 33 x 33 " .
(The last item was discovered by a scientist at Bell Laboratories,
using a computer.)

Working on game diary the rest of the day.