References

[B]     J. D. Beasely,  The Mathematics of Games, Oxford University Press, Oxford, 1989.

[D]     N.J. Divinsky, The Chess Encyclopedia, Facts on File, New York, 1990.

[E1]   A. E. Elo,  The Rating of Chessplayers, Past and Present, Arco, New York, 1987.

[E2]        -          "The International Chess Federation Rating System,"

                            Chess, Sutton-Coldfield, July, August, October, 1973.

[G]     M. Gardner, The Colossal Book of Mathematics, W. W. Norton, New York, 2001.

[GJ]   M.  R. Garey and D. S. Johnson,

                           Computers and Intractability:  A Guide to the Theory of NP-Completeness,

                           Freeman, New York, 1967.