Changes

[[Cray Blitz]] applied a special draw heuristic, not uniformly using zero as draw score, but rather zero plus the [[Ply|ply]] distance to the [[Root|root]] to prefer later draws rather than a draw now. Additionally, the draw score range is disjoint from [[Evaluation|evaluation]] scores, which then exclude values around zero by adding or subtracting appropriate offsets if either greater or equal, or less than zero <ref>[[Harry Nelson]], [[Robert Hyatt]] ('''1988'''). ''The Draw Heuristic of Cray Blitz''. [[ICGA Journal#11_1|ICCA Journal]], Vol. 11, No. 1, pp. 3-9.]]</ref>.

* [[David Slate]] ('''1984'''). ''Interior-node Score Bounds in a Brute-force Chess Program.'' [[ICGA Journal#7_4|ICCA Journal]], Vol. 7, No. 4, pp. 184-192]]* [[Harry Nelson]], [[Robert Hyatt]] ('''1988'''). ''The Draw Heuristic of Cray Blitz''. [[ICGA Journal#11_1|ICCA Journal]], Vol. 11, No. 1, pp. 3-9. ]]* [[Ernst A. Heinz]] ('''1998''') ''[http://people.csail.mit.edu/heinz/dt/node33.html Efficient Interior-Node Recognition]''. [[ICGA Journal#21_3|ICCA Journal]], Vol. 21, No. 3, pp. 156-167]]