Changes

Their 1989 ICCA paper was criticized by [[Jonathan Schaeffer]] <ref>[[Jonathan Schaeffer]] ('''1989'''). ''Comment on `Distributed Game-Tree Search'.'' [[ICGA Journal#12_4|ICCA Journal, Vol. 12, No. 4]], pp. 216-217</ref>, first on the speedup topic of about eleven on a 16-processor machine not mentioning that parallel speedup is tied to the (in)efficiency of the serial alpha-beta search, and further, on ignoring other work recently done in the field. The YBWC presented was similar to the methods used in the chess programs [[Cray Blitz]] <ref>[[Robert Hyatt]] ('''1988'''). ''A High-Performance Parallel Algorithm to Search Depth-First Game Trees''. Ph.D. Thesis, Department of Computer Science, [[University of Alabama at Birmingham]]</ref>, [[Lachex]], and [[Phoenix|Para-Phoenix]] <ref>[[Jonathan Schaeffer]] ('''1986'''). ''Improved Parallel Alpha-Beta Searching''. Proceedings ACM/IEEE Fall Joint Computer Conference, pp. 519-527.</ref> <ref>[[Jonathan Schaeffer]] ('''1989'''). ''Distributed Game-Tree Searching''. Journal of Parallel and Distributed Computing, Vol. 6, No. 2, pp. 90-114. ISSN 0743-7315</ref>. In a response, Feldmann et al. agreed that the behavior of a parallelization should be measured relative to the "best" sequential program. However, the speedup depends on many implementation details such as those about the hardware, communication mechanism, load-balancing capabilities, etc., which cannot be described in a short paper. The authors further state that chess programs were not the main research vehicle, but the algorithm, which was the reason for not quoting all the chess specific papers <ref>[[Rainer Feldmann]], [[Burkhard Monien]], [[Peter Mysliwietz]], [[Oliver Vornberger]] ('''1990'''). ''Response to a Comment on 'Distributed Game-Tree Search'''. [[ICGA Journal#13_1|ICCA Journal, Vol. 13, No. 1]], pp. 20-21</ref>.

* [[Jonathan Schaeffer]] ('''1989'''). ''Comment on 'Distributed Game-Tree Search'''. [[ICGA Journal#12_4|ICCA Journal, Vol. 12, No. 4]]

* [[Rainer Feldmann]], [[Burkhard Monien]], [[Peter Mysliwietz]], [[Oliver Vornberger]] ('''1990'''). ''Response to a Comment on 'Distributed Game-Tree Search'''. [[ICGA Journal#13_1|ICCA Journal, Vol. 13, No. 1]]