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'''[[ACM 1972|< Prev]] [[ACM 1974|Next >]]'''
[[FILE:Hyatt-regency-atlanta-side.jpg|border|right|thumb| Hyatt Regency Atlanta <ref>View of the [https://en.wikipedia.org/wiki/Hyatt_Regency_Atlanta Hyatt Regency Atlanta] from the [https://en.wikipedia.org/wiki/Atlanta_Marriott_Marquis Marriott Marquis], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons], November 04, 2007, by [https://en.wikipedia.org/wiki/User:Connor.carey Connor.carey], [https://en.wikipedia.org/wiki/Hyatt_Regency_Atlanta Hyatt Regency Atlanta from Wikipedia]</ref> ]]
The [[ACM|ACM's]] '''Fourth North American Computer Chess Championship''' (NACCC) was held from August 26 to 28, [[Timeline#1973|1973]] at the [https://en.wikipedia.org/wiki/Hyatt_Regency_Atlanta Hyatt Regency Hotel], [https://en.wikipedia.org/wiki/Atlanta%2C_Georgia Atlanta], [https://en.wikipedia.org/wiki/Georgia_%28U.S._state%29 Georgia], USA.
| [[Ga Tech CP]]
| [[Lawrence Futrell]]
| [https://en.wikipedia.org/wiki/Burroughs_large_systems#B5000 [Burroughs B-5500]]
|
|-
=The Tournament=
[[FILE:Hyatt regency atlanta atrium.JPG|border|right|thumb|Hyatt Regency Atrium <ref>Atrium of the Hyatt Regency Hotel, [https://en.wikipedia.org/wiki/Downtown_Atlanta Downtown Atlanta], [[Arts#:Category:John Portman|Portman's]] first [https://en.wikipedia.org/wiki/Atrium_%28architecture%29 atrium] (1967), [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons], November 18, 2010, by StanSatin, [https://en.wikipedia.org/wiki/Hyatt_Regency_Atlanta Hyatt Regency Atlanta from Wikipedia]</ref>]]
The [[ACM 1972|defending champions]] had completely rewritten their program using [[Type A Strategy|Shannon's type A strategy]] and renamed it [[Chess (Program)|Chess 4.0]]. They did it again, but not with a 100% score - after winning three ACM tournaments and ten consecutive tournament games, it only managed to draw from [[Dartmouth CP]] in round 2 - being in trouble most of the [[Dartmouth CP#ChallengingChess|game]], Dartmouth CP [[Repetitions|repeated]] the position for the third time while one pawn ahead. In the third round [[Tech#Tech2|Tech 2]] defeated Dartmouth CP, Chess 4.0 defeated [[Coko|Coko 4]] and [[CHAOS]] won its third straight game to take the lead in the tournament. The last round pitted [[#R4|Chess 4.0 against CHAOS]] - the winner would win the tournament. The game was a highly tactical one in which the large trees examined by Chess were too much for CHAOS to handle. On the last evening of the tournament, after the Chess 4.0 versus CHAOS game was completed, [[Charles Kalme]] played both programs in a simultaneous exhibition with a Queen [https://en.wikipedia.org/wiki/Chess_handicap handicap]. He won the game against CHAOS (and a $100 side bet) but lost from Chess 4.0 <ref>[[Monroe Newborn]] ('''1975'''). ''Computer Chess''. [https://en.wikipedia.org/wiki/Academic_Press Academic Press], New York, N.Y. Chapter IX. The Fourth United States Computer Chess Championship</ref> .
* [http://portal.acm.org/toc.cfm?id=800192&coll=GUIDE&dl=GUIDE&type=proceeding&idx=SERIES324&part=series&WantType=Proceedings&title=ACM%2FCSC-ER&CFID=87593177&CFTOKEN=36310741 Proceedings of the ACM annual conference]
{{ACM Include}}
* [[Videos#ShawnLane:Category:Shawn Lane|Shawn Lane]], [[Videos#JonasHellborg:Category:Jonas Hellborg|Jonas Hellborg]], [[Videos#JeffSipe:Category:Jeff Sipe|Jeff Sipe]] - Improvisation, [https://en.wikipedia.org/wiki/Atlanta Atlanta] Drums & Percussion, August 1920, 1996, [https://en.wikipedia.org/wiki/YouTube YouTube] Video: {{#evu:https://www.youtube.com/watch?v=E46OrveaN_ggPTC7OHeUzA|alignment=left|valignment=top}}
=References=
'''[[ACM North American Computer Chess Championship|Up one level]]'''
[[Category:1973]]
[[Category:ACM]]
[[Category:Jeff Sipe]]
[[Category:Jonas Hellborg]]
[[Category:Shawn Lane]]
[[Category:John Portman]][[Category:1973]]
