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'''[[ACM 1980|< Prev]] [[ACM 1982|Next >]]'''
[[FILE:Westin Bonaventure Hotel.jpg|border|right|thumb| Westin Bonaventure Hotel <ref>[https://commons.wikimedia.org/wiki/File:Westin_Bonaventure_Hotel.jpg Westin Bonaventure Hotel] designed by [[Arts#:Category:John Portman|John Portman]] - as seen from the platform of [https://en.wikipedia.org/wiki/Citigroup_Center_%28Los_Angeles%29 444 S. Flower Building], [https://en.wikipedia.org/wiki/Downtown_Los_Angeles Downtown Los Angeles], Photo by [https://en.wikipedia.org/wiki/User:Geographer Geographer], December 31, 2006, [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons], [https://en.wikipedia.org/wiki/Westin_Bonaventure_Hotel Westin Bonaventure Hotel from Wikipedia]</ref> ]]
The [[ACM|ACM's]] '''Twelfth North American Computer Chess Championship''' (NACCC) was held from November 8 to 11, [[Timeline#1981|1981]] at the [https://en.wikipedia.org/wiki/Westin_Bonaventure_Hotel Bonaventure Hotel], [https://en.wikipedia.org/wiki/Los_Angeles%2C_California Los Angeles], [https://en.wikipedia.org/wiki/California California], USA <ref>[[Ben Mittman]] ('''1981'''). ''Tournament Announcement - ACM Tournament in Los Angeles''. [[ICGA Journal#4_1|ICCA Newletter, Vol. 4, No. 1]]</ref> .
! CA
| [[Tony Marsland]]
| [[AMDAHL Amdahl 470|AMDAHL 470V/7]]
| [[Algol|Algol-W]]
|-
! US
| [[Fred Swartz]], [[Mike Alexander]], [[Jack O’Keefe]],<br/>[[Mark Hersey]], [[Victor Berman]]
| [[AMDAHL Amdahl 470]]
| [[Fortran]]
|-
| style="text-align:left;" | [[Chaturanga]]
! US
| [[John Poduska, Jr.]]
| [[68000]] based [https://en.wikipedia.org/wiki/Apollo_Computer Apollo] [https://en.wikipedia.org/wiki/Workstation workstation]
| [[Pascal]]
! CA
| [[Claude Jarry]]
| [[AMDAHL Amdahl 470|AMDAHL 470V/7]]
| [[Assembly]]
|-
'''[[ACM North American Computer Chess Championship|Up one level]]'''
[[Category:John Portman]]
