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'''[[Main Page|Home]] * [[Tournaments and Matches|Tournaments]] * [[ACM North American Computer Chess Championship]] * ACM 1973'''
'''[[ACM 1972|< Prev]] [[ACM 1974|Next >]]'''
[[FILE:Hyatt-regency-atlanta-side.jpg|border|right|thumb| Hyatt Regency Atlanta <ref>View of the 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.
=Final Standing=
<ref>[http://www.csvn.nl/index.php/historie/computer-computer/86-acm-1973 ACM 1973] [[CSVN]] site</ref>
{| class="wikitable"
|-
! #
! Program
! 1
! 2
! 3
! 4
! P
! SOS
! Playoff
|-
! 1
| [[Chess (Program)|Chess 4.0]]
| style="text-align:center;" | 7w1
| style="text-align:center;" | [[Dartmouth CP#ChallengingChess|5b½]]
| style="text-align:center;" | 8w1
| style="text-align:center;" | [[#R4|2b1]]
! 3½
| style="text-align:center;" | 8½
| style="text-align:right;" |
|-
! 2
| [[CHAOS]]
| style="text-align:center;" | 12w1
| style="text-align:center;" | 10b1
| style="text-align:center;" | 6b1
| style="text-align:center;" | [[#R4|1w0]]
! 3
| style="text-align:center;" | 7
| style="text-align:right;" | 3b1,4w0
|-
! 3
| [[Ostrich]]
| style="text-align:center;" | 8b0
| style="text-align:center;" | 11b1
| style="text-align:center;" | 10w1
| style="text-align:center;" | 6w1
! 3
| style="text-align:center;" | 5½
| style="text-align:right;" | 2w0,4w0
|-
! 4
| [[Tech#Tech2|Tech 2]]
| style="text-align:center;" | [[The Fox#TheFoxTech2|10b0]]
| style="text-align:center;" | 12b1
| style="text-align:center;" | 5w1
| style="text-align:center;" | 9w1
! 3
| style="text-align:center;" | 5
| style="text-align:right;" | 3w1,2b1
|-
! 5
| [[Dartmouth CP]]
| style="text-align:center;" | 9b1
| style="text-align:center;" | [[Dartmouth CP#ChallengingChess|1w½]]
| style="text-align:center;" | 4b0
| style="text-align:center;" | 8w½
! 2
| style="text-align:center;" | 9½
| style="text-align:right;" |
|-
! 6
| [[Tech]]
| style="text-align:center;" | 11w1
| style="text-align:center;" | 8b1
| style="text-align:center;" | 2w0
| style="text-align:center;" | 3b0
! 2
| style="text-align:center;" | 8½
| style="text-align:right;" |
|-
! 7
| [[Belle|T. Belle]]
| style="text-align:center;" | 1b0
| style="text-align:center;" | [[Ga Tech CP#R2|9w½]]
| style="text-align:center;" | 12w½
| style="text-align:center;" | 10w1
! 2
| style="text-align:center;" | 6½
| style="text-align:right;" |
|-
! 8
| [[Coko|Coko 4]]
| style="text-align:center;" | 3w1
| style="text-align:center;" | 6w0
| style="text-align:center;" | 1b0
| style="text-align:center;" | 5b½
! 1½
| style="text-align:center;" | 10½
| style="text-align:right;" |
|-
! 9
| [[Ga Tech CP]]
| style="text-align:center;" | 5w0
| style="text-align:center;" | [[Ga Tech CP#R2|7b½]]
| style="text-align:center;" | 11w1
| style="text-align:center;" | 4b0
! 1½
| style="text-align:center;" | 8
| style="text-align:right;" |
|-
! 10
| [[The Fox]]
| style="text-align:center;" | [[The Fox#TheFoxTech2|4w1]]
| style="text-align:center;" | 2w0
| style="text-align:center;" | 3b0
| style="text-align:center;" | 7b0
! 1
| style="text-align:center;" | 11
| style="text-align:right;" |
|-
! 11
| [[USC CP]]
| style="text-align:center;" | 6b0
| style="text-align:center;" | 3w0
| style="text-align:center;" | 9b0
| style="text-align:center;" | 12w1
! 1
| style="text-align:center;" | 7
| style="text-align:right;" |
|-
! 12
| [[Ches]]
| style="text-align:center;" | 2b0
| style="text-align:center;" | 4w0
| style="text-align:center;" | 7b½
| style="text-align:center;" | 11b0
! ½
| style="text-align:center;" | 9
| style="text-align:right;" |
|}
* SOS: [https://en.wikipedia.org/wiki/Buchholz_system Sum of Opponent Scores]
=Participants=
<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>
{| class="wikitable"
|-
! Program
! Team
! Hardware
! Language
|-
| [[CHAOS]]
| [[Ira Ruben]], [[Fred Swartz]],<br/>[[Joe Winograd]], [[Victor Berman]]
| [[UNIVAC 1100|UNIVAC 1108]]
| [[Fortran]]
|-
| [[Ches]]
| [[David Barton]], [[Craig Barnes]],<br/>[[Peter Rowe]]
| [[HP 3000]]
|
|-
| [[Chess (Program)|Chess 4.0]]
| [[Larry Atkin]], [[Keith Gorlen]],<br/>[[David Slate]]
| [[CDC 6600|CDC 6400]]
| [[Assembly|COMPASS]]
|-
| [[Coko|Coko 4]]
| [[Dennis Cooper]], [[Ed Kozdrowicki]]
| [[UNIVAC 1100|UNIVAC 1108]]
| [[Fortran]]
|-
| [[Dartmouth CP]]
| [[Warren Montgomery]], [[Larry Harris]]
| [[Honeywell 6000|GE-635]]
| [https://en.wikipedia.org/wiki/General_Comprehensive_Operating_System GCOS] [[Assembly]]
|-
| [[Ga Tech CP]]
| [[Lawrence Futrell]]
| [https://en.wikipedia.org/wiki/Burroughs_large_systems#B5000 Burroughs B-5500]
|
|-
| [[Ostrich]]
| [[George Arnold]], [[Monroe Newborn]]
| [[Nova#SuperNOVA|SuperNOVA]]
| [[Assembly]]
|-
| [[Belle|T. Belle]]
| [[Ken Thompson]]
| [[PDP-11]]
| [[C]]
|-
| [[Tech]]
| [[James Gillogly|Jim Gillogly]]
| [[PDP-10]]
| [https://en.wikipedia.org/wiki/BLISS BLISS]
|-
| [[Tech#Tech2|Tech 2]]
| [[Alan Baisley]]
| [[PDP-10]]
| [[Assembly]]
|-
| [[The Fox]]
| [[Charlie Wilkes]], [[Charles F. Wilkes]]
| [[IBM 370|IBM 370/145]]
| [[APL]]
|-
| [[USC CP]]
| [[Albert Zobrist]], [[Frederic Roy Carlson]],<br/>[[Charles Kalme]]
| [[IBM 370|IBM 370/155]]
|
|}
=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#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> .
=Selected Games=
<span id="R4"></span>Round 4, [[CHAOS]] - [[Chess (Program)|Chess 4.0]]
<pre>
[Event "ACM 1973"]
[Site "Atlanta USA"]
[Date "1973.08.28"]
[Round "4"]
[White "CHAOS"]
[Black "Chess 4.0"]
[Result "0-1"]
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7
9.Nc3 Nbd7 10.Bd2 Bd6 11.Rfe1 cxd4 12.exd4 O-O 13.Bg5 Qb6 14.Bc2 Bxf3 15.Qxf3
Qxd4 16.Rad1 Qb4 17.g3 Qxb2 18.Re2 Qa3 19.Qc6 Bb4 20.Rxd7 Rac8 21.Rc7 Rxc7
22.Qxc7 Qxc3 23.Qb7 Qc4 24.Bd1 Rd8 25.Re5 Rxd1+ 26.Kg2 Qf1+ 27.Kf3 Qh1+ 28.Ke2
Re1+ 29.Kd3 Qf1+ 30.Kd4 Qc4# 0-1
</pre>
Game and short analyze on Lichess.org : [https://en.lichess.org/kVgFAOTq]
=Tournament Director=
* [[David Levy]]
=Publications=
* [[L. Stephen Coles|Steve Coles]] ('''1973'''). ''[http://dl.acm.org/citation.cfm?id=1045171.1045175 Fourth United States computer chess championship from ACM73 news release]''. [[ACM#SIG|ACM SIGART Bulletin]], No. 41
* [[Ben Mittman]], [[Monroe Newborn|Monty Newborn]] ('''1973'''). ''[http://dl.acm.org/citation.cfm?id=1045181 Results of the fourth annual U.S. computer chess tournament]''. [[ACM#SIG|ACM SIGART Bulletin]], No. 42
* [[Richard Fikes]] ('''1974'''). ''[http://dl.acm.org/citation.cfm?id=1045183.1045188&coll=DL&dl=GUIDE&CFID=100074742&CFTOKEN=36442119 Fourth U.S. Computer Chess Championship]''. [[ACM#SIG|ACM SIGART Bulletin]], No. 44, 45
* [[Monroe Newborn]] ('''1975'''). ''Computer Chess''. [https://en.wikipedia.org/wiki/Academic_Press Academic Press], New York, N.Y. ISBN 0-125-17250-8.
: Chapter IX. The Fourth United States Computer Chess Championship
=External Links=
* [http://www.csvn.nl/index.php/historie/computer-computer/86-acm-1973 ACM 1973] [[CSVN]] site
* [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]
* [[Videos#ShawnLane|Shawn Lane]], [[Videos#JonasHellborg|Jonas Hellborg]], [[Videos#JeffSipe|Jeff Sipe]] - Improvisation, [https://en.wikipedia.org/wiki/Atlanta Atlanta] Drums & Percussion, August 19, 1996, [https://en.wikipedia.org/wiki/YouTube YouTube] Video
: {{#evu:https://www.youtube.com/watch?v=E46OrveaN_g|alignment=left|valignment=top}}
{{ACM Include}}
=References=
<references />
'''[[ACM North American Computer Chess Championship|Up one level]]'''
[[Category:Tournaments]]
[[Category:1973]]
[[Category:ACM]]
[[Category:Jeff Sipe]]
[[Category:Jonas Hellborg]]
[[Category:Music Videos]]
[[Category:Shawn Lane]]
[[Category:Portman]]
'''[[ACM 1972|< Prev]] [[ACM 1974|Next >]]'''
[[FILE:Hyatt-regency-atlanta-side.jpg|border|right|thumb| Hyatt Regency Atlanta <ref>View of the 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.
=Final Standing=
<ref>[http://www.csvn.nl/index.php/historie/computer-computer/86-acm-1973 ACM 1973] [[CSVN]] site</ref>
{| class="wikitable"
|-
! #
! Program
! 1
! 2
! 3
! 4
! P
! SOS
! Playoff
|-
! 1
| [[Chess (Program)|Chess 4.0]]
| style="text-align:center;" | 7w1
| style="text-align:center;" | [[Dartmouth CP#ChallengingChess|5b½]]
| style="text-align:center;" | 8w1
| style="text-align:center;" | [[#R4|2b1]]
! 3½
| style="text-align:center;" | 8½
| style="text-align:right;" |
|-
! 2
| [[CHAOS]]
| style="text-align:center;" | 12w1
| style="text-align:center;" | 10b1
| style="text-align:center;" | 6b1
| style="text-align:center;" | [[#R4|1w0]]
! 3
| style="text-align:center;" | 7
| style="text-align:right;" | 3b1,4w0
|-
! 3
| [[Ostrich]]
| style="text-align:center;" | 8b0
| style="text-align:center;" | 11b1
| style="text-align:center;" | 10w1
| style="text-align:center;" | 6w1
! 3
| style="text-align:center;" | 5½
| style="text-align:right;" | 2w0,4w0
|-
! 4
| [[Tech#Tech2|Tech 2]]
| style="text-align:center;" | [[The Fox#TheFoxTech2|10b0]]
| style="text-align:center;" | 12b1
| style="text-align:center;" | 5w1
| style="text-align:center;" | 9w1
! 3
| style="text-align:center;" | 5
| style="text-align:right;" | 3w1,2b1
|-
! 5
| [[Dartmouth CP]]
| style="text-align:center;" | 9b1
| style="text-align:center;" | [[Dartmouth CP#ChallengingChess|1w½]]
| style="text-align:center;" | 4b0
| style="text-align:center;" | 8w½
! 2
| style="text-align:center;" | 9½
| style="text-align:right;" |
|-
! 6
| [[Tech]]
| style="text-align:center;" | 11w1
| style="text-align:center;" | 8b1
| style="text-align:center;" | 2w0
| style="text-align:center;" | 3b0
! 2
| style="text-align:center;" | 8½
| style="text-align:right;" |
|-
! 7
| [[Belle|T. Belle]]
| style="text-align:center;" | 1b0
| style="text-align:center;" | [[Ga Tech CP#R2|9w½]]
| style="text-align:center;" | 12w½
| style="text-align:center;" | 10w1
! 2
| style="text-align:center;" | 6½
| style="text-align:right;" |
|-
! 8
| [[Coko|Coko 4]]
| style="text-align:center;" | 3w1
| style="text-align:center;" | 6w0
| style="text-align:center;" | 1b0
| style="text-align:center;" | 5b½
! 1½
| style="text-align:center;" | 10½
| style="text-align:right;" |
|-
! 9
| [[Ga Tech CP]]
| style="text-align:center;" | 5w0
| style="text-align:center;" | [[Ga Tech CP#R2|7b½]]
| style="text-align:center;" | 11w1
| style="text-align:center;" | 4b0
! 1½
| style="text-align:center;" | 8
| style="text-align:right;" |
|-
! 10
| [[The Fox]]
| style="text-align:center;" | [[The Fox#TheFoxTech2|4w1]]
| style="text-align:center;" | 2w0
| style="text-align:center;" | 3b0
| style="text-align:center;" | 7b0
! 1
| style="text-align:center;" | 11
| style="text-align:right;" |
|-
! 11
| [[USC CP]]
| style="text-align:center;" | 6b0
| style="text-align:center;" | 3w0
| style="text-align:center;" | 9b0
| style="text-align:center;" | 12w1
! 1
| style="text-align:center;" | 7
| style="text-align:right;" |
|-
! 12
| [[Ches]]
| style="text-align:center;" | 2b0
| style="text-align:center;" | 4w0
| style="text-align:center;" | 7b½
| style="text-align:center;" | 11b0
! ½
| style="text-align:center;" | 9
| style="text-align:right;" |
|}
* SOS: [https://en.wikipedia.org/wiki/Buchholz_system Sum of Opponent Scores]
=Participants=
<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>
{| class="wikitable"
|-
! Program
! Team
! Hardware
! Language
|-
| [[CHAOS]]
| [[Ira Ruben]], [[Fred Swartz]],<br/>[[Joe Winograd]], [[Victor Berman]]
| [[UNIVAC 1100|UNIVAC 1108]]
| [[Fortran]]
|-
| [[Ches]]
| [[David Barton]], [[Craig Barnes]],<br/>[[Peter Rowe]]
| [[HP 3000]]
|
|-
| [[Chess (Program)|Chess 4.0]]
| [[Larry Atkin]], [[Keith Gorlen]],<br/>[[David Slate]]
| [[CDC 6600|CDC 6400]]
| [[Assembly|COMPASS]]
|-
| [[Coko|Coko 4]]
| [[Dennis Cooper]], [[Ed Kozdrowicki]]
| [[UNIVAC 1100|UNIVAC 1108]]
| [[Fortran]]
|-
| [[Dartmouth CP]]
| [[Warren Montgomery]], [[Larry Harris]]
| [[Honeywell 6000|GE-635]]
| [https://en.wikipedia.org/wiki/General_Comprehensive_Operating_System GCOS] [[Assembly]]
|-
| [[Ga Tech CP]]
| [[Lawrence Futrell]]
| [https://en.wikipedia.org/wiki/Burroughs_large_systems#B5000 Burroughs B-5500]
|
|-
| [[Ostrich]]
| [[George Arnold]], [[Monroe Newborn]]
| [[Nova#SuperNOVA|SuperNOVA]]
| [[Assembly]]
|-
| [[Belle|T. Belle]]
| [[Ken Thompson]]
| [[PDP-11]]
| [[C]]
|-
| [[Tech]]
| [[James Gillogly|Jim Gillogly]]
| [[PDP-10]]
| [https://en.wikipedia.org/wiki/BLISS BLISS]
|-
| [[Tech#Tech2|Tech 2]]
| [[Alan Baisley]]
| [[PDP-10]]
| [[Assembly]]
|-
| [[The Fox]]
| [[Charlie Wilkes]], [[Charles F. Wilkes]]
| [[IBM 370|IBM 370/145]]
| [[APL]]
|-
| [[USC CP]]
| [[Albert Zobrist]], [[Frederic Roy Carlson]],<br/>[[Charles Kalme]]
| [[IBM 370|IBM 370/155]]
|
|}
=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#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> .
=Selected Games=
<span id="R4"></span>Round 4, [[CHAOS]] - [[Chess (Program)|Chess 4.0]]
<pre>
[Event "ACM 1973"]
[Site "Atlanta USA"]
[Date "1973.08.28"]
[Round "4"]
[White "CHAOS"]
[Black "Chess 4.0"]
[Result "0-1"]
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7
9.Nc3 Nbd7 10.Bd2 Bd6 11.Rfe1 cxd4 12.exd4 O-O 13.Bg5 Qb6 14.Bc2 Bxf3 15.Qxf3
Qxd4 16.Rad1 Qb4 17.g3 Qxb2 18.Re2 Qa3 19.Qc6 Bb4 20.Rxd7 Rac8 21.Rc7 Rxc7
22.Qxc7 Qxc3 23.Qb7 Qc4 24.Bd1 Rd8 25.Re5 Rxd1+ 26.Kg2 Qf1+ 27.Kf3 Qh1+ 28.Ke2
Re1+ 29.Kd3 Qf1+ 30.Kd4 Qc4# 0-1
</pre>
Game and short analyze on Lichess.org : [https://en.lichess.org/kVgFAOTq]
=Tournament Director=
* [[David Levy]]
=Publications=
* [[L. Stephen Coles|Steve Coles]] ('''1973'''). ''[http://dl.acm.org/citation.cfm?id=1045171.1045175 Fourth United States computer chess championship from ACM73 news release]''. [[ACM#SIG|ACM SIGART Bulletin]], No. 41
* [[Ben Mittman]], [[Monroe Newborn|Monty Newborn]] ('''1973'''). ''[http://dl.acm.org/citation.cfm?id=1045181 Results of the fourth annual U.S. computer chess tournament]''. [[ACM#SIG|ACM SIGART Bulletin]], No. 42
* [[Richard Fikes]] ('''1974'''). ''[http://dl.acm.org/citation.cfm?id=1045183.1045188&coll=DL&dl=GUIDE&CFID=100074742&CFTOKEN=36442119 Fourth U.S. Computer Chess Championship]''. [[ACM#SIG|ACM SIGART Bulletin]], No. 44, 45
* [[Monroe Newborn]] ('''1975'''). ''Computer Chess''. [https://en.wikipedia.org/wiki/Academic_Press Academic Press], New York, N.Y. ISBN 0-125-17250-8.
: Chapter IX. The Fourth United States Computer Chess Championship
=External Links=
* [http://www.csvn.nl/index.php/historie/computer-computer/86-acm-1973 ACM 1973] [[CSVN]] site
* [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]
* [[Videos#ShawnLane|Shawn Lane]], [[Videos#JonasHellborg|Jonas Hellborg]], [[Videos#JeffSipe|Jeff Sipe]] - Improvisation, [https://en.wikipedia.org/wiki/Atlanta Atlanta] Drums & Percussion, August 19, 1996, [https://en.wikipedia.org/wiki/YouTube YouTube] Video
: {{#evu:https://www.youtube.com/watch?v=E46OrveaN_g|alignment=left|valignment=top}}
{{ACM Include}}
=References=
<references />
'''[[ACM North American Computer Chess Championship|Up one level]]'''
[[Category:Tournaments]]
[[Category:1973]]
[[Category:ACM]]
[[Category:Jeff Sipe]]
[[Category:Jonas Hellborg]]
[[Category:Music Videos]]
[[Category:Shawn Lane]]
[[Category:Portman]]
