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The ACM's Fourth North American Computer Chess Championship (NACCC) was held from August 26 to 28, 1973 at the Hyatt Regency Hotel, Atlanta, Georgia, USA.
Hyatt Regency Atlanta [1]

Final Standing

[2]
#
Program

1

2

3

4
P
SOS
Playoff
1
Chess 4.0

7w1

5b½

8w1

2b1



2
CHAOS

12w1

10b1

6b1

1w0
3
7
3b1,4w0
3
Ostrich

8b0

11b1

10w1

6w1
3

2w0,4w0
4
Tech 2

10b0

12b1

5w1

9w1
3
5
3w1,2b1
5
Dartmouth CP

9b1

1w½

4b0

8w½
2


6
Tech

11w1

8b1

2w0

3b0
2


7
T. Belle

1b0

9w½

12w½

10w1
2


8
Coko 4

3w1

6w0

1b0

5b½

10½

9
Ga Tech CP

5w0

7b½

11w1

4b0

8

10
The Fox

4w1

2w0

3b0

7b0
1
11

11
USC CP

6b0

3w0

9b0

12w1
1
7

12
Ches

2b0

4w0

7b½

11b0
½
9


Participants

[3]
Program
Team
Hardware
Language
CHAOS
Ira Ruben, Fred Swartz,
Joe Winograd, Victor Berman
UNIVAC 1108
Fortran
Ches
David Barton, Craig Barnes,
Peter Rowe
HP 3000

Chess 4.0
Larry Atkin, Keith Gorlen,
David Slate
CDC 6400
COMPASS
Coko 4
Dennis Cooper, Ed Kozdrowicki
UNIVAC 1108
Fortran
Dartmouth CP
Warren Montgomery, Larry Harris
GE-635
GCOS Assembly
Ga Tech CP
Lawrence Futrell
Burroughs B-5500

Ostrich
George Arnold, Monroe Newborn
SuperNOVA
Assembly
T. Belle
Ken Thompson
PDP-11
C
Tech
Jim Gillogly
PDP-10
BLISS
Tech 2
Alan Baisley
PDP-10
Assembly
The Fox
Charlie Wilkes, Charles F. Wilkes
IBM 370/145
APL
USC CP
Albert Zobrist, Frederic Roy Carlson,
Charles Kalme
IBM 370/155


The Tournament

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The defending champions had completely rewritten their program using Shannon's type A strategy and renamed it 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 game, Dartmouth CP repeated the position for the third time while one pawn ahead. In the third round Tech 2 defeated Dartmouth CP, Chess 4.0 defeated Coko 4 and CHAOS won its third straight game to take the lead in the tournament. The last round pitted 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 handicap. He won the game against CHAOS (and a $100 side bet) but lost from Chess 4.0 [4] .
Hyatt Regency Atrium [5]


Selected Games

Round 4, CHAOS - Chess 4.0
[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
Game and short analyze on Lichess.org : https://en.lichess.org/kVgFAOTq

Tournament Director


Publications


External Links


References

  1. ^ View of the Hyatt Regency Atlanta from the Marriott Marquis, Wikimedia Commons, November 04, 2007, by Connor.carey, Hyatt Regency Atlanta from Wikipedia
  2. ^ ACM 1973 CSVN site
  3. ^ Monroe Newborn (1975). Computer Chess. Academic Press, New York, N.Y. Chapter IX. The Fourth United States Computer Chess Championship
  4. ^ Monroe Newborn (1975). Computer Chess. Academic Press, New York, N.Y. Chapter IX. The Fourth United States Computer Chess Championship
  5. ^ Atrium of the Hyatt Regency Hotel, Downtown Atlanta, Portman's first atrium (1967), Wikimedia Commons, November 18, 2010, by StanSatin, Hyatt Regency Atlanta from Wikipedia

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