ACM 1990

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ACM's 21st North American Computer Chess Championship (NACCC) was held in conjunction with the ACM/IEEE Supercomputing Conference from November 11 to 14, 1990 at New York Hilton, New York, United_States, the same place as 20 years before the first ACM 1970 took place.

For the first time, a sudden death time control of 120 minutes per side and game was incorporated, affecting the outcome of the tournament, which emerged with Deep Thought and Mephisto as co-champions with 4 points. Newcomers were Nightmare by Reinhold Gellner and Gaby von Rekowski, and Now by Mark Lefler. Another newcomer, Zerker by James Testa of the UC Berkeley was not able to get up and running at the tournament site and left an odd field. However, Zerker won the battle for best pre-tournament hype, as it reported 7,000,000 moves per second, roughly three times faster than Deep Thought.

=Final Standing=
 * CC Country Codes
 * SOS: Sum of Opponent Scores
 * SoDOS: Sum of Defeated Opponent Scores

=Participants=
 * CC Country Codes

=Selected Games=

Round 1
Round 1, Zarkov - HiTech [Event "ACM 1990"] [Site "New York USA"] [Date "1990.11.11"] [Round "1"] [White "Zarkov"] [Black "HiTech"] [Result "1/2-1/2"]

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.a4 Nbd7 10.axb5 axb5 11.Rxa8 Qxa8 12.Nc3 b4 13.Nb5 Qa5 14.Ne5 Bd5 15.Bxd5 exd5 16.b3 Qb6 17.Nxd7 Nxd7 18.Bb2 Qc6 19.dxc5 Nxc5 20.Rd1 Ne6 21.Qd3 Bc5 22.Qxd5 Qxd5 23.Rxd5 f6 24.Nc7+ Nxc7 25.Rxc5 Kd7 26.Rc4 Rb8 27.Kf1 Rb5 28.Ke2 Ne6 29.Bc1 Nd8 30.Rg4 g6 31.Bb2 f5 32.Rd4+ Ke7 33.Rc4 Ke6 34.e4 Nb7 35.Rc6+ Kd7 36.Rf6 fxe4 37.Rf7+ Kc6 38.Rxh7 Nd6 39.Ra7 Rg5 40.Ra6+ Kd7 41.g3 Rc5 42.Bd4 Rd5 43.Be3 Rd3 44.Bc5 Nb5 45.Rb6 Nc3+ 46.Kf1 e3 47.fxe3 Ne4 48.Bxb4 Rxb3 49.Ba5 Ra3 50.Be1 g5 51.Ke2 g4 52.Rb4 Ra2+ 53.Kd1 Nf6 54.Bd2 Ke6 55.Ke2 Ke5 56.Rb5+ Ke4 57.Rc5 Ra4 58.Rc1 Ra3 59.Rc6 Kf5 60.Rc5+ Ke4 61.Rc3 Rxc3 62.Bxc3 Nh7 63.Kf2 Ng5 64.Ba5 Nh3+ 65.Kg2 Kxe3 66.Bd8 Ke2 67.Bf6 Nf2 68.Be5 Ne4 69.Bg7 Ke3 70.Bh6+ Ke2 71.Bf4 Nc5 72.Bc7 Ne4 73.Be5 Ke1 74.Bd4 Ke2 75.Bb2 Ke3 76.Bc1+ Ke2 77.Bh6 Nf2 78.Bg7 1/2-1/2
 * View this game on Lichess.org

Round 4
Round 4, HiTech - Deep Thought [Event "ACM 1990"] [Site "New York USA"] [Date "1990.11.13"] [Round "4"] [White "HiTech"] [Black "Deep Thought"] [Result "1-0"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 Nf6 6.Re1 O-O 7.d4 cxd4 8.cxd4 d5 9.e5 Ne4 10.Nc3 Nxc3 11.bxc3 Bg4 12.h3 Bf5 13.Bxc6 bxc6 14.Ba3 Rb8 15.Bc5 Qc7 16.Qc1 Rb7 17.Nh4 Be4 18.Qe3 Rfb8 19.f3 Bc2 20.Rec1 Ba4 21.f4 Bb5 22.f5 Kh8 23.e6 Bf6 24.exf7 Kg7 25.Nf3 gxf5 26.Re1 Kxf7 27.Qh6 Qg3 28.Qxh7+ Ke8 29.Qxf5 Qg7 30.Re6 Bc4 31.Rxc6 Kd8 32.Bd6 Bb5 33.Ne5 Bxe5 34.Bxe5 Qxe5 35.Qxe5 Bxc6 36.Qe6 Rb1+ 37.Rxb1 Rxb1+ 38.Kh2 Rb6 39.g4 Bb7 40.Qg8+ Kc7 41.Qf7 Bc6 42.Qxe7+ Bd7 43.Qc5+ Rc6 44.Qxd5 Re6 45.Kg3 Re1 46.c4 Re2 47.Qa5+ Kb7 48.Qb4+ Kc8 49.Qa3 Kb8 50.d5 Re4 51.c5 Bxg4 1-0
 * View this game on Lichess.org

Round 5
Round 5, Mephisto - HiTech [Event "ACM 1990"] [Site "New York USA"] [Date "1990.11.14"] [Round "5"] [White "Mephisto"] [Black "HiTech"] [Result "1-0"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.cxd5 Nxd5 6.Bd2 O-O 7.Rc1 Nc6 8.e4 Nxc3 9.bxc3 Qd6 10.Be2 e5 11.d5 Nb8 12.c4 Nd7 13.O-O Nc5 14.Bb4 Qb6 15.Rb1 Re8 16.Qc2 h6 17.Rfc1 a6 18.h3 Rb8 19.Nd2 Bd7 20.Qc3 Bf8 21.Qe3 f5 22.Qg3 Kh7 23.Bc3 f4 24.Rxb6 fxg3 25.Rf6 Be7 26.Rf3 gxf2+ 27.Rxf2 Bg5 28.Rf3 Kg8 29.Bb4 b6 30.Rcf1 Bxd2 31.Bxd2 g5 32.Re3 Rf8 33.Rxf8+ Kxf8 34.Bc3 Re8 35.Bb4 Ra8 36.Bxc5+ bxc5 37.Rb3 Ke7 38.Kf2 a5 39.Ke3 Kd6 40.Rb7 Be8 41.Bg4 h5 42.Bf5 h4 43.a3 Bh5 44.Kd3 Bf7 45.Kd2 Be8 46.Ke2 a4 47.Kf3 Bh5+ 48.Kf2 Bf7 49.g3 hxg3+ 50.Kxg3 Bh5 51.Kf2 Bd1 52.Ke3 Bh5 53.Rb1 Rf8 54.Rb5 Ra8 55.Rb7 Bf7 56.Kd2 Bh5 57.Kd3 Be8 58.Rb1 Bh5 59.Rb2 Rd8 60.Rb7 Ra8 61.Kd2 Bf7 62.Ke1 Ra6 63.Rb8 Ke7 64.Kf2 Rb6 65.Rxb6 cxb6 66.Kg3 Bh5 67.Bg4 Be8 68.Be2 Bg6 69.Bd3 Bh5 70.h4 gxh4+ 71.Kxh4 Be8 72.Kg4 Bd7+ 73.Kg5 Bh3 74.Kh4 Bc8 75.Bf1 Kf6 76.Kg3 Ke7 77.Kf3 Bd7 78.Be2 Kd6 79.Ke3 Ke7 80.Kd2 Bh3 81.Kc3 Bc8 82.Bd1 Bd7 83.Bc2 Kd6 84.Bd3 Be8 85.Be2 Bg6 86.Kd3 Be8 87.Kd2 Bg6 88.Bf3 Ke7 89.Bg2 Bh5 90.Ke3 Be8 91.Bf1 Kd7 92.Be2 Kd6 93.Kd3 Kd7 94.Kc3 Kd6 95.Bd3 Kd7 96.Kd2 Kd6 97.Bf1 Bg6 98.Ke3 Bh5 99.Bd3 Be8 100.Kf2 Bh5 101.Kg3 Bd1 102.Kg2 Bg4 103.Kf1 Bh5 104.Kf2 Be8 105.Kg3 Bd7 106.Be2 Ke7 107.Kh4 Bc8 108.Bd3 Kd6 109.Bf1 Ke7 110.Kg5 Kd6 111.Kf6 Bg4 112.Bd3 Bd7 113.Be2 Bh3 114.Kg5 Ke7 115.Kg6 Bg2 116.Kf5 Kd6 117.Bd3 Bh3+ 118.Kg5 Bd7 119.Bc2 b5 120.cxb5 Bxb5 121.Kg4 c4 122.Kf3 Bd7 123.Ke3 Kc5 124.Bd1 Be8 125.Bg4 Kd6 126.Kd2 Bg6 127.Bf3 Kc5 128.Kc3 Bh7 129.d6 Kxd6 130.Kxc4 Bg8+ 131.Kb5 Bb3 132.Bh5 Bc2 133.Bf3 Ke6 134.Kc5 Bb3 135.Bg2 Kf6 136.Kd6 Be6 137.Bf1 Bf7 138.Bb5 Bb3 139.Be8 Bc2 140.Bc6 Bd1 141.Kd5 Bb3+ 142.Kc5 Bd1 143.Kb4 Bc2 144.Bxa4 Bxe4 145.Bb5 Bc2 {time} 1-0
 * View this game on Lichess.org

=Tournament Director=
 * Michael Valvo
 * Danny Kopec (Assistant)

=Guests=
 * Harold Bogner
 * David Levy
 * Tony Marsland
 * Donald Michie
 * Jonathan Schaeffer

=Publications=

Tournament

 * The 21st Annual ACM North American Computer Chess Championship from The Computer History Museum, pdf
 * Robert Levinson (1990). The ACM 21st North American Computer-Chess Championship. ICCA Journal, Vol. 13, No. 4
 * Ken Thompson (1990). Results and Games - The ACM 21st North American Computer-Chess Championship. ICCA Journal, Vol. 13, No. 4
 * Dawn Stover (1991). The world's next chess champion. Popular Science, March 1991, google books
 * Monty Newborn, Danny Kopec (1991). The 21st ACM North American Computer Chess Championship. Communications of the ACM, Vol. 34, No. 11, online

Technical Session

 * John Stanback (1990). Supercomputing '90: Computer-Chess Testing and Programming Session. ICCA Journal, Vol. 13, No. 4

=External Links=
 * ACM 1990 CSVN site
 * Quick moves claim computer-chess title - Free Online Library, November 24, 1990

=References=

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