ACM+1991

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 * [[image:Doubletree.jpg link="http://www.venere.com/doubletree-hotels/albuquerque/hotel-doubletree-by-hilton/"]] ||~  || ACM's **22nd North American Computer Chess Championship** (NACCC), alongside the [|ACM/IEEE Supercomputing Conference], was held November 17-20, 1991 at the Doubletree Hotel, [|Albuquerque], [|New Mexico], USA. ||
 * Hotel DoubleTree by Hilton ||~  ||^   ||
 * ~ # ||~ Program ||~ CC ||~ 1 ||~ 2 ||~ 3 ||~ 4 ||~ 5 ||~ P ||~ SOS ||~ SoDOS ||
 * ~ 1 ||< Deep Thought II ||~ US ||> 7w1 ||> 2b1 ||> 5w1 ||> 3b1 ||> 6w1 ||~ 5 ||= 14½ ||= 14½ ||
 * ~ 2 ||< M-Chess ||~ US ||> 12b1 ||> 1w0 ||> 8w1 ||> 9b1 ||> 5w1 ||~ 4 ||= 12 ||= 7 ||
 * ~ 3 ||< Cray Blitz ||~ US ||> 9w1 ||> 8b½ ||> 6w½ ||> 1w0 ||> 7b1 ||~ 3 ||= 14½ ||= 7 ||
 * ~ 4 ||< Mephisto ||~ GB ||> 8b0 ||> 10w1 ||> 7b0 ||> 11w1 ||> 9w1 ||~ 3 ||= 10 ||= 5 ||
 * ~ 5 ||< Hitech ||~ US ||> 10b1 ||> 6w1 ||> 1b0 ||> 7w½ ||> 2b0 ||~ 2½ ||= 16 ||= 5¾ ||
 * ~ 6 ||< ChessMachine Schroder ||~ NL ||> 11w1 ||> 5b0 ||> 3b½ ||> 8w1 ||> 1b0 ||~ 2½ ||= 14 ||= 5 ||
 * ~ 7 ||< Zarkov ||~ US ||> 1b0 ||> 12w1 ||> 4w1 ||> 5b½ ||> 3w0 ||~ 2½ ||= 13½ ||= 4¼ ||
 * ~ 8 ||< Socrates ||~ US ||> 4w1 ||> 3w½ ||> 2b0 ||> 6b0 ||> 12w1 ||~ 2½ ||= 12½ ||= 4½ ||
 * ~ 9 ||< BP ||~ US ||> 3b0 ||> 11b1 ||> 10w1 ||> 2w0 ||> 4b0 ||~ 2 ||= 13 ||= 3 ||
 * ~ 10 ||< Lachex ||~ US ||> 5w0 ||> 4b0 ||> 9b0 ||> 12w1 ||> 11b1 ||~ 2 ||= 8½ ||= 1 ||
 * ~ 11 ||< Bebe ||~ US ||> 6b0 ||> 9w0 ||> 12b1 ||> 4b0 ||> 10w0 ||~ 1 ||= 9½ ||= 0 ||
 * ~ 12 ||< Delicate Brute ||~ GB ||> 2w0 ||> 7b0 ||> 11w0 ||> 10b0 ||> 8b0 ||~ 0 ||= 12 ||= 0 ||
 * [|CC Country Codes]
 * SOS: [|Sum of Opponent Scores]
 * SoDOS: [|Sum of Defeated Opponent Scores]

=Participants= Joe Hoane, Jerry Brody || [|RS/6000 550] & 24 custom chess processors || C, [|Microcode] || Chris McConnell || Sun-4 & special chess hardware || [|Microcode], Assembly || =Photos=  =Knight Promotion= As recently mentioned by Robert Hyatt, Lachex didn't notice the knight minor promotion with 48... Qe4 versus Mephisto: code [Event "ACM 1991"] [Site "Albuquerque USA"] [Date "1991.11.12"] [Round "2"] [White "Mephisto"] [Black "Lachex"] [Result "1-0"]
 * ~ Program ||~ CC ||~ Team ||~ Hardware ||~ Language ||
 * < Bebe ||~ US || Tony Scherzer, Linda Scherzer || SYS-10 [|bit slice] hardware || Assembly ||
 * < BP ||~ US || Robert Cullum || IBM PC 486/33 || C, Assembly ||
 * < ChessMachine Schroder ||~ NL || Ed Schröder, Jan Louwman || ARM2 31 MHz ||
 * < Cray Blitz ||~ US || Robert Hyatt, Albert Gower || Cray Y-MP-8 || Fortran, C, Assembly ||
 * < Deep Thought II ||~ US || Feng-hsiung Hsu, Murray Campbell,
 * < Delicate Brute ||~ GB || Don Beal || Sun-4 ||  ||
 * < Hitech ||~ US || Carl Ebeling, Hans Berliner,
 * < Lachex ||~ US || Tony Warnock, Burton Wendroff || Cray Y-MP ZE || Fortran, Assembly ||
 * < M-Chess ||~ US || Marty Hirsch || IBM PC 486 || C, Assembly ||
 * < Mephisto ||~ GB || Richard Lang || 68030 || Assembly ||
 * < Socrates ||~ US || Don Dailey, Larry Kaufman || IBM PC 486/33 || Assembly ||
 * < Zarkov ||~ US || John Stanback || [|HP 9000/732] || C ||
 * [[image:ACM1991.jpg]] ||
 * Playing Hall, Jaap van den Herik talking with Marty Hirsch ||

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Nbd2 Nc5 10.c3 d4 11.Bxe6 Nxe6 12.cxd4 Ncxd4 13.Ne4 Be7 14.Be3 Nf5 15.Qc2 O-O 16.Nf6+ Bxf6 17.Qxf5 Be7 18.Rfd1 Qc8 19.Rd2 c5 20.Rad1 Qc6 21.b3 Rad8 22.h3 c4 23.bxc4 bxc4 24.Nd4 Nxd4 25.Rxd4 c3 26.Rc1 Ba3 27.Rc2 Bb2 28.Qe4 Qe6 29.Ra4 Rd1+ 30.Kh2 Rfd8 31.Rc4 Rc8 32.Rxc8+ Qxc8 33.a4 Ra1 34.Bb6 Qe8 35.a5 Ra4 36.Qd5 Rb4 37.Qd6 Rc4 38.Kg1 h6 39.Qd3 Ra4 40.Qd6 Re4 41.Bc7 Re1+ 42.Kh2 Qc8 43.Qb6 Qf5 44.Qb8+ Kh7 45.e6 Qxc2 46.exf7 Ba3 47.Qg8+ Kg6 48.Qe8 Qe4 49.f8=N+ Kf6 50.Nd7+ Kg5 1-0 code Game and short analyze on Lichess.org : []

=Where is Computer Chess Going?= A technical session titled //Where is Computer Chess Going// was moderated by Tony Marsland, with Hans Berliner, Monroe Newborn, Murray Campbell, Robert Levinson and Jaap van den Herik attending as panelist. At one point the discussion went on brute strength versus trimming techniques - Campbell replied that both approaches will eventually succeed. Larry Kaufman commented from the audience that selective searches outperform full width on comparable hardware. Don Dailey mentioned that one main goal is to beat the World Champion. He asked "How long will it take to cross the extra distance and play a perfect game?". Berliner replied, "Centuries! A perfect game is a science-fiction dream". Further, Robert Levinson gave a presentation of his Morph project.

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

=Publications=

Tournament

 * Don Beal (**1991**). //Report on the 22nd ACM International Computer Chess Championship//. ICCA Journal, Vol. 14, No. 4
 * Danny Kopec, Monroe Newborn, Michael Valvo (**1992**). //The 22d Annual ACM International Chess Championship//, in [|The 23rd ACM International Computer Chess Championship] from The Computer History Museum, [|pdf]

Technical Session

 * Garth Courtois Jr. (**1991**). //Where is Computer Chess Going?// ICCA Journal, Vol. 14, No. 4

=External Links= include page="ACM Include" =References= =What links here?= include component="backlinks" page="ACM 1991" limit="40"
 * [|ACM 1991] CSVN site
 * Up one level**