LogiChess,
the first chess program by Kaare Danielsen developed in 1981 for the Z80 processor. It competed at the 2nd European MCC 1981 (3rd place) 1 and two World Microcomputer Chess Championships in 1981 and 1983, at times supported by Hartvig Ekner 2.
SciSys & CXG
As 4K dedicated chess computer program, LogiChess was ported to the 6800 instruction set compatible [https://en.wikipedia.org/wiki/Hitachi_Ltd. Hitachi] HD6301V1 and Newcrest 6301 8-bit controllers. It was sold in approximately 200.000 units 3 from SciSys as SciSys Explorer, SciSys Concord II and SciSys Companion II, and from RadioShack as Tandy 1650 4. Another 4K 5 branch was realized for Newcrest Technology, for the CXG Computachess III in 1984 6, as well inside the CXG Star Chess of 1985 7 8. According to its author, LogiChess is still the strongest 4K chess computer in the world 9.
Lexibook
The Motorola 6800 LogiChess branch was still in production in the 2000s, as used in all the Lexibook computers 10 with 68HC08 compatible microcontrollers 11 12 13 14.
Selected Games
WMCCC 1983, round 1, 65 Cyrus X - LogiChess 2.2 15
[Event "WMCCC 1983"]
[Site "Budapest, Hungary"]
[Date "1983.10.13"]
[Round "1"]
[White "65 Cyrus X"]
[Black "LogiChess 2.2"]
[Result "0-1"]
1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.e3 Nc6 5.Be2 Ne4 6.Nxe4 dxe4 7.c5 Qg5 8.g3 Qf5
9.Bg4 Qd5 10.Bd2 h5 11.Be2 e5 12.Bc3 h4 13.Bb5 hxg3 14.Bxc6+ Qxc6 15.fxg3 Be6
16.h4 b6 17.cxb6 axb6 18.a4 exd4 19.Qxd4 f6 20.Qd1 Bc5 21.Ne2 Bxe3 22.Nd4 Qd6
23.Ne2 Qxd1+ 24.Kxd1 Rxa4 25.Kc2 b5 26.Rxa4 bxa4 27.Bd4 Bh6 28.Nc3 Bb3+ 29.Kb1
f5 30.g4 fxg4 31.Nxe4 O-O 32.Re1 Rf3 33.Ng5 Bxg5 34.hxg5 Rd3 35.g6 Rd1+ 36.Rxd1
Bxd1 37.Kc1 Bf3 38.Kd2 Be4 39.Ke3 Bxg6 40.Be5 c5 41.Kf4 Bh5 42.Kg5 g6 43.Kf6 c4
44.Ke6 c3 45.bxc3 a3 46.c4 a2 47.c5 g3 48.c6 g2 49.Bd4 g1=Q 50.Bxg1 a1=Q 51.Bc5
Bg4+ 52.Kd6 Bf3 53.Bf2 Qd1+ 54.Kc7 Qc1 55.Bg3 Qxc6+ 56.Kd8 Bg4 57.Ke7 Qe6+
58.Kd8 Qd7# 0-1 See also
Forum Posts
- Kaare Danielsen Comparisons by The Spacious Mind, Hiarcs Forum, January 14, 2015
External Links
References
Logichess by the 17-year-old Danish schoolboy Kaare Danielsen was 3rd, from Chess Computers - The UK Story from Chess Computer UK by Mike Watters↩︎
Frederic Friedel (1984). Move from the East. Report of the WMCCC 1983, Personal Computer World, January 1984↩︎
CXG Computachess III from Schachcomputer.info Wiki (German)↩︎
Lexibook Electronic Chess Computers from The Spacious Mind↩︎
Lexibook Travel Chess Explorer Electronic Chess Computer from The Spacious Mind↩︎
Lexibook ChessMan Pro Electronic Chess Computer from The Spacious Mind↩︎
Lexibook Travel Chess from Schachcomputer.info Wiki (German)↩︎
Budapest 1983 - Chess - Round 1 - Game 2 (ICGA Tournaments)↩︎