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Excel, (Fidelity Excel, 68000 Mach I, 68000 Mach II, 68000 Mach III, 68020 Mach IV)
a family of the dedicated Chess Challenger series by Fidelity Electronics, produced and distributed from 1987 to 1989. The Excel had a 16-bit Sargon III based 68000 program by Dan and Kathe Spracklen, and was the first dedicated unit featuring a transposition table apparently with BCH hashing of < 16 KiB, 128 KiB for the Mach II, 64 KiB for the Mach III, 512 KiB for the 68020 Mach IV. Due to TTs, the Excel could solve the Lasker-Reichhelm Position in under a minute, but had some issues with color flipped positions, f. i. in KBNK [1]. The Mach III and its successor, the 68020 32-bit Mach IV were also shipped in other housings, such as the Elite Avant Garde V2 [2] and Avant Garde V6 [3], and the later Fidelity Designer models [4] [5].
Excel 68000 [6]

Master Rating

The 68000 Mach III was rated 2265 by the United States Chess Federation`s Computer Rating Agency, an independent certifying body. The computer obtained that Master rating by competing 48 tournament games against rated players [7]. The German Schach-computer Info Wiki mentions an (old) SSDF rating of 1993 [8] [9].
Mach III Rating Certificate [10]

See also

Selected Publications

Forum Posts

External Links

Chess Computer



  1. ^ Fidelity Excel 68000 from Schachcomputer.info Wiki (German)
  2. ^ Fidelity Elite V2 from Schachcomputer.info Wiki (German)
  3. ^ Fidelity Elite V6 from Schachcomputer.info Wiki (German)
  4. ^ Fidelity Designer 2265 Master from Schachcomputer.info Wiki (German)
  5. ^ Fidelity Designer 2325 Master from Schachcomputer.info Wiki (German)
  6. ^ Flickr - Fotosharing - 2. Fidelity by Chewbanta
  7. ^ Thorsten Czub (1989). Er weiß, was er weiß - Der Mach III Master glänzt mit Wissen und Geschwindigkeit. Computerschach und Spiele Heft 2 April-Mai 1989, hosted by Schachcomputer.info Wiki (German)
  8. ^ Fidelity Excel Mach III from Schachcomputer.info Wiki (German)
  9. ^ Wiki-Elo-Liste from Schachcomputer.info Wiki
  10. ^ Flickr - Fotosharing - 2. Fidelity by Chewbanta

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