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a Java-based chess engine that has been developed by Roland Stuckardt. Fischerle implements the UCI protocol. It is recommended to employ it from within the Arena environment. Additionally, Fischerle has an own GUI providing supplementary configuration and testing features; in principle, it can thus be used independently of UCI based chess GUIs. Fischerle is available for download at its author's web pages .


Fischerle’s representation of chess positions is based on the rotated bitboard model. Fischerle employs some well-known techniques of enhanced alpha-beta minimax search:

Transposition table
Evaluation cache
7th rank Passed pawn extensions
Check evasions only by a singular / a few moves
Winning recaptures
Singular extensions (restricted implementation that doesn't apply at Cut nodes and that considers only transposition table moves as singularity candidates the value of which is marked there as exact or lower bound)
extension by several plies at the very moment a pawn endgame is reached
Adaptive Null Move Pruning
Extended Futility Pruning
Limited Razoring

The static evaluation parameters of Fischerle are amenable to external fine tuning based on a concept of so-called efb (evaluation factor block) files, thus enabling the user to influence, within certain bounds, Fischerle’s playing style (e. g. to prefer closed positions, etc.). Fischerle comes with its own, small opening book, covering about 220K positions and some 540K moves. Fischerle supports pondering via its UCI interface.

Latest Version

Fischerle 0.9.80 SE [2] - a slightly more aggressive forward pruning scheme is now applied; quiescence search has been mildly refined (adding, in particular, delta pruning); the piece value assigned to bishops and the bishop pair bonus have been slightly reduced; king safety ealuation has been refined; the mate approaching scheme has been enhanced.


Die Blendung by Doris Neidl [3]

"Ein Mensch, was ka Schach spielt, ist ka Mensch" [4]


Fischerle [5] is named after a famous character of Elias Canetti’s novel „Die Blendung“ („Auto-da-Fé“) [6] [7] , which plays in Vienna [8] around protagonist Peter Kien, a middle-aged philologist and Sinologist: Siegfried Fischerle [9] , a Jewish [10] hunchbacked dwarf and pander, is a chess addict whose dream is it to go to America to challenge chess champion José Raúl Capablanca in order to get rich and famous. Canetti wrote his novel in the years 1930/31, coincidentally more than one decade before Nazi German Oberfeldwebel Siegfried Fischer was decorated with the Knight's Cross of the Iron Cross, Jewish artist and poet Peter Kien died in Auschwitz concentration camp, and more than two decades before chess genius Bobby Fischer entered the international chess scene [11] .

Fischers Fritz

The German tongue-twister "Fischers Fritz fischt frische Fische. Frische Fische fischt Fischers Fritz." (Fisher's Fritz fishes fresh fish, fresh fish are fished by fisher's Fritz) is not related to Fritz Fischer but may be to Fischerle's famous brother Fritz?



See also

Forum Posts


2015 ...

External Links

Chess Engine

Schachengine Fischerle - Techniken im Überblick
Schachengine Fischerle - Benutzeroberfläche


Bobby Fischer from Wikipedia


  1. Ernst A. Heinz (1998). Efficient Interior-Node Recognition. ICCA Journal, Vol. 21, No. 3
  2. Fischerle 0.9.80 SE (March 24, 2017)
  3. Die Blendung - Illustrations - Gallery, capturing the crazy and wondrous journey of Sinologist Peter Kien. Copyright © 2013 by Doris Neidl
  4. "A person who does not play chess, is not a man", direct speech in Viennese German of Fischerle to Kien, in Elias Canetti (1936). Die Blendung. Wien 1936, Editio princeps, p. 191.
  5. Fischerle - Diminutive form of Fischer
  6. Auto-da-fé from Wikipedia
  7. Talk Literature: Auto-da-Fé - Elias Canetti by Lale, February 21, 2010
  8. History of the Jews in Vienna - from Wikipedia
  9. Nicola Riedner (1994). Canettis Fischerle: eine Figur zwischen Masse, Macht und Blendung. Königshausen und Neumann, page 40, footnote 174, Google books, "Peter Jansen behauptet fälschlicherweise, daß Fischerle eigentlich Fischer hieße und nur aufgrund seiner Gestalt das Verkleinerungssuffix durch andere hinzubekommen hätte". Peter Jansen (1980). Die Komik des Sprechens. Zur sprachlich-ästhetischen Erfahrung des Komischen am Beispiel von Canettis Roman "Die Blendung". in Sprache im technischen Zeitalter, 76
  10. further in Nicola Riedner (1994). Canettis Fischerle: eine Figur zwschischen Masse, Macht und Blendung. Königshausen und Neumann, page 41-42, During the time of writing of the novel (1930/31) the German given name Siegfried for Jewish children was indication of Jewish will for assimilation, footnote 179, Konrad Krause (1943). Die jüdische Namenswelt. Essener Verlagsanstalt, Publisher of the Nazi Party, S. 11, "Denn es ist bekannt, in welchem Ausmaß die Juden [...] unsere herrlichen alten Namen z.T. nahezu entwertet haben. Dieses Schicksal erlitten besonders die 'Sieg'namen ..."
  11. Bobby Fischer, whose mother was Jewish, and whose possible biological father was also Jewish, made numerous Anti-semitic statements, see Bobby Fischer - Anti-semitic statements - from Wikipedia
  12. Elias Canetti: Sekundärliteratur (German)
  13. Friedrich Nietzsche from Wikipedia
  14. Jewish question from Wikipedia
  15. German: Willkommen

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