Joker IT

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[ A Joker card [1] Joker,

a Chess Engine Communication Protocol compliant chess engine by Manlio Morini, developed from 1998 until 2001, written in C++ with some conditional x86 inline assembly concerning population count and bitscan of bitboards. Joker runs under BSD, Linux and Windows, and was in 2017 published on GitHub as open source as “historical” artifact, under the terms of the MIT license [2].

Features#

Board Representation

• Bitboards

Search

• Iterative Deepening
• PVS Alpha-Beta
• Aspiration Windows
• Transposition Table
• History Heuristic
• Killer Heuristic
• Null Move Pruning
• Fractional Extensions
• Internal Iterative Deepening
• Quiescence Search
• MVV/LVA

Evaluation

• Material
• Lazy Evaluation
• Pawn Hash Table
• Pawn Structure
• King Safety

Misc#

• Opening Book
• Book Learning
• Nalimov Tablebases

Namesake#

• Joker by Marc-François Baudot and Jean-Christophe Weill
• Joker by Harm Geert Muller

See also#

• Jester by Stéphane Nguyen
• Jester by Marty Franz

Forum Posts#

• Joker (WB) by Manlio Morini by Norbert Raimund Leisner, CCC, September 12, 2017

External Links#

Chess Engine#

• Joker - EOS Development
• GitHub - morinim/joker: A chess engine from ’90s

Misc#

• Joker disambiguation page from Wikipedia
• Joker (playing card) from Wikipedia
• Joker (comics) from Wikipedia
• Joker (comic book) from Wikipedia
• Gata Jazz Quartet - The Joker, YouTube Video

References#

1. ↑ The Jolly Rosso, image by Trocche100, November 30, 2014, Joker (playing card) from Wikipedia, Wikimedia Commons
2. ↑ joker/README.md at master · morinim/joker · GitHub
3. ↑ joker/history at master · morinim/joker · GitHub
4. ↑ joker/giocatore.cc at master · morinim/joker · GitHub, see Ricerca_radice (root search)
5. ↑ Code snippets from joker/situazione.cc at master · morinim/joker · GitHub, slightly formatted concerning white spaces and brackets

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