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'''[[Main Page|Home]] * [[Engines]] * Hactar'''
'''Hactar''', (hactar)<br/>
a simple [[UCI]] compatible [[:Category:Open Source|open source chess engine]] by [[Jost Triller]],
written in [[Rust]], first released in January 2018 under the [[Massachusetts Institute of Technology#License|MIT license]] <ref>[http://talkchess.com/forum3/viewtopic.php?t=66314 A new chess engine: hactar] by [[Jost Triller]], [[CCC]], January 13, 2018</ref>.
Like its successors [[squared-chess]], [[Googleplex Starthinker]] and [[Nalwald]], hactar is a [[Bitboards|bitboard]] engine and generates [[Sliding Piece Attacks|sliding piece attacks]] [[Kindergarten Bitboards|Kindergarten]] like,
by looking up four pre-calculated line attack arrays, 32-Kbyte each, indexed by square and [[First Rank Attacks#TheOuterSquares|inner six bit]] [[Occupancy of any Line|line occupancy]]
<ref>[https://github.com/tsoj/hactar/blob/master/src/chess_data.rs#L101 hactar/chess_data.rs at master · tsoj/hactar · GitHub]</ref>.
=Etymology=
Hactar appears in [https://en.wikipedia.org/wiki/Life,_the_Universe_and_Everything Life, the Universe and Everything], the third book in the five-volume [https://en.wikipedia.org/wiki/The_Hitchhiker%27s_Guide_to_the_Galaxy Hitchhiker's Guide to the Galaxy] by [[:Category:Douglas Adams|Douglas Adams]] <ref>[https://en.wikipedia.org/wiki/List_of_The_Hitchhiker%27s_Guide_to_the_Galaxy_characters#Hactar List of The Hitchhiker's Guide to the Galaxy characters - Wikipedia]</ref>.
Flexible and imaginative, Hactar was the first computer whose individual components reflected the pattern of the whole. Hactar is assembled and programmed by the Silastic Armourfiends, who then order him to assemble an "Ultimate Weapon." Hactar, receiving no other guidance from the Armourfiends, takes the request literally and builds a supernova bomb which would connect every major sun in the universe through hyperspace, thus causing every star to go supernova. Deciding that he could find no circumstance where such a bomb would be justified, Hactar builds a small defect into it. After discovering the defect, the Armourfiends pulverize Hactar ...
=Features=
<ref>[https://github.com/tsoj/hactar#readme GitHub - tsoj/hactar: hactar is a simple chessengine written in rust]</ref>
==[[Board Representation]]==
* [[Bitboards]]
* [[Kindergarten Bitboards]]
==[[Search]]==
* [[Iterative Deepening]]
* [[Alpha-Beta]] [[Negamax]]
* [[Transposition Table]]
* [[Move Ordering]]
** [[Hash Move]]
** [[MVV-LVA]]
* [[Selectivity]]
** [[Late Move Reductions]]
** [[Quiescence Search]]
==[[Evaluation]]==
* [[Material]]
* [[Mobility]]
* [[Pawn Structure]]
** [[Isolated Pawn]]
** [[Passed Pawn]]
* [[King Safety]]
==Misc==
* [[Perft]]
=See also=
* [[squared-chess]]
* [[Googleplex Starthinker]]
* [[Nalwald]]
=Forum Posts=
* [http://talkchess.com/forum3/viewtopic.php?t=66314 A new chess engine: hactar] by [[Jost Triller]], [[CCC]], January 13, 2018
=External Links=
==Chess Engine==
* [https://github.com/tsoj/hactar GitHub - tsoj/hactar: hactar is a simple chessengine written in rust]
* [https://ccrl.chessdom.com/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=Hactar%200.9.0%2064-bit Hactar 0.9.0 64-bit] in [[CCRL|CCRL Blitz]]
==Misc==
* [https://en.wikipedia.org/wiki/List_of_The_Hitchhiker%27s_Guide_to_the_Galaxy_characters#Hactar List of The Hitchhiker's Guide to the Galaxy characters - Wikipedia]
* [https://sites.google.com/site/h2g2theguide/Index/h/hactar Hactar - The Hitchhiker's Guide to the Galaxy]
* [https://hitchhikers.fandom.com/wiki/Hactar Hactar | Hitchhikers | Fandom]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:MIT]]
[[Category:Rust]]
[[Category:UCI]]
[[Category:PC]]
[[Category:Windows]]
[[Category:Linux]]
[[Category:X64]]
[[Category:Douglas Adams]]
'''Hactar''', (hactar)<br/>
a simple [[UCI]] compatible [[:Category:Open Source|open source chess engine]] by [[Jost Triller]],
written in [[Rust]], first released in January 2018 under the [[Massachusetts Institute of Technology#License|MIT license]] <ref>[http://talkchess.com/forum3/viewtopic.php?t=66314 A new chess engine: hactar] by [[Jost Triller]], [[CCC]], January 13, 2018</ref>.
Like its successors [[squared-chess]], [[Googleplex Starthinker]] and [[Nalwald]], hactar is a [[Bitboards|bitboard]] engine and generates [[Sliding Piece Attacks|sliding piece attacks]] [[Kindergarten Bitboards|Kindergarten]] like,
by looking up four pre-calculated line attack arrays, 32-Kbyte each, indexed by square and [[First Rank Attacks#TheOuterSquares|inner six bit]] [[Occupancy of any Line|line occupancy]]
<ref>[https://github.com/tsoj/hactar/blob/master/src/chess_data.rs#L101 hactar/chess_data.rs at master · tsoj/hactar · GitHub]</ref>.
=Etymology=
Hactar appears in [https://en.wikipedia.org/wiki/Life,_the_Universe_and_Everything Life, the Universe and Everything], the third book in the five-volume [https://en.wikipedia.org/wiki/The_Hitchhiker%27s_Guide_to_the_Galaxy Hitchhiker's Guide to the Galaxy] by [[:Category:Douglas Adams|Douglas Adams]] <ref>[https://en.wikipedia.org/wiki/List_of_The_Hitchhiker%27s_Guide_to_the_Galaxy_characters#Hactar List of The Hitchhiker's Guide to the Galaxy characters - Wikipedia]</ref>.
Flexible and imaginative, Hactar was the first computer whose individual components reflected the pattern of the whole. Hactar is assembled and programmed by the Silastic Armourfiends, who then order him to assemble an "Ultimate Weapon." Hactar, receiving no other guidance from the Armourfiends, takes the request literally and builds a supernova bomb which would connect every major sun in the universe through hyperspace, thus causing every star to go supernova. Deciding that he could find no circumstance where such a bomb would be justified, Hactar builds a small defect into it. After discovering the defect, the Armourfiends pulverize Hactar ...
=Features=
<ref>[https://github.com/tsoj/hactar#readme GitHub - tsoj/hactar: hactar is a simple chessengine written in rust]</ref>
==[[Board Representation]]==
* [[Bitboards]]
* [[Kindergarten Bitboards]]
==[[Search]]==
* [[Iterative Deepening]]
* [[Alpha-Beta]] [[Negamax]]
* [[Transposition Table]]
* [[Move Ordering]]
** [[Hash Move]]
** [[MVV-LVA]]
* [[Selectivity]]
** [[Late Move Reductions]]
** [[Quiescence Search]]
==[[Evaluation]]==
* [[Material]]
* [[Mobility]]
* [[Pawn Structure]]
** [[Isolated Pawn]]
** [[Passed Pawn]]
* [[King Safety]]
==Misc==
* [[Perft]]
=See also=
* [[squared-chess]]
* [[Googleplex Starthinker]]
* [[Nalwald]]
=Forum Posts=
* [http://talkchess.com/forum3/viewtopic.php?t=66314 A new chess engine: hactar] by [[Jost Triller]], [[CCC]], January 13, 2018
=External Links=
==Chess Engine==
* [https://github.com/tsoj/hactar GitHub - tsoj/hactar: hactar is a simple chessengine written in rust]
* [https://ccrl.chessdom.com/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=Hactar%200.9.0%2064-bit Hactar 0.9.0 64-bit] in [[CCRL|CCRL Blitz]]
==Misc==
* [https://en.wikipedia.org/wiki/List_of_The_Hitchhiker%27s_Guide_to_the_Galaxy_characters#Hactar List of The Hitchhiker's Guide to the Galaxy characters - Wikipedia]
* [https://sites.google.com/site/h2g2theguide/Index/h/hactar Hactar - The Hitchhiker's Guide to the Galaxy]
* [https://hitchhikers.fandom.com/wiki/Hactar Hactar | Hitchhikers | Fandom]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:MIT]]
[[Category:Rust]]
[[Category:UCI]]
[[Category:PC]]
[[Category:Windows]]
[[Category:Linux]]
[[Category:X64]]
[[Category:Douglas Adams]]
