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'''[[Main Page|Home]] * [[People]] * Thomas Dybdahl Ahle'''
[[FILE:ThomasDybdahlAhle.jpg|border|right|thumb|link=https://github.com/thomasahle| Thomas Dybdahl Ahle <ref>[https://github.com/thomasahle thomasahle (Thomas Dybdahl Ahle) · GitHub]</ref> ]]
'''Thomas Dybdahl Ahle''',<br/>
a Danish computer scientist, software developer, and currently post doctoral researcher at Basic Algorithms Research group (BARC) <ref>[https://barc.ku.dk/ BARC – University of Copenhagen]</ref> at [https://en.wikipedia.org/wiki/University_of_Copenhagen University of Copenhagen] <ref>[https://dk.linkedin.com/in/thomasahle Thomas Dybdahl Ahle | LinkedIn]</ref>.
He holds a [https://en.wikipedia.org/wiki/Master_of_Arts#Oxford.2C_Cambridge.2C_Dublin_.28conferred.2C_not_earned.29 Master of Arts] in computer science in 2013 from [https://en.wikipedia.org/wiki/University_of_Oxford University of Oxford],
and Ph.D. in [[Algorithms|algorithms]] and [https://en.wikipedia.org/wiki/Theoretical_computer_science theoretical computer science] from [https://en.wikipedia.org/wiki/University_of_Copenhagen University of Copenhagen].
=Computer Chess=
Thomas Dybdahl Ahle is owner and primary developer of [[PyChess]], a [[GUI|chess client]] and engine for the [[Linux]] desktop. He is further author of the didactic [[Python]] [[:Category:Open Source|open source chess engines]] [[Sunfish]] <ref>[https://www.techradar.com/author/jonni-bidwell Jonni Bidwell] ('''2016'''). ''Python: Sunfish chess engine''. [https://en.wikipedia.org/wiki/Linux_Format Linux Format], [http://www.itu.dk/people/thdy/papers/sunfish.pdf pdf]</ref> and [[Fastchess]], the latter a one-layer [[Neural Networks|neural network]] [https://en.wikipedia.org/wiki/Softmax_function softmax] model, combined with a [[Monte-Carlo Tree Search]].
=Selected Publications=
<ref>[https://dblp.uni-trier.de/pers/hd/a/Ahle:Thomas_D= dblp: Thomas D. Ahle]</ref> <ref>[https://scholar.google.dk/citations?user=aRiVoYgAAAAJ Thomas D. Ahle - Google Scholar Citations]</ref> <ref>[http://www.itu.dk/people/thdy/ Thomas Dybdahl Ahle]</ref>
* [[Thomas Dybdahl Ahle]], [[Mathematician#RPagh|Rasmus Pagh]], [[Mathematician#IRazenshteyn|Ilya Razenshteyn]], [https://dblp.uni-trier.de/pers/hd/s/Silvestri_0001:Francesco Francesco Silvestri] ('''2015'''). ''On the Complexity of Inner Product Similarity Join''. [https://arxiv.org/abs/1510.02824 arXiv:1510.02824]
* [[Thomas Dybdahl Ahle]], [[Mathematician#MAumueller|Martin Aumüller]], [[Mathematician#RPagh|Rasmus Pagh]] ('''2016'''). ''Parameter-free Locality Sensitive Hashing for Spherical Range Reporting''. [https://arxiv.org/abs/1605.02673 arXiv:1605.02673]
* [[Thomas Dybdahl Ahle]] ('''2017'''). ''Optimal Las Vegas Locality Sensitive Data Structures''. [https://arxiv.org/abs/1704.02054 arXiv:1704.02054]
* [[Thomas Dybdahl Ahle]] ('''2017'''). ''Optimal Set Similarity Data-structures Without False Negatives''. Master thesis, [https://en.wikipedia.org/wiki/University_of_Copenhagen University of Copenhagen], [http://www.itu.dk/people/thdy/papers/minhash.pdf pdf]
* [[Thomas Dybdahl Ahle]] ('''2019'''). ''Subsets and Supermajorities: Unifying Hashing-based Set Similarity Search''. [https://arxiv.org/abs/1904.04045 arXiv:1904.04045]
* [[Thomas Dybdahl Ahle]] ('''2019'''). ''Algorithms for Sets''. Ph.D. thesis, [https://en.wikipedia.org/wiki/University_of_Copenhagen University of Copenhagen]
* [[Thomas Dybdahl Ahle]], [https://dblp.uni-trier.de/pers/hd/k/Kapralov:Michael Michael Kapralov], [https://dblp.uni-trier.de/pers/hd/k/Knudsen:Jakob_B=aelig=k_Tejs Jakob B. T. Knudsen], [[Mathematician#RPagh|Rasmus Pagh]], [[Mathematician#AVelingker|Ameya Velingker]], [[Mathematician#DPWoodruff|David P. Woodruff]], [https://dblp.uni-trier.de/pers/hd/z/Zandieh:Amir Amir Zandieh] ('''2019'''). ''Oblivious Sketching of High-Degree Polynomial Kernels''. [https://itu.dk/~thdy/papers/tensorsketch-joint.pdf pdf]
=Postings=
* [https://www.reddit.com/r/programming/comments/1xmj1a/sunfish_a_111_line_chess_engine_in_python/ Sunfish – A 111 line Chess Engine in Python] by [[Thomas Dybdahl Ahle]], [https://en.wikipedia.org/wiki/Reddit reddit], February 16, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=55577 Negative alpha/beta windows: Are they useful?] by [[Thomas Dybdahl Ahle]], [[CCC]], March 06, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=61015 Storing both alpha and beta scores in TT] by [[Thomas Dybdahl Ahle]], [[CCC]], August 02, 2016 » [[Transposition Table]]
* [http://www.talkchess.com/forum/viewtopic.php?t=64972 Approximating Stockfish's Evaluation by PSQTs] by [[Thomas Dybdahl Ahle]], [[CCC]], August 23, 2017 » [[Automated Tuning#Regression|Regression]], [[Piece-Square Tables]], [[Stockfish]]
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=71301&start=8 Re: A question to MCTS + NN experts] by [[Thomas Dybdahl Ahle]], [[CCC]], August 04, 2019
=External Links=
* [http://www.itu.dk/people/thdy/ Thomas Dybdahl Ahle]
* [https://dk.linkedin.com/in/thomasahle Thomas Dybdahl Ahle | LinkedIn]
* [https://mathoverflow.net/users/5429/thomas-dybdahl-ahle User Thomas Dybdahl Ahle] - [https://en.wikipedia.org/wiki/MathOverflow MathOverflow]
* [https://github.com/thomasahle thomasahle (Thomas Dybdahl Ahle) · GitHub]
* [https://scholar.google.dk/citations?user=aRiVoYgAAAAJ Thomas D. Ahle - Google Scholar Citations]
* [https://twitter.com/thomasahle Thomas Dybdahl Ahle (@thomasahle) | Twitter]
=References=
<references />
'''[[People|Up one level]]'''
[[Category:Chess Programmer|Ahle]]
[[Category:Mathematician|Ahle]]
[[FILE:ThomasDybdahlAhle.jpg|border|right|thumb|link=https://github.com/thomasahle| Thomas Dybdahl Ahle <ref>[https://github.com/thomasahle thomasahle (Thomas Dybdahl Ahle) · GitHub]</ref> ]]
'''Thomas Dybdahl Ahle''',<br/>
a Danish computer scientist, software developer, and currently post doctoral researcher at Basic Algorithms Research group (BARC) <ref>[https://barc.ku.dk/ BARC – University of Copenhagen]</ref> at [https://en.wikipedia.org/wiki/University_of_Copenhagen University of Copenhagen] <ref>[https://dk.linkedin.com/in/thomasahle Thomas Dybdahl Ahle | LinkedIn]</ref>.
He holds a [https://en.wikipedia.org/wiki/Master_of_Arts#Oxford.2C_Cambridge.2C_Dublin_.28conferred.2C_not_earned.29 Master of Arts] in computer science in 2013 from [https://en.wikipedia.org/wiki/University_of_Oxford University of Oxford],
and Ph.D. in [[Algorithms|algorithms]] and [https://en.wikipedia.org/wiki/Theoretical_computer_science theoretical computer science] from [https://en.wikipedia.org/wiki/University_of_Copenhagen University of Copenhagen].
=Computer Chess=
Thomas Dybdahl Ahle is owner and primary developer of [[PyChess]], a [[GUI|chess client]] and engine for the [[Linux]] desktop. He is further author of the didactic [[Python]] [[:Category:Open Source|open source chess engines]] [[Sunfish]] <ref>[https://www.techradar.com/author/jonni-bidwell Jonni Bidwell] ('''2016'''). ''Python: Sunfish chess engine''. [https://en.wikipedia.org/wiki/Linux_Format Linux Format], [http://www.itu.dk/people/thdy/papers/sunfish.pdf pdf]</ref> and [[Fastchess]], the latter a one-layer [[Neural Networks|neural network]] [https://en.wikipedia.org/wiki/Softmax_function softmax] model, combined with a [[Monte-Carlo Tree Search]].
=Selected Publications=
<ref>[https://dblp.uni-trier.de/pers/hd/a/Ahle:Thomas_D= dblp: Thomas D. Ahle]</ref> <ref>[https://scholar.google.dk/citations?user=aRiVoYgAAAAJ Thomas D. Ahle - Google Scholar Citations]</ref> <ref>[http://www.itu.dk/people/thdy/ Thomas Dybdahl Ahle]</ref>
* [[Thomas Dybdahl Ahle]], [[Mathematician#RPagh|Rasmus Pagh]], [[Mathematician#IRazenshteyn|Ilya Razenshteyn]], [https://dblp.uni-trier.de/pers/hd/s/Silvestri_0001:Francesco Francesco Silvestri] ('''2015'''). ''On the Complexity of Inner Product Similarity Join''. [https://arxiv.org/abs/1510.02824 arXiv:1510.02824]
* [[Thomas Dybdahl Ahle]], [[Mathematician#MAumueller|Martin Aumüller]], [[Mathematician#RPagh|Rasmus Pagh]] ('''2016'''). ''Parameter-free Locality Sensitive Hashing for Spherical Range Reporting''. [https://arxiv.org/abs/1605.02673 arXiv:1605.02673]
* [[Thomas Dybdahl Ahle]] ('''2017'''). ''Optimal Las Vegas Locality Sensitive Data Structures''. [https://arxiv.org/abs/1704.02054 arXiv:1704.02054]
* [[Thomas Dybdahl Ahle]] ('''2017'''). ''Optimal Set Similarity Data-structures Without False Negatives''. Master thesis, [https://en.wikipedia.org/wiki/University_of_Copenhagen University of Copenhagen], [http://www.itu.dk/people/thdy/papers/minhash.pdf pdf]
* [[Thomas Dybdahl Ahle]] ('''2019'''). ''Subsets and Supermajorities: Unifying Hashing-based Set Similarity Search''. [https://arxiv.org/abs/1904.04045 arXiv:1904.04045]
* [[Thomas Dybdahl Ahle]] ('''2019'''). ''Algorithms for Sets''. Ph.D. thesis, [https://en.wikipedia.org/wiki/University_of_Copenhagen University of Copenhagen]
* [[Thomas Dybdahl Ahle]], [https://dblp.uni-trier.de/pers/hd/k/Kapralov:Michael Michael Kapralov], [https://dblp.uni-trier.de/pers/hd/k/Knudsen:Jakob_B=aelig=k_Tejs Jakob B. T. Knudsen], [[Mathematician#RPagh|Rasmus Pagh]], [[Mathematician#AVelingker|Ameya Velingker]], [[Mathematician#DPWoodruff|David P. Woodruff]], [https://dblp.uni-trier.de/pers/hd/z/Zandieh:Amir Amir Zandieh] ('''2019'''). ''Oblivious Sketching of High-Degree Polynomial Kernels''. [https://itu.dk/~thdy/papers/tensorsketch-joint.pdf pdf]
=Postings=
* [https://www.reddit.com/r/programming/comments/1xmj1a/sunfish_a_111_line_chess_engine_in_python/ Sunfish – A 111 line Chess Engine in Python] by [[Thomas Dybdahl Ahle]], [https://en.wikipedia.org/wiki/Reddit reddit], February 16, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=55577 Negative alpha/beta windows: Are they useful?] by [[Thomas Dybdahl Ahle]], [[CCC]], March 06, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=61015 Storing both alpha and beta scores in TT] by [[Thomas Dybdahl Ahle]], [[CCC]], August 02, 2016 » [[Transposition Table]]
* [http://www.talkchess.com/forum/viewtopic.php?t=64972 Approximating Stockfish's Evaluation by PSQTs] by [[Thomas Dybdahl Ahle]], [[CCC]], August 23, 2017 » [[Automated Tuning#Regression|Regression]], [[Piece-Square Tables]], [[Stockfish]]
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=71301&start=8 Re: A question to MCTS + NN experts] by [[Thomas Dybdahl Ahle]], [[CCC]], August 04, 2019
=External Links=
* [http://www.itu.dk/people/thdy/ Thomas Dybdahl Ahle]
* [https://dk.linkedin.com/in/thomasahle Thomas Dybdahl Ahle | LinkedIn]
* [https://mathoverflow.net/users/5429/thomas-dybdahl-ahle User Thomas Dybdahl Ahle] - [https://en.wikipedia.org/wiki/MathOverflow MathOverflow]
* [https://github.com/thomasahle thomasahle (Thomas Dybdahl Ahle) · GitHub]
* [https://scholar.google.dk/citations?user=aRiVoYgAAAAJ Thomas D. Ahle - Google Scholar Citations]
* [https://twitter.com/thomasahle Thomas Dybdahl Ahle (@thomasahle) | Twitter]
=References=
<references />
'''[[People|Up one level]]'''
[[Category:Chess Programmer|Ahle]]
[[Category:Mathematician|Ahle]]
