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Created page with "'''Home * People * Erik van der Werf''' FILE:ErikvanderWerf.jpg|border|right|thumb|link=https://github.com/evdwerf| Erik van der Werf <ref>[https://github..."
'''[[Main Page|Home]] * [[People]] * Erik van der Werf'''
[[FILE:ErikvanderWerf.jpg|border|right|thumb|link=https://github.com/evdwerf| Erik van der Werf <ref>[https://github.com/evdwerf evdwerf (Erik van der Werf) · GitHub]</ref> ]]
'''Erik van der Werf''',<br/>
a Dutch computer scientist, principal scientist in the [https://en.wikipedia.org/wiki/Hearing_aid hearing aid] industry, and master level [[Go]] player <ref>[http://erikvanderwerf.tengen.nl/ Homepage of Erik van der Werf]</ref>.
He received a M.Sc. degree in [https://en.wikipedia.org/wiki/Applied_physics applied physics] from [[Delft University of Technology]] in 1999, and defended his Ph.D. thesis on [[Artificial Intelligence|artificial intelligence]] for the gameof [[Go]] at [[Maastricht University]] in 2005 under supervision of [[Jaap van den Herik]] and [[Jos Uiterwijk]].
Erik van der Werf is author of the [[Go]] playing programs [https://www.game-ai-forum.org/icga-tournaments/program.php?id=137 Magog] (started with [[Levente Kocsis]] and [[Mark Winands]]) <ref>[http://erikvanderwerf.tengen.nl/magog.html Magog]</ref>, [https://www.game-ai-forum.org/icga-tournaments/program.php?id=519 Steenvreter] <ref>[http://erikvanderwerf.tengen.nl/steenvreter.html About Steenvreter]</ref> and GridMaster <ref>[http://erikvanderwerf.tengen.nl/gridmaster.html About GridMaster]</ref>.
His Mini Go Solver ''Migos'' solved 5x5 Go in 2002 <ref>[http://erikvanderwerf.tengen.nl/5x5/5x5solved.html 5x5 Go is solved] October 20,2002</ref>,
using [[Iterative Deepening|iterative deepening]] [[Alpha-Beta|alpha-beta]] search ([[Principal Variation Search|PVS]]), with [[Transposition Table|transposition tables]], [[Enhanced Transposition Cutoff|enhanced transposition cut-offs]],
two [[Killer Move|killer moves]], [[History Heuristic|history heuristic]], Benson's algorithm for unconditional [https://en.wikipedia.org/wiki/Life_and_death live] <ref>[https://senseis.xmp.net/?BensonsDefinitionOfUnconditionalLife%2FVersion20100208 Benson's Definition of Unconditional Life / Version 20100208 at Sensei's Library]</ref> <ref>[[David B. Benson]] ('''1976''). ''Life in the Game of Go''. [https://en.wikipedia.org/wiki/Information_Sciences_(journal) Information Sciences], Vol. 10, [https://webdocs.cs.ualberta.ca/~games/go/seminar/2002/020717/benson.pdf pdf]</ref>, and domain specific evaluation heuristics, futher elaborated in his Ph.D. thesis and [[ICGA Journal]] papers.
=Selected Publications=
<ref>[http://ilk.uvt.nl/icga/journal/docs/References.pdf ICGA Reference Database] (pdf)</ref> <ref>[http://erikvanderwerf.tengen.nl/publications.html Publications of Erik van der Werf]</ref> <ref>[https://dblp.org/pers/hd/w/Werf:Erik_C=_D=_van_der dblp: Erik C. D. van der Werf]</ref>
==1999==
* [[Erik van der Werf]] ('''1999'''). ''Non-linear target based feature extraction by diabolo networks.'' Masters thesis. Pattern Recognition Group, Department of Applied Physics, Faculty of Applied Sciences, [[Delft University of Technology]], [http://erikvanderwerf.tengen.nl/pubdown/diabolic_thesis.pdf pdf]
==2000 ...==
* [[Erik van der Werf]], [[Jaap van den Herik]] ('''2001'''). ''Visual Learning in Go''. [[6th Computer Olympiad#Workshop|6th Computer Olympiad Workshop]], [http://erikvanderwerf.tengen.nl/pubdown/visual_learning_in_go.pdf pdf]
* [[Erik van der Werf]] ('''2002'''). ''GO4++ wins 9x9 Go tournament''. [[ICGA Journal#25_3|ICGA Journal, Vol. 25, No. 3]] » [[7th Computer Olympiad#Go9x9|7th Computer Olympiad]]
* [[Erik van der Werf]] ('''2002'''). ''Solving Ponnuki-Go on Small Boards''. [[7th Computer Olympiad#Workshop|7th Computer Olympiad Workshop]]
* [[Erik van der Werf]], [[Jos Uiterwijk]], [[Jaap van den Herik]] ('''2002'''). ''Solving Ponnuki-Go on Small Boards''. BNAIC’02, [http://erikvanderwerf.tengen.nl/pubdown/Solving_Ponnuki-Go_BNAIC2002.pdf pdf]
* [[Erik van der Werf]], [[Jos Uiterwijk]], [[Eric Postma]], [[Jaap van den Herik]] ('''2002'''). ''[https://link.springer.com/chapter/10.1007%2F978-3-540-40031-8_26 Local Move Prediction in Go]''. [[CG 2002]]
* [[Erik van der Werf]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2003'''). ''Solving Go on Small Boards''. [[ICGA Journal#26_2|ICGA Journal, Vol. 26, No. 2]], [http://erikvanderwerf.tengen.nl/pubdown/solving_go_on_small_boards.pdf pdf]
* [[Erik van der Werf]] ('''2003'''). ''Aya wins 9x9 Go tournament''. [[ICGA Journal#26_4|ICGA Journal, Vol. 26, No. 4]] » [[8th Computer Olympiad#Go9x9|8th Computer Olympiad]]
* [[Erik van der Werf]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2003'''). ''Learning to Score Final Positions in the Game of Go''. [[Advances in Computer Games 10]], [http://erikvanderwerf.tengen.nl/pubdown/learning_to_score.pdf pdf]
* [[Mark Winands]], [[Jaap van den Herik]], [[Jos Uiterwijk]], [[Erik van der Werf]] ('''2003'''). ''[https://research.tilburguniversity.edu/en/publications/enhanced-forward-pruning Enhanced forward pruning]''. JCIS 2003
* [[Erik van der Werf]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2004'''). ''[https://link.springer.com/chapter/10.1007/11674399_6 Learning to Estimate Potential Territory in the Game of Go]''. [[CG 2004]], [http://erikvanderwerf.tengen.nl/pubdown/predicting_territory.pdf pdf]
* [[Mark Winands]], [[Erik van der Werf]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2004'''). ''[https://link.springer.com/chapter/10.1007/11674399_18 The Relative History Heuristic]''. [[CG 2004]], [http://erikvanderwerf.tengen.nl/pubdown/relhis.pdf pdf]
==2005 ...==
* [[Erik van der Werf]] ('''2005'''). ''AI techniques for the game of Go''. Ph.D. thesis, [[Maastricht University]], [http://erikvanderwerf.tengen.nl/pubdown/thesis_erikvanderwerf.pdf pdf]
* [[Mark Winands]], [[Jaap van den Herik]], [[Jos Uiterwijk]], [[Erik van der Werf]] ('''2005'''). ''Enhanced Forward Pruning''. [https://en.wikipedia.org/wiki/Information_Sciences_(journal) Information Sciences], Vol. 175, No. 4, [http://erikvanderwerf.tengen.nl/pubdown/Enhanced%20forward%20pruning.pdf pdf preprint]
* [[Erik van der Werf]], [[Mark Winands]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2005'''). ''Learning to predict life and death from Go game records''. [https://en.wikipedia.org/wiki/Information_Sciences_(journal) Information Sciences], Vol. 175, No. 4
* [[Erik van der Werf]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2005'''). ''Learning to score final positions in the game of Go''. [https://en.wikipedia.org/wiki/Theoretical_Computer_Science_(journal) Theoretical Computer Science], Vol. 349, No. 2, [http://erikvanderwerf.tengen.nl/pubdown/learning_to_score_extended.pdf pdf preprint]
* [[Erik van der Werf]] ('''2007'''). ''Steenvreter wins 9x9 Go tournament''. [[ICGA Journal#30_2|ICGA Journal, Vol. 30, No. 2]] » [[12th Computer Olympiad#Go9x9|12th Computer Olympiad]]
* [[Erik van der Werf]], [[Mark Winands]] ('''2009'''). ''Solving Go for Rectangular Boards''. [[ICGA Journal#32_2|ICGA Journal, Vol. 32, No. 2]], [http://erikvanderwerf.tengen.nl/pubdown/SolvingGoICGA2009.pdf pdf]
=External Links=
* [http://erikvanderwerf.tengen.nl/ Homepage of Erik van der Werf]
* [https://www.game-ai-forum.org/icga-tournaments/person.php?id=149 Erik van der Werf's ICGA Tournaments]
* [http://www.computer-go.info/db/operson.php?a=van+der+Werf%2C+Erik van der Werf, Erik] from [http://www.computer-go.info/ computer-go.info]
* [https://github.com/evdwerf evdwerf (Erik van der Werf) · GitHub]
=References=
<references />
'''[[People|Up one level]]'''
[[Category:Go Player|Werf]]
[[Category:Go Programmer|Werf]]
[[FILE:ErikvanderWerf.jpg|border|right|thumb|link=https://github.com/evdwerf| Erik van der Werf <ref>[https://github.com/evdwerf evdwerf (Erik van der Werf) · GitHub]</ref> ]]
'''Erik van der Werf''',<br/>
a Dutch computer scientist, principal scientist in the [https://en.wikipedia.org/wiki/Hearing_aid hearing aid] industry, and master level [[Go]] player <ref>[http://erikvanderwerf.tengen.nl/ Homepage of Erik van der Werf]</ref>.
He received a M.Sc. degree in [https://en.wikipedia.org/wiki/Applied_physics applied physics] from [[Delft University of Technology]] in 1999, and defended his Ph.D. thesis on [[Artificial Intelligence|artificial intelligence]] for the gameof [[Go]] at [[Maastricht University]] in 2005 under supervision of [[Jaap van den Herik]] and [[Jos Uiterwijk]].
Erik van der Werf is author of the [[Go]] playing programs [https://www.game-ai-forum.org/icga-tournaments/program.php?id=137 Magog] (started with [[Levente Kocsis]] and [[Mark Winands]]) <ref>[http://erikvanderwerf.tengen.nl/magog.html Magog]</ref>, [https://www.game-ai-forum.org/icga-tournaments/program.php?id=519 Steenvreter] <ref>[http://erikvanderwerf.tengen.nl/steenvreter.html About Steenvreter]</ref> and GridMaster <ref>[http://erikvanderwerf.tengen.nl/gridmaster.html About GridMaster]</ref>.
His Mini Go Solver ''Migos'' solved 5x5 Go in 2002 <ref>[http://erikvanderwerf.tengen.nl/5x5/5x5solved.html 5x5 Go is solved] October 20,2002</ref>,
using [[Iterative Deepening|iterative deepening]] [[Alpha-Beta|alpha-beta]] search ([[Principal Variation Search|PVS]]), with [[Transposition Table|transposition tables]], [[Enhanced Transposition Cutoff|enhanced transposition cut-offs]],
two [[Killer Move|killer moves]], [[History Heuristic|history heuristic]], Benson's algorithm for unconditional [https://en.wikipedia.org/wiki/Life_and_death live] <ref>[https://senseis.xmp.net/?BensonsDefinitionOfUnconditionalLife%2FVersion20100208 Benson's Definition of Unconditional Life / Version 20100208 at Sensei's Library]</ref> <ref>[[David B. Benson]] ('''1976''). ''Life in the Game of Go''. [https://en.wikipedia.org/wiki/Information_Sciences_(journal) Information Sciences], Vol. 10, [https://webdocs.cs.ualberta.ca/~games/go/seminar/2002/020717/benson.pdf pdf]</ref>, and domain specific evaluation heuristics, futher elaborated in his Ph.D. thesis and [[ICGA Journal]] papers.
=Selected Publications=
<ref>[http://ilk.uvt.nl/icga/journal/docs/References.pdf ICGA Reference Database] (pdf)</ref> <ref>[http://erikvanderwerf.tengen.nl/publications.html Publications of Erik van der Werf]</ref> <ref>[https://dblp.org/pers/hd/w/Werf:Erik_C=_D=_van_der dblp: Erik C. D. van der Werf]</ref>
==1999==
* [[Erik van der Werf]] ('''1999'''). ''Non-linear target based feature extraction by diabolo networks.'' Masters thesis. Pattern Recognition Group, Department of Applied Physics, Faculty of Applied Sciences, [[Delft University of Technology]], [http://erikvanderwerf.tengen.nl/pubdown/diabolic_thesis.pdf pdf]
==2000 ...==
* [[Erik van der Werf]], [[Jaap van den Herik]] ('''2001'''). ''Visual Learning in Go''. [[6th Computer Olympiad#Workshop|6th Computer Olympiad Workshop]], [http://erikvanderwerf.tengen.nl/pubdown/visual_learning_in_go.pdf pdf]
* [[Erik van der Werf]] ('''2002'''). ''GO4++ wins 9x9 Go tournament''. [[ICGA Journal#25_3|ICGA Journal, Vol. 25, No. 3]] » [[7th Computer Olympiad#Go9x9|7th Computer Olympiad]]
* [[Erik van der Werf]] ('''2002'''). ''Solving Ponnuki-Go on Small Boards''. [[7th Computer Olympiad#Workshop|7th Computer Olympiad Workshop]]
* [[Erik van der Werf]], [[Jos Uiterwijk]], [[Jaap van den Herik]] ('''2002'''). ''Solving Ponnuki-Go on Small Boards''. BNAIC’02, [http://erikvanderwerf.tengen.nl/pubdown/Solving_Ponnuki-Go_BNAIC2002.pdf pdf]
* [[Erik van der Werf]], [[Jos Uiterwijk]], [[Eric Postma]], [[Jaap van den Herik]] ('''2002'''). ''[https://link.springer.com/chapter/10.1007%2F978-3-540-40031-8_26 Local Move Prediction in Go]''. [[CG 2002]]
* [[Erik van der Werf]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2003'''). ''Solving Go on Small Boards''. [[ICGA Journal#26_2|ICGA Journal, Vol. 26, No. 2]], [http://erikvanderwerf.tengen.nl/pubdown/solving_go_on_small_boards.pdf pdf]
* [[Erik van der Werf]] ('''2003'''). ''Aya wins 9x9 Go tournament''. [[ICGA Journal#26_4|ICGA Journal, Vol. 26, No. 4]] » [[8th Computer Olympiad#Go9x9|8th Computer Olympiad]]
* [[Erik van der Werf]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2003'''). ''Learning to Score Final Positions in the Game of Go''. [[Advances in Computer Games 10]], [http://erikvanderwerf.tengen.nl/pubdown/learning_to_score.pdf pdf]
* [[Mark Winands]], [[Jaap van den Herik]], [[Jos Uiterwijk]], [[Erik van der Werf]] ('''2003'''). ''[https://research.tilburguniversity.edu/en/publications/enhanced-forward-pruning Enhanced forward pruning]''. JCIS 2003
* [[Erik van der Werf]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2004'''). ''[https://link.springer.com/chapter/10.1007/11674399_6 Learning to Estimate Potential Territory in the Game of Go]''. [[CG 2004]], [http://erikvanderwerf.tengen.nl/pubdown/predicting_territory.pdf pdf]
* [[Mark Winands]], [[Erik van der Werf]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2004'''). ''[https://link.springer.com/chapter/10.1007/11674399_18 The Relative History Heuristic]''. [[CG 2004]], [http://erikvanderwerf.tengen.nl/pubdown/relhis.pdf pdf]
==2005 ...==
* [[Erik van der Werf]] ('''2005'''). ''AI techniques for the game of Go''. Ph.D. thesis, [[Maastricht University]], [http://erikvanderwerf.tengen.nl/pubdown/thesis_erikvanderwerf.pdf pdf]
* [[Mark Winands]], [[Jaap van den Herik]], [[Jos Uiterwijk]], [[Erik van der Werf]] ('''2005'''). ''Enhanced Forward Pruning''. [https://en.wikipedia.org/wiki/Information_Sciences_(journal) Information Sciences], Vol. 175, No. 4, [http://erikvanderwerf.tengen.nl/pubdown/Enhanced%20forward%20pruning.pdf pdf preprint]
* [[Erik van der Werf]], [[Mark Winands]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2005'''). ''Learning to predict life and death from Go game records''. [https://en.wikipedia.org/wiki/Information_Sciences_(journal) Information Sciences], Vol. 175, No. 4
* [[Erik van der Werf]], [[Jaap van den Herik]], [[Jos Uiterwijk]] ('''2005'''). ''Learning to score final positions in the game of Go''. [https://en.wikipedia.org/wiki/Theoretical_Computer_Science_(journal) Theoretical Computer Science], Vol. 349, No. 2, [http://erikvanderwerf.tengen.nl/pubdown/learning_to_score_extended.pdf pdf preprint]
* [[Erik van der Werf]] ('''2007'''). ''Steenvreter wins 9x9 Go tournament''. [[ICGA Journal#30_2|ICGA Journal, Vol. 30, No. 2]] » [[12th Computer Olympiad#Go9x9|12th Computer Olympiad]]
* [[Erik van der Werf]], [[Mark Winands]] ('''2009'''). ''Solving Go for Rectangular Boards''. [[ICGA Journal#32_2|ICGA Journal, Vol. 32, No. 2]], [http://erikvanderwerf.tengen.nl/pubdown/SolvingGoICGA2009.pdf pdf]
=External Links=
* [http://erikvanderwerf.tengen.nl/ Homepage of Erik van der Werf]
* [https://www.game-ai-forum.org/icga-tournaments/person.php?id=149 Erik van der Werf's ICGA Tournaments]
* [http://www.computer-go.info/db/operson.php?a=van+der+Werf%2C+Erik van der Werf, Erik] from [http://www.computer-go.info/ computer-go.info]
* [https://github.com/evdwerf evdwerf (Erik van der Werf) · GitHub]
=References=
<references />
'''[[People|Up one level]]'''
[[Category:Go Player|Werf]]
[[Category:Go Programmer|Werf]]
