Problem Authors

Problem author Problems Average Difficulty
Aarav Singh 2 4.4
Aaron Deever 2 6.1
Aaron Lengyel 5 2.8
A.Augusto de Sousa 1 5.5
Abdullah Zaghmout 1 7.1
Abel Molina 1 4.1
Abe Wits 5 5.6
Abod Abbas 2 2.0
Adam Polak 6 5.6
Adrian Kügel 3 4.8
Adrian Satja Kurdija 18 5.0
Akshay Goel 1 3.9
Alexander Dietsch 5 5.7
Alexander Rass 4 6.4
Alexander Scheel 2 3.3
Alexander Wei 1 5.9
Alex Brodsky 2 4.8
Alex Li 4 5.8
Alex Lind 2 2.9
Alex ten Brink 1 6.0
Aloysius Lim Dewen 2 6.3
Amar Topalovic 2 7.4
Ana Paula Tomás 3 4.7
Andreas Björklund 22 5.8
Andreas Lundblad 3 7.4
Andreas Schuh 1 1.8
André Susano Pinto 2 7.6
Andrew Ahnn 2 2.7
Andrew Baas 1 6.8
Andrew Gove 1 3.7
Andrew Harrington 7 3.9
Andrew Nuxoll 1 4.6
Andrew Stankevich 1 8.0
Andrew Warner 1 6.4
Andriy Katkov 2 3.6
Andy Harrington 2 6.5
Andy Nguyen 3 6.9
Ante Derek 1 5.9
Anthony Han 4 4.6
Anton Grbin 2 7.2
Antonio Jurić 6 4.7
Antti Laaksonen 10 5.4
Arash Behpour 1 3.7
Ariana Herbst 2 6.8
Arkadiusz Pawlik 4 7.9
Arnar Bjarni Arnarson 3 3.3
Arnav Sastry 11 4.5
Arne Alex 3 5.5
Aron Granberg 1 1.9
Arthur van Goethem 2 3.8
Arup Guha 4 5.3
Asger Hautop Drewsen 2 5.8
Atli Fannar Franklín 6 4.3
Babak Behsaz 6 4.2
BAPC jury 2019 1 5.7
Bartholomew Furrow 3 6.1
Bartosz Walczak 2 6.3
Ben Bradshaw 1 6.8
Benjamin Reed 1 2.5
Benjamin Reidys 3 3.6
Ben Zhang 1 7.1
Bergur Snorrason 16 4.6
Birk Tjelmeland 2 5.0
Bjarki Ágúst Guðmundsson 21 5.0
Björn Hegerfors 1 7.2
Björn Magnusson 1 9.3
Björn Martinsson 7 6.4
Boas Kluiving 2 6.2
Boaz Pat-El 4 5.3
Bob Logan 3 4.3
Bob Pilgrim 2 3.8
Bob Roos 20 5.1
Børge Nordli 2 4.9
Bowen Yu 44 6.1
Bo Zhou 2 9.0
Brandon Fuller 15 4.2
Branimir Filipović 3 3.5
Brent Yorgey 1 5.7
Brian Chen 1 2.5
Brook Tamir 1 6.0
Bruce Elenbogen 1 5.4
Bruce S. Elenbogen 1 2.8
Bruno Ploumhans 1 5.5
Bruno Rahle 7 3.4
Bryce Sandlund 6 6.0
Calvin Godfrey 1 6.7
Calvin Li 1 2.0
Chad Mourning 1 2.8
Chan Pak Hay 1 4.1
Chan Pak Hei 1 7.0
Charles L. A. Clarke 1 3.8
Chengyu Lin 3 6.3
Chidambaram Annamalai 1 7.9
Chin Zhan Xiong 1 7.8
Christian Hundt 1 8.0
Christian Jonassen 1 1.5
Christian Ledig 1 4.6
Christian Neverdal Jonassen 2 2.1
Christian Renner 2 4.5
Christoph Dürr 2 5.1
Christopher Raphael 1 5.9
Clark Cucinell 1 2.4
Colin Peppler 1 2.4
Cosmin Negruseri 4 6.4
Daan van Gent 2 6.5
Damian Straszak 2 5.6
Dan Alden Baterisna 2 7.0
Dan Folescu 1 1.8
Daniel Brinkers 2 2.4
Daniel Espling 3 5.8
Daniel Gil 1 1.9
Daniel Lokshtanov 4 6.6
Daniel Moyer 1 2.1
Daniel Paleka 1 8.2
Daniel Robbins 1 7.4
Daniel Stefankovic 5 7.7
Dante Bencivenga 12 4.8
Darcy Best 7 4.0
Darko Aleksic 7 4.2
Dave Hotchkiss 2 2.0
David Arthur 1 7.6
David García Soriano 2 6.5
David Poplawski 1 5.4
David Sturgill 74 3.8
David van Brackle 1 7.3
David Van Brackle 4 6.2
David Venhoek 2 4.5
David Zheng 5 5.1
Deon Nicholas 5 4.8
Derek Kisman 3 7.4
Dillon Cutaiar 1 2.1
Domagoj Bradač 1 5.0
Domagoj Ćevid 2 6.7
Dominik Gleich 17 5.3
Don Reble 3 4.9
ECNA Judging Team 13 5.4
Edbert Geraldy Cangdinata 1 5.7
Ed Skochinski 3 6.3
Eduard Kalinicenko 1 8.1
Edvard Kristoffer Neset Karlsen 1 5.8
Egor Dranischnikow 3 4.4
Eirik Reksten 1 7.3
Emilio Vivancos 1 5.3
Emma Enström 3 2.7
Enrique Martín Martín 1 7.9
Eric Hervet 1 2.0
Eric Shade 1 4.9
Erik Aas 3 7.0
Erik Amirell Eklöf 5 6.7
Erling Alf Ellingsen 1 6.3
Etienne Vouga 13 5.8
Evan Quach 1 3.8
Eyleifur Ingþór Bjarkason 1 4.6
Felix Halim 1 2.5
Filiberto Fuentes 1 7.4
Filip Barl 7 4.1
Florin Ghesu 1 7.1
Francisco Criado 1 4.9
François Aubry 2 4.5
Frane Kurtović 1 5.2
Fredrik Hernqvist 2 4.9
Fredrik Niemelä 2 4.7
Fredrik Svensson 4 6.5
Freyr Bergsteinsson 1 7.7
Gabriela Velazquez-Pergola 1 4.3
Gerben Stavenga 3 6.1
Gilbert Lee 1 5.5
Godmar Back 42 4.0
Goran Gašić 3 5.7
Goran Žužić 9 6.5
Gordon Cormack 1 7.8
Gordon V. Cormack 46 4.9
Graeme Kemkes 1 2.9
Graeme Zinck 2 4.5
Greg Hamerly 99 3.8
Gregor Behnke 6 5.0
Grzegorz Herman 3 7.9
Gu Jin 3 6.9
Gunnar Kreitz 11 5.0
Gustav Kalander 2 9.0
Gustav Matula 1 4.2
Håkan Strömberg 1 2.5
Hans Wennborg 1 5.6
Haochen Chen 4 5.9
Harrison Fang 2 3.4
Harry Smit 9 5.7
Hélène Verhaeghe 1 2.6
Henrik Eriksson 4 3.3
Henry Wang 2 4.9
Henry Xia 4 6.4
Hon Man Hin 3 6.2
Howard Cheng 36 3.9
Howard Whitston 1 1.6
Hubert Teo Hua Kian 3 7.1
Hugo Eberhard 1 6.8
Hung Chun Ho 1 8.6
Ian Munro 1 2.9
Igor Naverniouk 1 5.9
Ioana Ilena 1 5.6
Irina Kostitsyna 1 4.9
Irvan Jahja 8 5.8
Isaac Arvestad 4 4.2
Isaac Lee 2 6.6
Ivan Katanić 6 6.4
Ivan Paljak 7 5.5
Ivona Bezakova 7 6.3
Ivor Page 3 4.3
Jaap Eldering 5 6.2
Jack Rosenthal 3 1.9
Jacob Merizia 1 4.4
Jacob Plachta 3 4.6
Jacques-Henri Jourdan 1 5.3
Jaehyun Park 1 6.7
Jakob Krainz 3 4.9
Jakub Pachocki 2 7.7
Jakub Závodný 1 8.1
Jalal Almhana 1 2.0
James Feher 5 1.9
James Hughes 1 6.3
James R (Bob) Bradley 1 2.0
James Stanley 1 2.7
Jan Elffers 4 5.5
Jan Kuipers 8 6.0
Jan Stoklasa 1 6.7
Jason Pham 1 4.3
Javier Gómez Serrano 3 5.7
Jean-Christophe Filliâtre 1 4.5
Jean Niklas L'orange 22 5.1
Jeff Kinne 1 1.5
Jeffrey Peng 1 5.4
Jennifer Lhoták 1 6.8
Jennifer Shimada 1 6.3
Jeroen Bransen 8 3.8
Jeroen de Jong 1 6.8
Jesper Öqvist 4 5.8
Jiju Poovvancheri 1 2.7
Jim Grimmett 10 5.0
Jimmy Mårdell 20 5.8
Jingbo Shang 8 5.7
Johan Sannemo 110 5.1
John Bonomo 48 4.8
John Cigas 4 1.8
John Dethridge 4 5.8
John Keyser 2 6.7
Jon Ander Gómez 3 5.3
Jonathan Chong 4 4.1
Jon Marius Venstad 10 5.2
Joran van Apeldoorn 1 5.1
Joris van Rantwijk 5 5.5
Jorke de Vlas 5 5.0
Josee Tasse 1 5.2
Josef Cibulka 1 6.7
José Paulo Leal 1 4.0
Joseph Swernofsky 3 4.2
Joshua Moerman 3 6.1
Joshua T. Guerin 9 3.2
Josse van Dobben de Bruyn 7 4.2
Jozef Šiška 1 2.9
Julia Mårtensson 2 4.1
Julian Baldus 1 5.8
Julian Dörfler 1 5.8
Julian Neeleman 1 7.4
Junbin Teng 1 7.3
Justas Klimavičius 1 3.8
Justin Park 1 2.9
Kai Chen 3 4.6
Karl Johan Sande Heimark 9 5.3
Karl Lundstig 1 1.6
Kathleen Ericson 9 3.2
Kent Williams-King 4 6.7
Kristoffer Arnsfelt Hansen 1 5.9
Kristof Unterweger 1 6.0
Kuan Wei Heng 1 3.0
Kwee Lung Sin 3 8.0
Kyle See 2 6.8
Lalitha Kuppa 3 3.4
Lap Chi Lau 1 6.4
Larry D. Pyeatt 2 6.6
Larry Pyeatt 2 3.7
Lars Åström 3 3.7
Lau Lap Chi 1 6.6
Law Wai Hon 2 3.8
Lech Duraj 10 6.1
Lee Chun Yin 1 8.4
Leo Osvald 2 6.4
Leszek Horwath 1 7.4
Leung Kai Man 1 8.5
Lewin Gan 12 6.8
Liam Keliher 23 4.4
Li Cheuk Ting 2 6.9
Loke Gustafsson 1 6.8
Louis Jachiet 1 8.0
Lucas Wood 1 3.8
Luis Hernández Corbato 1 8.8
Luka Kalinovčić 5 5.7
Lukáš Poláček 50 5.6
Łukasz Matylla 1 8.0
Luke Son 1 6.1
Maciej Liskiewicz 1 6.9
Magne Vikjord 3 6.0
Magnus Øian 2 5.5
Mahbubul Hasan 2 6.8
Maj Stenmark 3 2.7
Malcolm Sharpe 11 6.3
Måns Magnusson 10 4.4
Manuel Abellanas 1 8.2
Manuel Freire 1 2.9
Marc Furon 3 5.8
Marc Phua Hsiao Meng 5 6.0
Marcus Isaksson 1 5.7
Marc Vinyals 15 6.2
Margarida Mamede 4 4.9
Marin Tomić 9 5.1
Mario Nakazawa 1 2.0
Marius Andrei 1 6.5
Mark Braganza 1 5.3
Mark Gordon 1 7.4
Marko Berezovsky 7 5.2
Marko Ivanković 10 4.0
Mark Theng Kwang Hui 2 7.8
Markus Dregi 4 6.5
Markus Fanebust Dregi 1 5.0
Markus S. Dregi 4 6.4
Mårten Wiman 5 6.8
Martin Kačer 1 6.7
Martin Macko 1 3.4
Mārtiņš Opmanis 1 9.4
Martin Tran 6 2.6
Mathijs de Weerdt 1 3.3
Matias Holte 1 2.7
Matija Milišić 1 7.9
Mats Petter Pettersson 1 1.3
Mats Petter Wallander 1 9.5
Matt Davison 3 2.6
Matt Fontaine 2 6.1
Matthew Ng Zhen Rui 6 3.8
Matthias Bayerlein 1 4.0
Mattias Akke 5 5.2
Max Wilson 1 2.1
Mees de Vries 27 4.6
Micah Stairs 6 6.4
Michael Bradet-Legris 1 2.4
Michael C Slattery 1 7.3
Michael Goldwasser 7 4.8
Michael Zmuda 1 1.6
Michael Zündorf 1 7.3
Michal Forišek 6 3.0
Michał Pilipczuk 5 4.4
Michał Sapalski 1 7.2
Miguel Araújo 6 5.2
Miguel Oliveira 6 6.6
Mikael Goldmann 17 5.5
Mike Domaratzki 3 5.8
Mike Zmuda 1 3.3
Ming-Yee Iu 1 5.6
Mislav Balunović 14 5.6
Mislav Bradač 3 6.9
Modan Han 6 4.4
Mohammadreza Mohseni 1 8.1
Moritz Kobitzsch 3 5.2
Muhammad Ayaz Dzulfikar 1 3.1
Mykola Protsenko 1 3.3
Nalin Bhardwaj 2 6.5
Nathan Backman 4 3.8
Nathan Mytelka 1 6.8
Neha Kapur 1 1.5
Nguyen Dinh Quang Minh 9 7.7
Nguyen Tan Sy Nguyen 1 5.1
Nicholas Sharp 3 2.1
Nick Wu 9 4.5
Nicolas Hardy 3 3.4
Nicole Hedblom 1 4.8
Nikola Dmitrović 5 1.5
Nikola Pintarić 1 1.3
Nils Barlaug 2 6.9
Nils Grimsmo 5 4.4
Nils Gustafsson 39 5.6
Noah Weninger 12 5.1
Óðinn Eyjólfsson 1 6.0
Olav Røthe Bakken 7 5.0
Olivier Bourgeois 1 2.0
Ómar Högni Guðmarsson 1 1.6
Ondřej Lhoták 43 5.1
Onno Berrevoets 3 2.7
Oskar Haarklou Veileborg 3 4.5
Oskar Werkelin Ahlin 19 4.5
Owen Kaser 2 5.2
Øyvind Grotmol 8 6.9
Øyvind Haarberg 4 4.7
Paco Álvaro 1 7.5
Pål G. Drange 4 6.4
Pål Grønås Drange 8 4.1
Pär Söderhjelm 1 6.1
Paul Wild 9 5.1
Pavel Petrovic 1 5.1
Pawel Gawrychowski 2 7.9
Paweł Idziak 1 2.3
Paweł Komosa 1 7.3
Pedro Guerreiro 3 5.0
Pedro Ribeiro 1 6.8
Pedro Vasconcelos 4 5.0
Pehr Söderman 18 4.4
Peilin Zhong 2 7.4
Per Austrin 114 5.6
Peter Høyer 1 4.7
Peter Kluit 1 8.6
Peter Košinár 1 4.9
Peter Steele 3 7.4
Petr Mitrichev 1 6.4
Petter Elvevoll 2 4.1
Philip Wellnitz 1 5.8
Piotr Micek 1 7.4
Piotr Rudnicki 20 4.4
Piotr Zielinski 1 7.2
Prabhakar Ragde 2 4.9
Rachel Krohn 1 7.6
Ragnar Groot Koerkamp 19 5.3
Ragnar Nevries 1 8.0
Ranald Lam Yun Shao 2 7.1
Raphaël Marinier 2 6.3
Rasmus Pagh 1 5.6
Raymond Kang Seng Ing 1 6.6
Raymond van Bommel 10 4.9
Reinier Schmiermann 3 5.2
Richard Peng 5 5.2
R. Marshall 2 2.8
Robert Hochberg 10 4.9
Robert McGorman 1 2.0
Robert Pilgrim 1 2.4
Robin Christopher Yu 49 7.1
Robin Lee 20 5.4
Roger Henriksson 1 4.3
Rongqi Qiu 2 7.4
Rudy van Vliet 1 5.8
Rujia Liu 5 4.6
Ryan Farrell 2 4.4
Ryan Henning 2 5.5
Ryan Marshall 5 3.6
Saketh Are 1 5.6
Samuel Furman 3 3.4
Samuel Tardieu 1 6.7
Sander Alewijnse 1 9.4
Sander Land 1 7.3
Scott McGowan 1 3.8
Sean McCulloch 3 7.5
Sérgio Crisóstomo 2 3.0
Serikzhan Kazi 1 5.8
Serikzhan S. Kazi 1 3.2
Shafaet Ashraf 1 9.3
Shaheed Ebrahim 1 2.9
Shahriar Manzoor 1 6.5
Shantanu Modak 3 3.7
Shiplu Hawlader 1 4.8
Sidhant Bansal 2 3.5
Sidney Cadot 1 3.3
Sigurður Jens Albertsson 1 1.4
Silviu Maniu 2 3.3
Simon Klein 1 5.7
Simon Lindholm 20 7.3
Sondre Sortland 2 6.9
Sonny Chan 6 4.7
Spencer Pao 1 2.1
Stefan Büttcher 3 5.1
Stefan Kraus 1 3.5
Stefan Pszczolkowski 1 1.7
Stefan Toman 1 2.9
Stein Norheim 7 6.1
Steven Halim 24 4.9
Steven Wijaya 2 7.1
Steven Zeil 11 5.4
Stjepan Glavina 2 5.4
Stjepan Požgaj 1 5.3
Stuart Hansen 1 3.8
Suhendry Effendy 1 1.5
Svetoslav Tzvetkov 1 7.9
Swen Gaudl 1 6.8
Synopsys 3 5.5
Syx Pek 7 5.8
Tähvend Uustalu 1 6.3
Tan Jun An 2 3.2
Thierry Lavoie 3 5.5
Thijs van Ommen 1 7.1
Thomas Beuman 4 7.4
Thomas Lidbetter 7 7.1
Thomasz Idziaszek 1 4.9
Thore Husfeldt 16 4.8
Timon Knigge 19 5.1
Tobias Werth 6 4.3
Tómas Ken Magnússon 4 4.5
Tomas Rokicki 3 5.6
Tom Fuller 1 2.2
Tommy Färnqvist 3 4.3
Tom Rokicki 1 3.0
Tom Verhoeff 1 2.5
Tonko Sabolčec 1 3.5
Tony Cai 12 4.5
Torbjørn Morland 21 4.8
Torstein Strømme 16 4.7
Travis Meade 1 7.9
Troels Bjerre Lund 1 8.0
Troy Vasiga 3 4.0
Truls A. Björklund 1 2.4
Truls Amundsen Bjørklund 1 1.3
Tung Kam Chuen 10 6.6
Ulf Lundström 23 4.7
Ulle Endriss 1 5.2
University of Dallas 1 5.1
Unnar Freyr Erlendsson 2 2.2
Vaibhav Tulsyan 1 4.6
Vamsi Manne 1 2.3
Vegard Sjonfjell 2 3.9
Victor Loh Bo Huai 1 7.4
Victor Song 1 3.5
Vinh Pham 1 4.4
Vladimir Valyukh 3 7.2
Vlado Keselj 1 7.7
Volodymyr Lyubinets 6 5.9
Vuong Hoang Long 2 5.7
Walter Guttmann 1 6.5
Walter Kong 1 7.5
Wenda Qiu 3 5.3
Wenli Looi 9 4.5
William Fiset 4 3.9
William Gan Wei Liang 2 7.3
Wing-Kin Sung 1 7.0
Xiaomin Chen 5 5.2
Xiaoyuan Suo 2 3.5
Xiayuan Suo 1 1.6
Yen Truong 1 8.3
Yingtao Tian 3 5.8
Ylvis 1 2.3
Yuen Chak Fai 2 5.2
Yujie An 2 7.8
Zachary Friggstad 45 4.7
Zachary Geier 1 6.6
Zack Butler 7 4.6
Zhang Guangxuan 3 6.6
Ziyi Tang 2 3.7
Zvonimir Medić 1 6.7