Our contributors

Andrey Bogdanov

Russian puzzle and sudoku champion, winner of other competitions.
Supports internet site of Russian puzzle club Diogen. Contributed puzzles and participated in organization of few WPCs. Also has authored two books of puzzles.

Puzzles

304

Vladimir Portugalov

Winner of Russian puzzle and sudoku championships and Moscow Cup competitions. Member of Belarus team at World Puzzle Championships and World Sudoku Championships.
Supports Forsmarts project. Contributed puzzles and participated in organization of few World Puzzle Championships and other international competitions.
Invented many new puzzle types some of which become classical.

Puzzles

142

O-le_o-le (Aleksei Oleshov)

The northmost puzzle lover. Three time winner of Russian puzzle championships. Member of Russian team at World Puzzle Championships.
Chairman of charity foundation "Est' reshenie!" which focuses on puzzlesport development in Russia and sponsoring Russian Puzzle championships.

Puzzles

54

Dmitry Grishchenko

Third year PhD student at Université Grenoble Alpes.
Interested in optimization algorithms for large-scale applications, more precisely in first-order ones that are focused on sparsification of communications in distributed setting.
A member of Russian first team in different logic puzzles and sudoku competitions.
grishchenko.org

Puzzles

43

GD (Diana Grigoreva)

Prizewinner of Russian sudoku championships and international sudoku tournaments. Member of Russian team at World Puzzle and Sudoku Championships.
Included in the Guinness Book of World Records record for the largest multi-sudoku puzzles.

Puzzles

25

yanast (Anastasiya Каlinina)

Teacher of math groups for junior school students. Co-author of the book "Mathematics in your hands" and math Olympiads.

Puzzles

17

Anurag Sahay

Puzzle author and inventor who is also a regular at puzzle contests.

Puzzles

15

mrw (Markus Roth)

Seven-time Swiss Puzzle Champion. Member of the Swiss team at every World Puzzle Championship since 2009.
Chairman of the Swiss Logic Puzzle Federation

Puzzles

14

Иван Грищенко

Prizewinner of Russian puzzle championships. Member of Russian team at World Puzzle Championships.
iogri@mail.ru

Puzzles

11

IHNN (Jeffrey Bardon)

A speedrunner turned puzzle enthusiast aspiring to a spot on the US WPC team. The favorite puzzle types include Cave and Sashigane.
Most of Jeffrey's puzzles can be found here: ihnnpuzzles.blogspot.com

Puzzles

8

Eugene (Evgenii Bekishev)

Prizewinner of Russian puzzle championships. Member of Russian team at World Puzzle Championships. bekishevei@gmail.com

Puzzles

7