Japanese competitors showed off their brainpower in bringing home titles in the recent World Puzzle Championship and World Sudoku Championship. At the World Puzzle Championship (WPC), in which ...

A Japan-U.S. research team on March 10 offered a mathematical proof that "Dudeney's dissection," a challenge to cut an ...

TOKYO (AP) — Maki Kaji, the creator of the popular numbers puzzle Sudoku whose life's work was spreading the joy of puzzles, has died, his Japanese company said Tuesday. He was 69 and had bile ...

Tonan Kamata, center, and Ryuhei Uehara, right, of the Japan Advanced Institute of Science ... who was also a puzzle maker, in a magazine's puzzle column in 1902. While many answers were submitted ...