Str8ts is a logic-based number-placement puzzle, invented by Jeff Widderich in 2008. It is distinct from, but shares some properties and rules with, Sudoku...

Sudoku Hashiwokakero Hidato KenKen List of Nikoli puzzle types Nonogram Str8ts Grossman, Lev (Mar 11, 2013). "The Answer Men". Time. New York. Archived...

Fifteen Puzzle Kakuro Rubik's Cube and other sequential movement puzzles Str8ts a number puzzle based on sequences Sudoku Sujiko Think-a-Dot Tower of Hanoi...