LITS puzzle
LITS — a relatively new logic puzzle, first introduced in 2004. Unlike most Japanese puzzles, it has no symbols; the player works only with tetrominoes (geometric shapes consisting of four squares connected by their sides), shading empty cells on the game board.
From a mathematical point of view, LITS is a binary-definition puzzle, where solving it correctly requires abstract thinking, logic, and attention.
Game history
A true treasure trove of logic puzzles has been, and remains, the Japanese magazine "Nikoli". In the late 20th and early 21st centuries, hundreds of unique puzzles were published in its pages, including LITS, known in Japan as Nuruomino (ヌルオミノ).
The secret behind this incredible creativity lies in the fact that since the late 1980s, the publisher "Nikoli" began involving puzzle enthusiasts among its readers. The editorial office received hundreds of letters with new puzzle ideas, many of which later became hits.
Popular puzzles like Sudoku and Kakuro also gained fame thanks to "Nikoli", not to mention many lesser-known puzzles that became part of the publisher’s collection. The company operated like a true puzzle laboratory, where both staff and readers, often under pseudonyms, created, edited, modified, and perfected puzzles. Many of these puzzles can now be found online in 3–4 different variations.
LITS first appeared in 2004 in issue no. 104 of the magazine "Puzzle Communication Nikoli" under the name Nuruomino. In 2005, in issue no. 112, a revised version was published under the new name LITS, with changes to the rules regarding shading of the 2×2 square tetromino.
LITS quickly gained popularity among readers and spread worldwide with the rise of the internet. In 2011, Grant Fikes created the board game "Battle of LITS" based on this puzzle.
Try playing LITS now — free and without registration — and you’ll never part with this game!
