Inshi no heya
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Inshi no heya ( 因子の部屋 ; lit. "factoring rooms") is a type of logic puzzle published by Nikoli.
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[edit] Rules
Inshi no heya is played on a rectangular grid with no standard size, broken into "rooms" by heavier borders. One of every room's dimensions will be a single cell; the length or width of the room varying by room.
Each room may run either horizontally or vertically, and has a small number appearing in its uper left corner.
The puzzle starts with all the cells empty.
The goal is to fill all the cells with nonzero single-digit numbers (1 through 9) such that:
- The numbers in each room, when multiplied together, equal the product in the upper left corner of the room
- No number appears twice in a column or row
[edit] Solution methods
[edit] History
Inshi no heya first appeared in Puzzle Communication Nikoli #92. Although the creator named the puzzle insū bunkai (factorization), the editor replaced it with inshi no heya, which sounds less technical. It irregularly appears in the magazine since #109.
