Fill rows and cages
Fill a four-by-four board with 1–4. Each number appears once in every row and column. The outlined cages add another rule: their values must make the target using the operation printed beside it.
Canopy Calc
Getting your game ready…
How to play
Read the operation
Addition and multiplication use all the cells in a cage. Subtraction and division cages have two cells, considered in either order. A division target of 2 can use 2 and 4. A one-cell cage simply tells you that cell’s number.
Leave useful notes
Select a cell, then its number. Notes hold possibilities while you compare cages; erase removes an entry. Notes do not count as a completed answer. Finish when every row, column and cage meets its rule. There is no clock or speed bonus to chase.
Strategy
List a small cage first
A two-cell total often has only a few possible pairs. Write those options, then remove any number already fixed in that row or column. Keep the cage’s possible values separate from deciding which cell receives which member of a pair.
Combine clues
Do not solve every cage in isolation. A number forced in one row may eliminate an option in a neighbouring cage. When a pair could swap positions, leave both options in notes until another row, column or cage settles the order.
About the game
Arithmetic on a small board
Canopy Calc combines ordinary row-and-column number placement with arithmetic groups. Cream tiles and clear cage borders keep the two kinds of clue readable. Six layouts are authored for this version; its name and artwork do not claim another puzzle maker’s branding or affiliation. Completion badges and your puzzle selection are remembered; unfinished changes are not.