General Overview

1
Press one of this numbers to insert them into one free field.
2
The list of summations horizontal the solved fields have to match.
3
The list of summations vertical the solved fields have to match.
4
Generates a new game.
5
Resolves one of the empty field.
6
Check your current solution is right.
7
Time since you have started the game.
8
Press one of this empty fields to include a number you have selected in #1.

Rules

Japsum is a kind of logic puzzle very similar to kakuro with the main difference that the empty fields are not known and have to be solved too.
  • A number can only appear once in a row and column.
  • The numbers in a row or column have to result the summations on the left and top.
  • Every summation is a group of numbers seperated by a empty field.
  • A sum can also be a single number.
Also known as ... Cross Sum Puzzle, Cross Sum Game, Logic Game, Logic Puzzle, Math Game, Mathematic Game, Cross Addition