How it works ? It's simple.
Step 1: Place rubber duck on desk
Step 2: Explain to the duck what your code is supposed to do. Be explicit, work line-by-line, and go into as much detail as necessary.
Step 3: At some point you will tell the duck what you are doing and then you'll realise that is not in fact what you are actually doing.
Math Square is a new type of a game which is simple, but engaging and satisfying.
In empty white squares, place digits so that there are 4 different digits from 1 to 4 in each horizontal row and vertical column.
The numbers on blue squares are a total of all the adjacent, side and corner digits on white squares.