[ducktective]

Nice find!

Seems to be similar to a game called Kakuro. This [1] repo even contains a similar rule:

> The algorithm exceed the rules that the sum over a row must equal to the value on the left and the sum over a column must be equal to the value on the bottom of the cells with the diagonal and one or two numbers

[1]: https://github.com/MarioBonse/KakuroSolverCSP

[2]: https://github.com/topics/kakuro

[hgsgm]

That's the first thing ChatGPT said at the start of the whole process. It created a game like Kakuro.