SOME SUM 2 - Must click the Flag to start. The problem/puzzle is explained on the Stage. Click a Red button to place its Number in a Purple Cell. Click a Purple Circle to select the Cell to put it in. Click (Reset) to reset the whole puzzle. Click (Cloud List) to toggle its display on/off. You can't select a number already in another Cell ! This can prove an issue if you want to put a number already in a Cell, somewhere else, or swap 2 numbers. You'll need to Clear it (blank Red button) first (or one of the 2 if swapping) so you can select it to go elsewhere, or just click (Reset) to start again. There is only one solution to this problem! Without knowing the solution I solved it, before creating this project, with pen & paper using systematic trial & error, in less than 5 minutes. Good luck and ENJOY! PS: If you solve it, you're a Scratcher and you don't "See Inside" at the code (it wouldn't help you solve it anyway because the only way it knows whether or not you've solved it, is the same way you do), you will be added to the Cloud List of people who have solved it. PPS: Since this appears to be the easiest of my Cloud List puzzle projects to solve, I have extended it to use all 10 allowed Cloud Variables, meaning it can support a list of up to 60 usernames.
Created by @gregatku, for my own interest mainly. I found the puzzle on the Internet, but I won't reveal the source because that source tells you the solution, and if you know the solution the puzzle is no fun at all! I called the puzzle Some Sum 2, after my Some Sum project ( https://scratch.mit.edu/projects/328189870/ ) which I used as a template for this one. It facilitates the same type of "systematic trial & error" method for solving the problem. It would be very time-consuming, difficult & perhaps impossible, to solve mathematically. For the record when I found this problem, I solved it with pen & paper, before I looked at the solution provided by the source material. The method there was much more laborious and time-consuming than my method (but perhaps more thorough) and it did prove that there was only one solution. With my simpler but in some ways similar approach, I was very confident the solution I found in less than 5 minutes was the only solution, but I didn't bother to try to prove it. If you solved this puzzle you might well like to try the original Some Sum puzzle that I used as the template for creating this one. However, you may not enjoy the experience, because it is very much harder than this!
