The objective of the "Easy as ABC" brain puzzle ("letterraam" in Dutch) is to fill each row and column in the grid with n unqique letters (ABC...) while leaving m empty cells. The letters on the side tell you which letters are seen first (skipping empty spaces, of course).
This demo hooks up a finite domain solver to search for a solution and present it to you for a given puzzle. If it doesn't give you a solution there probably isn't one (or there's a bug).
By Peter van der Zee, © pvdz.ee, September 2016.
Width and height set the width and height of the puzzle. You can clear the values of the grouping/values. The solve button will (re-)solve with current inputs. You can get as many solutions as you want, if there are more than one, by increasing the max.
Click on a cell to change it. Create groups by assigning their ids to each cell. Press up/down key for quick inc/dec. Assign required values for the puzzle the same way. They are basically the initial values for the puzzle.
These are the solutions, if anything, trying to solve the puzzle. If there is no solution, there probably isn't one. Or at least that's the idea ;)
