need help with solution-checker function

[hereathome]

A generator would be a good idea but the book instructs readers not to make use of knowledge that is taught in later chapters. Generators are in a later chapter. Still, that generator example is valuable code for me to study.

Thanks also for the idea of redoing the script using a simple list instead of a matrix. I'll see whether it works better. It could improve other parts of the script.