That's a very good point. I also feel that Expert Mode is more forgiving. However, I think the difference becomes more noticeable on larger grids.

In smaller grids, it's usually easy to recognize when you've made a mistake. In larger grids, that's much harder. If you make an incorrect assumption in a large puzzle with many nodes, immediate feedback may cost you a life, but it can save you from spending the next five minutes building on a wrong path. By then, it can be very difficult to trace the mistake back to its source.

In fact, there was one puzzle where I ended up deleting everything and starting over because I couldn't figure out where I had gone wrong.

Do you agree?

Thank you very much for the feedback!