Thank you stefano for the walkthrough. I came to many of the same conclusions and the overall contour of my snake was similar. My critical error was a false assumption that "E" was the only letter that could represent "2". In all of my trials "A" had to be "3" or higher. And my solutions came close but obviously could not be fixed. But the excellent walkthrough describes the thinking required. Thanks again. Perhaps I will rescind my current lifetime boycott of snake puzzles and risk getting frustrated again. It's the only way to get better.

bob

What is your opinion about rules, points and scoring for this test?

Fair