Each guess row becomes an exact feedback pattern
The page treats digits, operators, and the equals sign the same way Wordle-style tools treat letters. Green means the symbol is fixed in that spot. Purple means the symbol exists somewhere else. Black means the symbol is not available after duplicate handling is resolved.
Only legal 8-tile equations stay in the pool
The candidate bank is limited to valid classic Nerdle equations with one equals sign, standard operator precedence, and no leading zeroes. That keeps the result list practical instead of bloating it with impossible strings.
Next-guess scoring favors useful symbol coverage
When more than a few equations remain, the suggestion rail looks for a guess that tests common remaining symbols and strong positions. It is not trying to be clever for its own sake. It is trying to cut the pool faster.