Numberle variants may hide a number, equation, or ordered sequence, so confirm the exact rule before solving. Use an opening guess that samples varied digits or operators, then record correct positions, present-but-misplaced symbols, absent symbols, and duplicate behavior. Do not assume a gray duplicate means the symbol never appears elsewhere. Enforce leading-zero and arithmetic rules where applicable. For inconsistent feedback, include puzzle identifier, mode, guess, and exact color pattern.
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