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A question mark followed by an exclamation mark, marking a doubtful move.
Also known as: Dubious move symbol, Questionable move mark
?! marks a move the annotator doubts but cannot refute — risky, probably inaccurate, yet not clearly losing. It leads with the question mark, and that order is the point.
Marks a move the annotator considers dubious — of doubtful value, though not demonstrably a mistake. A publishing convention rather than a rule.
A question mark immediately followed by an exclamation mark, written after the move.
The same two characters reversed. Whichever comes first carries the weight.