When annotating chess games, commentators frequently use widely recognized annotation symbols. Question marks and exclamation points that denote a move as bad or good are ubiquitous in chess literature. Some publications intended for an international audience, such as the Chess Informant, have a wide range of additional symbols that transcend language barriers. The common symbols for evaluating the merits of a move are "??", "?", "?!", "!?", "!", and "!!". The chosen symbol is appended to the text describing the move (e.g. Re7? or Kh1!?); see Algebraic chess notation. Use of these annotation symbols is subjective, as different annotators use the same symbols differently. Evaluation symbols Moves Move evaluation symbols, by increasing effectiveness of the move: ?? (Blunder) The double question mark "??" indicates a blunder, a very bad move that severely worsens the player's position. Typical moves that receive double question marks are those that overlook a tactic that wins substantial or overlook a checkmate. A "??"-worthy move usually results in an immediately lost position. Occasionally, the sign is used for a move that transforms a won position into a draw. Blunders occur at all levels of play in all human competitors. ? (Mistake) A single question mark "?" indicates that the annotator thinks that the move is a poor one and that it should not have been played. Mistakes often lead to loss of tempo, material, or otherwise a worsening of the player's position. The nature of a mistake may be more strategic than tactical; in some cases, the move receiving a question mark may be one for which it is difficult to find a refutation. A move that overlooks a forthcoming brilliant combination from the opponent would rarely receive more than one question mark, for example. Whether a single or double question mark is used is subjective and may depend on the player's strength. For instance, if a beginner makes a serious strategic error (for instance, accepting gratuitous pawn weaknesses or exchanging into a lost endgame) or overlooks a tactical sequence, this might be explained by the beginner's lack of skill and be given only one question mark. If a master were to make the same move, some annotators might use the double question mark to indicate that one would never expect a player of master strength to make such a weak move. ?! (Dubious move) This symbol is similar to the "!?" (below) but usually indicates