Punctuation (chess)
Encyclopedia
When annotating chess
Chess
Chess is a two-player board game played on a chessboard, a square-checkered board with 64 squares arranged in an eight-by-eight grid. It is one of the world's most popular games, played by millions of people worldwide at home, in clubs, online, by correspondence, and in tournaments.Each player...

 games, commentators frequently use question mark
Question mark
The question mark , is a punctuation mark that replaces the full stop at the end of an interrogative sentence in English and many other languages. The question mark is not used for indirect questions...

s and exclamation points to denote a move as bad or good. The symbols normally used are "??", "?", "?!", "!?", "!", and "!!". The corresponding symbol is juxtaposed in the text immediately after the move (e.g. Re7? or Kh1!?, see algebraic chess notation
Algebraic chess notation
Algebraic notation is a method for recording and describing the moves in a game of chess. It is now standard among all chess organizations and most books, magazines, and newspapers...

).

Use of these annotation symbols is always somewhat subjective, as different annotators use the same symbols differently. Moreover, an annotator's use of symbols is often influenced by the player's strength: a positional misjudgment that an annotator might give a "??" if played by a strong grandmaster might pass unremarked if played by a beginner. Annotators' use of punctuation also tends to be influenced by the result of the game; in the 11th game of the 1972 World Championship, Spassky
Boris Spassky
Boris Vasilievich Spassky is a Soviet-French chess grandmaster. He was the tenth World Chess Champion, holding the title from late 1969 to 1972...

 played a very surprising move, 14.Nb1, retreating the knight
Knight (chess)
The knight is a piece in the game of chess, representing a knight . It is normally represented by a horse's head and neck. Each player starts with two knights, which begin on the row closest to the player, one square from the corner...

 to its initial square. Spassky won the game, and the annotators invariably gave the move two exclamation points. Edmar Mednis
Edmar Mednis
Edmar John Mednis was an American International Grandmaster of chess born in Riga, Latvia. He was also a popular and respected chess writer.-Biography:...

 observes that if Spassky had lost the game, the move would likely have been given two question marks instead.

??: Blunder

The double question mark "??" indicates a blunder
Blunder (chess)
In chess, a blunder is a very bad move. It is usually caused by some tactical oversight, whether from time trouble, overconfidence or carelessness. While a blunder may seem like a stroke of luck for the opposing player, some chess players give their opponent plenty of opportunities to blunder.What...

, a very bad mistake. Typical moves which receive double question marks are those that overlook that the queen
Queen (chess)
The queen is the most powerful piece in the game of chess, able to move any number of squares vertically, horizontally, or diagonally. Each player starts the game with one queen, placed in the middle of the first rank next to the king. With the chessboard oriented correctly, the white queen starts...

 is under attack or overlook a checkmate
Checkmate
Checkmate is a situation in chess in which one player's king is threatened with capture and there is no way to meet that threat. Or, simply put, the king is under direct attack and cannot avoid being captured...

. Whether a single or double question mark is used often depends on the player's strength. For instance, if a beginner makes a serious strategic error (for instance, allowing doubled pawns
Doubled pawns
In chess, doubled pawns are two pawns of the same color residing on the same file. Pawns can become doubled only when one pawn captures onto a file on which another friendly pawn resides. In the diagram, the pawns on the b-file and e-file are doubled...

 or exchanging
Exchange (chess)
In the tactics and strategy in the board game of chess, an exchange or trade of chess pieces is series of closely related moves, typically sequential, in which the two players capture each others pieces. Any types of pieces except the kings may possibly be exchanged, i. e. captured in an...

 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 the master's strength to make such a weak move.

?: Mistake

A single question mark "?" after a move indicates that the annotator thinks that the move is a poor one that should not be played. However, the nature of the mistake may be more strategic than tactical in nature; or, in some cases, the move receiving a question mark may be one that is difficult to find a refutation for.

?!: Dubious move

This symbol is similar to the "!?" (below) but usually indicates that the annotator believes the move to be objectively bad, albeit hard to refute. The "?!" is also often used instead of a "?" to indicate that the move is not all bad. A sacrifice leading to a dangerous attack which the opponent should be able to defend against if he plays well may receive a "?!". Alternatively, this may denote a move that is truly bad, but sets up an attractive trap.

!?: Interesting move

The "!?" is one of the more controversial symbols. Different books have slightly varying definitions. Among the definitions are "interesting, but perhaps not the best move", "move deserving attention", "enterprising move" and "risky move". Usually it indicates that the move leads to exciting or wild play and that the move is probably good. It is also often used when a player sets a cunning trap in a lost position. Typical moves receiving a "!?" are those involving speculative sacrifices or dangerous attacks which might turn out to be strategically deficient.

Andrew Soltis
Andrew Soltis
Andrew Eden Soltis is a chess Grandmaster, author and columnist.He won at Reggio Emilia 1971–72 and was equal first at New York 1977. He was awarded the International Master title in 1974 and became a Grandmaster in 1980...

 jokingly called "!?" the symbol of the lazy annotator who finds a move interesting but cannot be bothered to work out whether it is good or bad.

!: Good move

While question marks indicate bad moves, exclamation points ("!") indicate good moves—especially ones which are surprising or involve particular skill. Hence annotators are usually somewhat conservative with the use of this symbol; for example, they would not annotate a game thus: 1.e4! c5! 2.Nf3! d6! 3.d4! cxd4! 4.Nxd4! Nf6! 5.Nc3! All the moves of this main-line Sicilian Defence
Sicilian Defence
The Sicilian Defence is a chess opening that begins with the moves:The Sicilian is the most popular and best-scoring response to White's first move 1.e4...

 are good ones, but the players have demonstrated little skill by simply following well-known opening theory.

Once the players start making good choices when faced with difficult decisions, however, a few moves may receive exclamation points from annotators. Typical moves receiving exclamation points are strong opening novelties, well-timed breakthroughs, sound sacrifices
Sacrifice (chess)
In chess, a sacrifice is a move giving up a piece in the hopes of gaining tactical or positional compensation in other forms. A sacrifice could also be a deliberate exchange of a chess piece of higher value for an opponent's piece of lower value....

, and moves that avoid falling into traps
Swindle (chess)
In chess, a swindle is a ruse by which a player in a losing position tricks his opponent, and thereby achieves a win or draw instead of the expected loss. It may also refer more generally to obtaining a win or draw from a clearly losing position. I. A. Horowitz and Fred Reinfeld distinguish among...

.

‼: Brilliant move

The double exclamation point ("‼") is used to praise a move which the annotator thinks really shows the player's skill. Such moves are usually hard to find. These may include sound sacrifices of large amounts of material and moves that at first glance seem very counter-intuitive.

The Nunn Convention

In his 1992 book Secrets of Rook Endings and other books in the series (Secrets of Minor-Piece Endings and Secrets of Pawnless Endings), John Nunn
John Nunn
John Denis Martin Nunn is one of England's strongest chess players and once belonged to the world's top ten. He is also a three times world champion in chess problem solving, a chess writer and publisher, and a mathematician....

 uses these symbols in a more specific way in the context of endgames where the optimal line of play can be determined with certainty:
  • ! – the only move which maintains the current evaluation of the position: if the position is theoretically drawn
    Draw (chess)
    In chess, a draw is when a game ends in a tie. It is one of the possible outcomes of a game, along with a win for White and a win for Black . Usually, in tournaments a draw is worth a half point to each player, while a win is worth one point to the victor and none to the loser.For the most part,...

    , this is the only move which does not lose; if the position is theoretically won, this is the only move which secures the win. An "!" is used no matter how trivial the move in question; the only exception is if it is the only legal move.
  • !! – a particularly difficult-to-find "!" move
  • ? – a move which negatively affects the evaluation of the position: if the position had been drawn before the move, it is now lost; if won before the move, it is now drawn or lost
  • ?? – an obviously bad "?" move
  • !? – a move which makes the opponent's task harder or one's own task easier; for example, in a theoretically lost position, a move which forces the opponent to find several "!" moves in order to win
  • ?! – a move which makes the opponent's task easier or one's own task harder; for example, in a theoretically won position, a move which requires several subsequent "!" moves in order to win


This convention has been used in some later works, such as Fundamental Chess Endings and Secrets of Pawn Endings by Karsten Müller
Karsten Müller
Dr. Karsten Müller was born November 23, 1970 in Hamburg, West Germany. He is a German chess Grandmaster. He earned the Grandmaster title in 1998 and a PhD in mathematics in 2002 at the University of Hamburg. He placed third in the 1996 German championship and second in the 1997 German...

 and Frank Lamprecht
Frank Lamprecht
Frank Lamprecht is a German chess International Master and chess trainer. He is an author of Fundamental Chess Endings and Secrets of Pawn Endings, both with Karsten Müller.-External links:...

, but it can be safely assumed the convention is not being used unless there is a specific note otherwise. The Nunn convention cannot be used to annotate full games because the exact evaluation of a position is generally impractical to compute.

In 1959, Euwe and Hooper made the same use of the question mark, "... a decisive error...".

Hübner's approach

German
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 grandmaster Robert Hübner
Robert Hübner
Robert Hübner is a respected German chess Grandmaster, chess writer, and papyrologist . At eighteen, he was joint winner of the West German Chess Championship...

 prefers an even more specific and restrained use of move evaluation symbols:
"I have attached question marks to the moves which change a winning position into a drawn game, or a drawn position into a losing one, according to my judgment; a move which changes a winning game into a losing one deserves two question marks [...] I have distributed question marks in brackets to moves which are obviously inaccurate and significantly increase the difficulty of the player's task [...] There are no exclamation marks, as they serve no useful purpose. The best move should be mentioned in the analysis in any case; an exclamation mark can only serve to indicate the personal excitement of the commentator."

Chess composition

When the solution to a certain chess problem
Chess problem
A chess problem, also called a chess composition, is a puzzle set by somebody using chess pieces on a chess board, that presents the solver with a particular task to be achieved. For instance, a position might be given with the instruction that White is to move first, and checkmate Black in two...

 is given, there are also some conventions that have become a common practice:
  • Key move is marked with at least one "!"
  • Try move is marked with "?"
  • Refutation to a try move is marked with "!"
  • When dual avoidance is a part of the thematic content of a problem, avoided duals (if listed) are marked with "?"

∞: Unclear

It is unclear who (if anyone) has an advantage. This is often used when a position is highly asymmetrical, such as Black having a ruined pawn structure but dangerous active piece-play.

=/∞: With compensation

This symbol indicates that whoever is down in material has compensation for the material.

=: Even position

This symbol indicates that the annotator believes that White and Black have equal chances.

+/= (=/+): Slight advantage

This symbol indicates that White (Black) has slightly better chances.

+/− (−/+): Advantage

This symbol indicates that White (Black) has much better chances. It is often written as ± for White advantage, ∓ for Black advantage; the other similar symbols can be written in that style too.

Other symbols

Some annotators put together even more question marks and exclamation points. For example "???" or "????" might indicate a truly ghastly move, too horrid to give a mere "??", for example, 1.f3? e5 2.g4??? Qh4# (Fool's Mate
Fool's mate
Fool's Mate, also known as the Two-Move Checkmate, is the quickest possible checkmate in the game of chess. A prime example consists of the moves:leading to the position shown...

); an extraordinarily brilliant move might receive "!!!" or even "!!!!"; and a fascinating but probably unsound move might receive "?!?". However, use of such symbols is not common.

There are some other symbols used in multilingual publications such as the Chess Informant
Chess Informant
Chess Informant is a publishing company from Belgrade that periodically produces a book of the same name, as well as the Encyclopaedia of Chess Openings, Encyclopaedia of Chess Endings, Opening Monographs, other print publications, and software Chess Informant (Šahovski Informator) is a...

 and Encyclopaedia of Chess Openings
Encyclopaedia of Chess Openings
The Encyclopaedia of Chess Openings is a classification system for the opening moves in a game of chess. It is presented as a five volume book collection describing chess openings...

. These include:

↑: Time or initiative

These symbols indicate an advantage in initiative
Initiative (chess)
Initiative in a chess position belongs to the player who can make threats that cannot be ignored. He thus puts his opponent in the position of having to use his turns responding to threats rather than making his own. A player with the initiative will often seek to maneuver his pieces into more and...

.
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