win. |} This convention has been used in some later works, such as Fundamental Chess Endings and Secrets of Pawn Endings by Karsten Müller and Frank Lamprecht, 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 grandmaster Robert Hübner prefers an even more specific and restrained use of move evaluation symbols: Chess composition When the solution to a certain chess problem is given, there are also some conventions that have become a common practice: move is marked with at least one "!" move is marked with "?" Refutation to a try move is marked with "!" When is a part of the thematic content of a problem, avoided duals (if listed) are marked with "?" Positions These symbols indicate the strategic balance of the game position: Other symbols There are other symbols used by various chess engines and publications, such as Chess Informant and Encyclopaedia of Chess Openings, when annotating moves or describing positions. Many of the symbols now have Unicode encodings, but quite a few still require a special chess font with appropriated characters. Move-related Positions or conditions See also Algebraic notation (chess) Chess notation Numeric Annotation Glyphs Chess symbols in Unicode Footnotes References Bibliography Chess notation Lists of symbols