Are you supposed to use an arrow → or not.
Where 'P' is the piece being moved (Pawn) , 'Q' is promotion to (Queen), 'e8' is the file ('e') and rank ('8')?
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According to Wikipedia's Pawn Promotion page,
When a pawn moves to the last rank and promotes, the piece promoted to is indicated at the end of the move notation, for example: e8Q (promoting to queen). Sometimes an equals sign (=) or parentheses are used: e8=Q or e8(Q), but neither format is a FIDE standard. (An equals sign is also sometimes used to indicate the offer of a draw when written on the scoresheet next to a move, but this is not part of algebraic notation.)4 In Portable Game Notation (PGN), pawn promotion is always indicated using the equals sign format (e8=Q). In older books, pawn promotions can be found using a forward slash: e8/Q.
According to the World Chess Federation (FIDE) handbook,
C.12 - In the case of the promotion of a pawn, the actual pawn move is indicated, followed immediately by the first letter of the new piece. Examples: d8Q, f8N, b1B, g1R.
Also in the same section, it is not necessary to denote the piece that is being moved if it is a Pawn.
A pawn promotion move has =Q =N =R or =B appended to that.
Note: Standard algebraic notation (SAN) is the official notation of the FIDE which must be used in all recognized international competition involving human players. Concerning computer chess, SAN is a representation standard for chess moves inside the Portable Game Notation standard using the ASCII Latin alphabet, and should be supported as default notation by all modern chess programs and their user interfaces.
It is also quite possible that the OP was wondering about the use of → (arrow) or not with Figurine Algebraic Notation (FAN). Unfortunately, U+2654 or ♔ and other chess glyphs do not always appear as they should . This is most likely due to the default fonts used in most browsers.
FIDE is not the arbiter of chess-notation. By far the most common way to express promotion using algebraic notation is
e8=Q (note that you do not write
P for pawn, only the space it moves to). This is also the only style supported by PGN, the most widely used format for recording games on a computer.
e8(Q) are also sometimes used, mostly by old-timers or old books.
I have never seen (I guess I have seen it, I just never really noticed :) see below)
[Edit] By request, I did a small sampling of the literature I have available.
Of the 22 chess books I own, 14 use algebraic while 8 use descriptive (primarily because they are older books). Of the 14 algebraic:
1 uses the
So it looks as those
e8Q is not as unpopular as I originally thought, but
e8=Q is still overwhelmingly the most popular.