Editing Algebraic notation (chess) (section)

===Disambiguating moves===
{{Chess diagram
| tright
| 
|  |  |  |rd|ra|x1|  |rd
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|rl|  |  |  |  |  |  |  
|  |  |  |  |ql|  |  |ql
|x2|  |  |  |  |  |dl|  
|ua|  |  |  |  |dl|  |  
|rl|  |  |  |x3|  |  |ql
| {{olist|...Rdf8|R1a3|Qh4e1}}
}}

When two (or more) identical pieces can move to the same square, the moving piece is uniquely identified by specifying the piece's letter, followed by (in descending order of preference):
# the file of departure (if they differ);
# the rank of departure (if the files are the same but the ranks differ).

If neither file nor rank alone is sufficient to identify the piece (such as when three or more pieces of the same type can move to the same square), then both are specified (double disambiguation).

In the diagram, both black rooks could legally move to f8, so the move of the d8-rook to f8 is disambiguated as '''Rdf8'''. For the white rooks on the a-file which could both move to a3, it is necessary to provide the {{em|rank}} of the moving piece, i.e., '''R1a3'''.

In the case of the white queen on h4 moving to e1, neither the rank nor file alone are sufficient to disambiguate from the other white queens. As such, this move is written '''Qh4e1'''.

As above, an "x" can be inserted to indicate a capture; for example, if the final case were a capture, it would be written as '''Qh4xe1'''.