Algebraic notation

The most commonly used notation Worldwide for which the moves are described by algebraic coordinates as follows:
a) files are identified alphabetically by letters a-h
b) ranks are identified by numbers 1-8.
Combining these 2 together will give the proper designation for each square.
It can be written in 2 ways (both correct):
- short (used by the majority of chess players). It gives just the destination square; example 1.e4
- long (used by beginners while learning). It gives both the original and the destination square; example 1.e2-e4

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