You said

Remember, Qa2b3 means that there are three queens, potentially at a2, a4, and b4

Now in your reply you are showing a queen at a2, a3, and c2, and in this case there's no argument that Qa2b3 is unambiguous and necessary.

Please understand, I wasn't disputing the occasional need to use both rank and file, just querying how you could deduce the existence of three queens from Qa2b3

So forgive me if I misunderstood you, but perhaps you can see how my confusion arose.

 

In reply to Re: Re: Re: Re: Re: Re: Parsing Chess Algebra Notation by EdwardG
in thread Parsing Chess Algebra Notation by cyocum

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