Proposal to add standardized variation sequences for chess notation

[Christoph Päper]

> Michael Everson <everson at evertype.com> hat am 6. April 2017 um 14:57
> geschrieben:
> 
>> That's what this proposal is all about. It's a good and sound proposal,
>> except for the empty square.
> 
> Do you mean “except for the light and dark squares without a piece on them” or
> “except for the light square without a piece on it”?

I meant "except for the squares without a piece on them".
 
> What is your specific counter-proposal?

Either VS-16 and Emoji property for pieces, being used with U+2B1B/C as empty
squares, as explained in a subsequent message,
or VS-1 and VS-2 sequences with a single codepoint to represent an empty square
(consistent with pieces).