# Re: Chess symbol rotations (revisited)

From: Garth Wallace <gwalla_at_gmail.com>
Date: Tue, 14 Apr 2015 07:46:47 -0700

On Tuesday, April 14, 2015, Hans Åberg <hans.gustav.aberg_at_icloud.com> wrote:

>
> > On 14 Apr 2015, at 02:21, Garth Wallace <gwalla_at_gmail.com <javascript:;>>
> wrote:
> >
> >> On Monday, April 13, 2015, Hans Aberg <haberg-1_at_telia.com
> <javascript:;>> wrote:
> >>
> >> > On 13 Apr 2015, at 23:18, Garth Wallace <gwalla_at_gmail.com
> <javascript:;>> wrote:
> >> >
> >> > I'm much further along on my research for a proposal to encode
> >> > heterodox chess symbols. I asked about terms for rotations last
> >> > November and was told that the terms in use in the standard are
> >> > CLOCKWISE-ROTATED and ANTICLOCKWISE-ROTATED (e.g. U+29BC), but I
> >> > wasn't sure I would be proposing the knights in intermediate 45 degree
> >> > rotations.
> >>
> >> Have you checked if they are here:
> >>
> >>
> > The Piececlopedia doesn't really address symbols directly, it
> > describes pieces by their moves. Rotated chess piece symbols are used as
> placeholders, with their actual identities as pieces assigned on a
> problem-by-problem basis (only the 180 degree turned queen and knight are
> fixed by convention, to the grasshopper and nightrider). Think variables,
> rather than constants. So, for example, in one problem a knight turned 90
> degrees clockwise may be a camel (1,3 leaper), in
> > another problem a mao (xiangqi horse), and still another problem may use
> a knight turned 90 degrees counter-clockwise for the camel instead. Without
> context, it means "a knight-like piece of some variety, but not an actual
> knight". This is long-standing practice in fairy chess problems.
>
> The mathematical symbols are a mixture of graphical and semantic
> descriptions. For example
> ⊂ SUBSET OF U+2282
> ⇒ RIGHTWARDS DOUBLE ARROW U+21D2
> So one can have both.
>
>
> Yes, and so far my proposal also covers some dedicated compound piece
symbols, but my question is about naming some of the rotated ones.
Received on Tue Apr 14 2015 - 09:48:13 CDT

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