[Retros] Mushikui Reconstruction mathematical(+retro) question
Kevin Begley
kevinjbegley at gmail.com
Mon May 23 10:36:02 EDT 2011
I presume any check/checkmate can be replaced by stalemate, as well.
On Mon, May 23, 2011 at 5:10 AM, Mu-Tsun Tsai <tsai39 at illinois.edu> wrote:
> The type of piece that's captured isn't used, so that should be 'Ne6xf4+'
>> (i.e. 7).
>>
>> This seems to work as 8 though:
>> W: Kh1 Bd1 Ne2 Ne6 Ng2
>> B: Kh5 Pf4
>> Ne2xf4++
>>
>> Joost
>>
>
> I made a remark earlier that double checks are denoted simply by "+", not
> "++".
>
> So indeed 7 is the length of the longest possible move string. Some
> possibilities includes:
>
> (1) Capturing promotion and check(mate), like "cxd8=Q+"
>
> (2) Disambiguous capture and check(mate), like "Qf6xg7#", as you mentioned
>
> (3) En passant capture and check(mate), like "axb6ep+"
>
> These are the only three possible types for a length 7 move.
>
> Recall that the format I'm using is the same as described in PGN spec
> document,
> except for the only difference being that I put "ep" to denote en passant.
> I now call this the "PGNep" format. Here's the discussion on this issue.
>
> http://www.pairlist.net/pipermail/retros/2011-May/003504.html
>
>
> Mu-Tsun
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