[Retros] Mushikui Reconstruction mathematical(+retro) question

[Kevin Begley]

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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