[Retros] 50 moves rule

raosorio at fibertel.com.ar raosorio at fibertel.com.ar
Sat Jan 6 07:33:57 EST 2007




Seth Breidbart wrote,

It seems to me that the underlying issue is the definition of
"position". Is it a photograph of the pieces on the board? That plus
information as to whose move it is? That plus information as to who
might be allowed to castle (and on which side) in the future?
(Consider a position in which White has not castled, his King and
Rooks have not moved, but it can be proven that there is no future
play which involves White castling; how does that count?)
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Good point. i think that "if it can be proven that there is no future play which involves
White castling" then white has already lost its castling right (understanding
right as a real chance to do it). This is to avoid the "bookkeeping" approach
as Guus set.
The same apllies to e.p. capture if the capturing pawn is pinned. There were no
real chance to make the e.p. capture so this position should count as "no e.p.
capture right".

Roberto Osorio




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