An html version of echostalemate.cql
; echostalemate.cql can be downloaded here.
;Find games in which there are two
;positions P1 and P2, not the same,
; with the same side to move, such that P1 is a stalemate, and such that
; P2 is reached from P1 by a shift or a flip (or a shift and a flip)
(match
:pgn heijden.pgn
:output out.pgn
(position
:stalemate
:relation (:shift ; allow shifts
:samesidetomove ; same side to move in P1 and P2
:originaldifferentcount 1 100 ; disallow identical positions
:flip) ; allow flips
:variations ; search in variations
)
)