moved-black-piece-relation.cql; moved-black-piece-relation.cql can be downloaded here.
; Pairs of positions with the source in the mainline and the target ; in the variations. They differ only in that ; a single black piece has moved. They are reached by a path from ; their latest common ancestor that has at least 15 consecutive ; identical moves. (A "Warning: truncating long comment" warning when running ; this file can be ignored). ; The output is sorted by the number of consecutive moves cql(input heijden.pgn variations) mainline relation variation (tomove match) (sourcesquares a targetsquares _ mismatch 1) (sourcesquares _ targetsquares a mismatch 1) (mismatch 2) (sort "number of common consecutive moves" lcasubstring 15 1000)