An html version of DoubleCheckMateMiddleOfBoard.cql.

5.1 Created by Lewis Stiller

3.02 Created by Emil Vlasak. See EG206, page 284

CQL 5.1
; double check is mate, King not on edge of board cql(input heijden.pgn) mate attacks 2 (A kb-g2-7)

CQL 3.02
; Find all positions with a mate with doubble check and the black king in the middle of the board.
; A mirror mate is a Mating position in which all (eight) neighboring fields of the mated king are unoccupied. (match :pgn heijden.pgn :output DoubleCheckMateMiddleOfBoard.pgn (position :mate :attackcount A k 2 k[b-g2-7] ) )
After executing this with "> cql DoubleCheckMateMiddleOfBoard.cql" there are 37 studies found in the Harold van der Heijden Database 2015.
NB. When you see {MATCH} in the text, it means that cql has found the position asked for.

Below only 1 study is presented: