An html version of smotheredmate.cql.

Created by Gady Costeff and Lewis Stiller.

CQL 5.1
; black smothered mate

cql(input heijden.pgn)
btm mate
attacks 0 (k [.A])
sort "black material advantage"
   powerdifference -1000 1000 (a A)


CQL 3.2
;;This looks for black smothered mates on the edge or on the center of the board. (Dutch=Stikmat).
(match
 :pgn heijden.pgn
 :output smotheredmate.pgn
 (position
  :mate :btm
  :attackcount k a 5 8
  :attackcount k [A.] 0
 )
)

After executing this with "> cql SmotheredMate.cql" there are 42 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 5 studies are showed: