An html version of bristol.cql.

Created by Gady Costeff and Lewis Stiller.

CQL 5.1 example can be found at the website of GadyCosteff.

CQL 3.2
;;look for queen-bishop bristols ;; (match :pgn heijden.pgn :output bristol.pgn (position :sequence ((position :movefrom Bd4 Q[c3,e3,e5,c5] :shift) (position) (position :movefrom Q :raydiagonal (B Q)) (position Bd4 Q[c3,e4,e5,c5] :shift) ) ) )
After executing this with "> cql Bristol.cql" there are 8 studies found in the Harold van der Heijden Database V 2015.
NB. When you see {MATCH} in the text, it means that cql has found the position asked for.

Bristol theme. Anti-critical manoeuvre in which a piece moves over a critical target square allowing another piece to play over that same line to the critical square (thus employing an anti-metocritical manoeuvre).

The difference with the Turton voidance is that in a Bristol voidance, the critical piece performs no role in further play in support of the attacking piece.

Below only 4 studies are presented: