The British Chess Variants Society (or BCVS) was an association of chess variant players and developers active between 1997 and 2010. The Society took over publication of "Variant Chess", a chess variant magazine which had been published since 1990; the magazine ceased publication with the dissolution of the Society.
The association ran from 1990+7 - 2010
( z1 run :ARG1 ( z2 association ) :time ( z3 date-interval :op ( z4 date-entity :year 1990 :month 7 :day 7 ) :op ( z5 date-entity :year 2010 :month 7 :day 7 ) ) )