This week, we conclude our look, for now, of record interference problems, with the three problems that I promised last week.
"The discovery of Burgess' problem led to a flurry of intensive effort which produced the next three problems, all with the full complement of six WK mates. The first problem is a beautiful version of Burgess' problem."
H.J. Burgess Braille Chess Magazine 1946 (Version by H.W. Grant and N.G.G. van Dijk) #2
"The following problem gives the matrix a quarter-turn."
H.W. Grant British Chess Federation Tourney 1967 #2
"Finally, the composers of the following problem, managed to combine the different elements so as to attain, at the cost of a bad key, the unique new record of 10 interferences."
V. Bartolovic and N. Petrovic British Chess Federation Tourney 1967 #2
6 points for sending me a complete variation to each problem, at email@example.com , by next Wednesday.