Trilos is a game system featuring Triangular Dominoes (twenty-four Trilos and one Joker,) two playing boards, and two tile holders that include clips for tracking scores. Each Trilo has a number of pips along each side, one through nine, and has a white face on one side, black on the other. The spots on each side are the same, so that on one side the numbers run clockwise, the other anti-clockwise, which is indicated by an extra mark.

The rules describe these games for play with Trilos:
Dom Trilo – a game of drawing Trilos and matching them on a table, in an attempt to rid one's hand of any remaining tiles
Stones and Windows – two players match randomly drawn Trilos around the blank edges of the small board (a triangular grid of 10 triangles the same size as the Trilos.) The goal is to be the first to use all one's Trilos or, if reaching an unplayable position, to score the fewest points on remaining Trilos.
Rummy Trilo – three players draw seven Trilos and privately try to match a pattern drawn in the rulebook, taking turns swapping out pieces until someone completes the pattern.
Crazy Pavement – a more complicated version of Stones and Windows, with players trying to match pieces around the numbered sides of the small board, tracking several different ways to score points. When the game becomes unplayable, the score determines the winner.
Khuti – two players lay Trilos on the larger board (which features a grid of twenty-two triangles,) attempting to fill the board while outscoring each other.
Khefren – two players engage in a slightly less difficult version of the above game, Khuti.
Two Patience Games – there are two solitaire games included in the rules, Pyramid Patience and Trilex Patience.
Troulette – a game of chance utilizing a scoring board drawn in the rules and the Trilos pieces.

Sir Patrick Alfred Caldwell-Moore CBE HonFRS FRAS (1923-2012) was an English amateur astronomer who attained prominence in that field as a writer, researcher, radio commentator and television presenter.

Moore was president of the British Astronomical Association; co-founder and president of the Society for Popular Astronomy; author of over seventy books on astronomy; and presenter of the world's longest-running television series with the same original presenter, BBC's The Sky at Night (from 1957). He became known as a specialist in Moon observation and for creating the Caldwell catalogue. Idiosyncrasies such as his rapid diction and monocle made him a popular and instantly recognisable figure on British television.

Outside his field of astronomy, Moore appeared in the video game television show GamesMaster. Moore was also a self-taught xylophonist and pianist, as well as an accomplished composer. He was an amateur cricketer, golfer and chess player. In addition to many popular science books, he wrote numerous works of fiction.

Regarding board games - as I understand it most of the boardgames that were marketed by Denys Fisher toys came after my father had sold his company to Palitoy at the end of 1969.

Dad was a mechanical engineer so the sorts of toys he invented tended to be mechanical devices such as Spirograph and Cyclex. The boardgames were handled by others at Denys Fisher toys - probably a man called Bob Fieldhouse who was dad's managing director.

As far as board games - dad had a lifelong passion for chess and was a very strong player. I do still have his antique chess board that has been passed down as a Fisher family heirloom for several generations now

Denys Fisher (11 May 1918 – 17 September 2002) was an English engineer who invented the spirograph toy and created the company Denys Fisher Toys.

He left Leeds University to join the family firm, Kingfisher (Lubrication) Ltd. In 1960 he left the firm to set up his own company, Denys Fisher Engineering, in Leeds. In 1961 the company won a contract with NATO to supply springs and precision components for its 20 mm cannon. Between 1962 and 1964 he developed various drawing machines from Meccano pieces, eventually producing a prototype Spirograph. Patented in 16 countries, it went on sale in Schofields department store in Leeds in 1965. A year later, Fisher licensed Spirograph to Kenner Products in the United States. In 1967 Spirograph was chosen as the UK Toy of the Year.

Denys Fisher Toys, which also produced other toys and board games, was sold to Palitoy in 1970 and it was subsequently bought by Hasbro. Through the 1980s and 1990s Fisher continued to work with Hasbro in developing new toys and refining Spirograph.