A term used in chess composition or chess solving. It means that every piece must contribute towards the solution, through not necessarily in the main line.
ECHESSPEDIA
Quotes of the Day
.If we compare Carlsen with Anand or me or someone else, by ten criteria, he will be stronger in eight of them.
Veselin Topalov 2015
I understood that through chess I could express myself and chess became my natural language.
Boris Spassky 1995
School is a waste of time for me. I want to be world chess champion, and they can’t teach me anything there.
Robert Fischer 1961
Chess is beautiful enough to waste your life for.
Hans Ree
Chess is a fairy tale of 1001 blunders.
Savielly Tartakower