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.
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Quotes of the Day
Petrosian would never have beaten me if he had played like that in 1963.
Mikhail Botvinnik 1966
Karpov Lost, Kasparov Lost, the Only One Who Remained Is Me …
Kirsan Ilyumzhinov 2014
What’s been bothering me is not that I haven’t won tournaments, but that I haven’t played very well.
Magnus Carlsen 2017
In the past twenty years Kramnik has played a few thousand games, and if you show me a position from one of them, in 90 percent of the time I will be able to tell you which game it is from.
Vishy Anand 2008
I was pushed out of USSR by the hands of Petrosian and Karpov. But now, after 10 years, Petrosian is not longer alive and Karpov is not longer World Champion, so it seems that everything is in place now.
Viktor Kortchnoi 1986 NIC