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 the FIDe elections were not decided by the votes of the delegates but by the world’s chess society as a whole, there would not even be a competition.
Anatoly Karpov NIC 2010
The main thing is that you’ve got to keep on studying however old you are. You can’t just rely on your capital, so you have to try and keep up, and that is a difficult task.
Nigel Short 2016
I detest the endgame. A well-played game should be practically decided in the middle-game!
David Janowski
The Golden Age, when machines were weak and my hair was strong!
Garry Kasparov 2017
Drawing general conclusions about your main weaknesses can provide a great stimulus to further growth.
Alexander Kotov