"Combinative vision manifests itself at an early age, and children are quick to notice and execute combinations which chance to turn up. Preparing combinations, however, is more difficult for them."
THE ENGLISH SCHOOL OF ANALYSIS:
"The word "combination" means different things to different people."
"... I bid farewell to my readers in the hope that they have formed their own opinion as to the meaning of the word "combination"."
The Chess Combination from Philidor to Karpov
"(3) 'IS IT A SYSTEM...?'