end game

end game idiom
The final stage of some process, as in The book discussed the diplomatic end game resulting in the treaty. This term, dating from about 1880, comes from chess, where it denotes the stage of a game when most of the pieces have been removed from the board. In the mid-1900s it began to be transferred to other activities.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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