# Gain

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The gain of a particular player’s individual, single move is the number of points by which it shifts the count in their favour. In combinatorial game theory, the “incentive” is a more general form of gain, expressed as a difference game.

## Discussion

PJT: Robert, it sounds as though you intend the gain to be a expressed as an abstract game, but the page count seems to suggest that that is calculated by averaging, and thus yields a number. It sounds as though we have a number of different usages to reconcile. Can you clarify?

RobertJasiek: A gain is a number, although I am not sure about CGT whether it might be a game there.

PJT: If it is a number, why do you prefer to call it an amount? (“Number of points” sounds a lot more natural in English.) If it can have an infinitesimal component (in CGT), then surely it must be a game there!

RobertJasiek: number of points is also fine.

PJT: Done!

PJT: N.B. I have since added the formal CGT definition of incentive to Value, but I expect you have seen that. I have also corrected the definition above to agree with WW and ONAG.

Path: <= Endgame =>
Gain last edited by PJTraill on June 5, 2019 - 00:28