Part of the Beginner's Chess Guide (Section 3)

# Advantage Detection Guide[Control]

Control

A Pawn or Piece "Controls" the squares it can legally move to; protect; or, capture on, in any given turn ...

They DON'T Control the respective squares they happen to sit on - keep that in mind!

So, what about two Pieces that both have sight of the same square?

Technically, both Pieces would have a certain amount of Control over that square, but neither Piece would dominate it, over the other - they'd Share Control.

Domination would begin to occur when one side moves another Pawn or Piece to also target that same square - effectively doubling the Pressure with TWO units observing the one square.

If the opposing side doesn't launch another Pawn or Piece to attack that square, they will LOSE Control of it, while the other will GAIN Control of it.

Now you know how a single Square can be Controlled by one side, it's easier to scale things up, in your mind, to determine when material happens to Control:

Naturally, the player who Controls more squares and regions will be the one with a distinct Advantage.

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