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Pawn quadrant

The pawn quadrant is a well known rule that every beginner should learn. It can change the course of a game drastically. It also helps you determine if your pawn can promote. This is the rule, sometimes called the square of the pawn. You should make a square with 4 points: The promotion square of a passed pawn, where the pawn is now and make the other points. Here is what I mean:

Note that this rule doesn't work with other pieces or pawns on the board, like if black had a knight, then it would be different. 





If it's black to move:






If it's white to move:

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