(Q3926583)

English

rule of the square

rule of thumb to determine whether a king can prevent an enemy pawn from promoting

Statements

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Cuadrado1.png
304 × 304; 955 bytes
example of the rule of the square: since the black king is within the 4×4 square of the white pawn, it can prevent the white pawn’s promotion (or capture the promoted piece immediately afterwards) (English)
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Cuadrado2.png
304 × 304; 931 bytes
example of the rule of the square: since the black king is outside the 4×4 square of the white pawn, it can’t prevent the white pawn’s promotion (English)
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