1.b4 Nc6
The grigorian variation, the knight is placed on the c6 square unlike a6 square which occurs in the bucker defense. Here too the knight can be pushed around the area of the board and has to be defended well by white failing which the pawn moves made might backfire.
Grigorian variation involves the knight play in the center, similar to bucker defense white might have an option to push around the knight on the board and this might seem quite scary for black but the players having practice of playing the Alekhine defense opening comfortable even playing this variation of the polish defense.
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