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Sign in to savechess formation that consists of two or more pieces on the same rank, file, or diagonal
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promotion
Entity
chess tactic
Entity
online chess
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chess
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International Standard Book Number
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blog
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pawn
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king
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rook
Entity
queen
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knight
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bishop
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FIDE
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castling
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Grandmaster
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chess opening
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Chess Olympiad
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checkmate
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Oxford University Press
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Deep Blue
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