17 rooks on a Chessboard

17 rooks are placed on an 8 times 8 chessboard. Prove that there are at least 3 rooks that do not threaten each other.

♞WHAT IS INCLUDED♞ - 1 Chess Board & 32 chess figures; 2 Kings, 2 Queens, 4 Knights, 4 Bishops, 4 Rooks, 16 Pawns. Comes along with RADICALn Branded

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*Educational purposes: By playing chess, you can enhance your thinking logic ability, develop tactical strategy ability, improve intelligence, and

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Help! My opponent inverted their rook, what's the best move here

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File:ChessTemRegular-Rook.jpg - Wikimedia Commons