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You could use as many items as you want. Pieces don’t management the sq. they occupy.

Accepted Answer goes to the person who has the least rating.

Piece value:

  • Pawn – 1
  • Knight – 3
  • Bishop – 3
  • Rook – 5
  • Queen – 9

Note1: The king has no rating, it was implied that it’s not allowed.

Note2: I meant to suggest only one color was allowed.

Yes that is How many Chess Pieces are wanted to regulate each sq. on the board? with out the set restriction.

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10

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I discovered another options which value $30$. I’m posting this within the hope another person can enhance any of those.

Cost-30-attack-all-squaresCost-30-attack-all-squares-2

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2

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I’ve an answer that prices 30. It is definitely from wikipedia:

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1

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I’m a bit late to the celebration, however here is an answer that prices 26:

enter image description here

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3