3 Changed the diagram to use the site replayer/PGN viewer
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I was playing chess this afternoon on my mac, as human vs computer. In the position below,:

enter image description here

[FEN "6k1/5pp1/2p3bp/pqP1P3/2R3P1/PPQ5/4K3/8 w - - 0 24"]

I tried to place the rookRook in front of the black queenBlack's Queen (b4), but this action was blocked and the rookRook remained in the same place. Later I completed the game by making another move.

Why is this so? Why can't I place the rookRook in front of the black queenBlack's Queen? Please explain this.

I was playing chess this afternoon on my mac, as human vs computer. In the position below,

enter image description here

I tried to place the rook in front of the black queen (b4), but this action was blocked and the rook remained in the same place. Later I completed the game by making another move.

Why is this so? Why can't I place the rook in front of the black queen? Please explain this.

I was playing chess this afternoon on my mac, as human vs computer. In the position below:

[FEN "6k1/5pp1/2p3bp/pqP1P3/2R3P1/PPQ5/4K3/8 w - - 0 24"]

I tried to place the Rook in front of Black's Queen (b4), but this action was blocked and the Rook remained in the same place. Later I completed the game by making another move.

Why is this so? Why can't I place the Rook in front of Black's Queen? Please explain this.

    Tweeted twitter.com/#!/StackChess/status/242457549255897088
2 fixed grammar/formatting; edited tags
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unable to Why can't I place the rook in front of the Queenqueen?

iI was playing chess this afternoon inon my mac, as human vs computer. I am unable to make the following move, please seeIn the pictureposition below  ,

enter image description here

As you see the image i am tryingI tried to place the rook in front of the black queen (b4), but this action getswas blocked and the rook is remainsremained in the same place. later iLater I completed the game by moving othersmaking another move.

Why itis this so, why? Why can't iI place the rook in front of athe black queen, please? Please explain this  .

unable to place the rook in front of the Queen

i was playing chess this afternoon in my mac, as human vs computer. I am unable to make the following move, please see the picture below  enter image description here

As you see the image i am trying to place the rook in front of the black queen, but this action gets blocked and the rook is remains in the same place. later i completed the game by moving others.

Why it so, why can't i place the rook in front of a black queen, please explain this  

Why can't I place the rook in front of the queen?

I was playing chess this afternoon on my mac, as human vs computer. In the position below,

enter image description here

I tried to place the rook in front of the black queen (b4), but this action was blocked and the rook remained in the same place. Later I completed the game by making another move.

Why is this so? Why can't I place the rook in front of the black queen? Please explain this.

1
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unable to place the rook in front of the Queen

i was playing chess this afternoon in my mac, as human vs computer. I am unable to make the following move, please see the picture below enter image description here

As you see the image i am trying to place the rook in front of the black queen, but this action gets blocked and the rook is remains in the same place. later i completed the game by moving others.

Why it so, why can't i place the rook in front of a black queen, please explain this